can you put solar panels on a metal roof

Can You Put Solar Panels on a Metal Roof? A Comprehensive Technical Guide

Yes, you can absolutely install solar panels on a metal roof. In fact, metal roofing is widely considered one of the best substrates for photovoltaic (PV) systems due to its longevity, structural integrity, and compatibility with modern mounting hardware. However, the installation process differs significantly from asphalt shingle roofs, and the specific type of metal roof you have—standing seam, corrugated, or metal tile—dictates the mounting method, hardware selection, and labor complexity. This article examines the technical nuances, cost implications, and long-term performance of pairing solar panels with metal roofing, providing you with the data-driven insights needed to make an informed decision.

1. Types of Metal Roofs and Their Solar Compatibility

Not all metal roofs are created equal when it comes to solar installation. The profile of the metal panels determines which mounting system you can use, how the roof expands and contracts with temperature changes, and the overall waterproofing strategy. Understanding the three primary categories is essential before any site assessment.

Standing Seam Metal Roofs: The Gold Standard

Standing seam roofs feature vertical legs that rise above the flat pan of the panel, creating a raised seam that connects adjacent panels. These seams are typically 1.5 to 2.5 inches tall and are either mechanically seamed or snap-locked. The key advantage for solar is that manufacturers like S-5! and IronRidge offer clamp-based mounting systems that attach directly to the seam without any roof penetration. This preserves the roof’s integrity, maintains the warranty, and significantly reduces the risk of leaks. Installation speed is also faster—typically 30% quicker than penetration-based methods on shingle roofs.

Corrugated Metal Roofs: Penetration-Based Mounting

Corrugated roofs, characterized by their wavy, ribbed profile, require a different approach. Because there are no raised seams to clamp onto, installers must use roof-penetrating brackets with rubber washers or EPDM gaskets. These brackets are screwed directly into the structural decking through the metal panel. While this method is proven and reliable when installed correctly, the potential for future leaks increases if the fasteners are over-torqued or the gaskets degrade over time. High-quality stainless steel fasteners and proper sealant application are non-negotiable.

Metal Tile and Shake Profiles: Specialized Adapters

Metal roofs that mimic the appearance of clay tiles or wood shakes present a unique challenge. These profiles are not flat and have complex curves. Solar installers typically use tile hooks or custom brackets that conform to the specific profile of the metal tile. These systems often require cutting or modifying the metal tile, which can void the roof’s warranty if not approved by the manufacturer. It is highly recommended to consult the roofing manufacturer’s installation manual before proceeding with this roof type.

2. Critical Considerations Before Installation

Before you sign a contract with a solar installer, several technical and logistical factors must be evaluated. These include the age and condition of the roof, the structural load capacity, and the thermal expansion characteristics of the metal.

Roof Age and Condition Assessment

If your metal roof is nearing the end of its lifespan (typically 40-70 years for standing seam, 30-50 for corrugated), it is prudent to replace it before installing solar. Removing and reinstalling a solar array to accommodate a new roof is costly and labor-intensive. A thorough inspection should check for existing corrosion, loose fasteners, and compromised seam integrity. If the roof has less than 10 years of useful life remaining, a roof replacement should be factored into the solar project budget.

Structural Load and Wind Uplift Calculations

Solar panels add weight to the roof—typically 3 to 4 pounds per square foot for the panels and mounting hardware. Most metal roofs are designed to handle this load, but local building codes require a structural engineer to verify the roof’s capacity, especially in regions prone to heavy snow or high winds. Wind uplift is a particular concern with metal roofs because the panels can act as a sail. The mounting system must be rated for the specific wind speed zone of your location. Clamp-based systems on standing seam roofs generally have higher wind uplift ratings than penetration-based systems.

Thermal Expansion and Contraction

Metal roofs expand and contract significantly with temperature changes—up to 1 inch per 100 feet of roof length for aluminum and 0.78 inches for steel. The solar mounting system must accommodate this movement. Clamp systems are designed to slide along the seam, while penetration-based systems require oversized holes or slotted brackets to prevent the fasteners from shearing. Failure to account for thermal movement can lead to panel warping, fastener fatigue, and premature roof leaks.

3. Mounting Systems: A Comparative Analysis

The choice of mounting hardware is the single most important decision in a metal roof solar installation. The table below compares the three primary mounting categories based on cost, labor, and warranty implications.

For standing seam roofs, the S-5! MiniClamp or similar systems are the industry standard. These clamps are made from 6061-T6 aluminum and are compatible with most seam profiles. They require no drilling, no sealant, and can be installed in minutes. For corrugated roofs, the FlashLoc or QuickBolt systems provide a reliable penetration-based solution with EPDM gaskets and stainless steel hardware.

4. Installation Process Step-by-Step

Understanding the actual installation sequence helps you evaluate contractor proposals and identify potential shortcuts. A professional metal roof solar installation follows a strict protocol to ensure safety and longevity.

Step 1: Site Survey and Layout Design

The installer maps out the roof dimensions, identifies the seam spacing, and uses a solar design software to optimize panel placement. The layout must account for roof penetrations (vent pipes, chimneys), shading from nearby trees or buildings, and the location of the electrical inverter and main panel. For standing seam roofs, the design software will specify the exact seam locations where clamps will be placed.

Step 2: Pre-Installation Roof Inspection

A final inspection is performed to identify any existing damage. The installer checks for loose seams, damaged panels, and signs of corrosion. Any issues are documented and communicated to the homeowner before work begins. This step is critical for liability and warranty purposes.

Step 3: Mounting Hardware Installation

For standing seam roofs, the clamps are positioned on the seam and tightened to the manufacturer’s specified torque (typically 12-15 ft-lbs). The torque is critical—too tight can crush the seam, too loose can allow the panel to slide. For corrugated roofs, pilot holes are drilled, a bead of sealant is applied, and the bracket is screwed into the decking. The fasteners must be self-tapping with a hex washer head to ensure a watertight seal.

Step 4: Rail and Panel Attachment

Aluminum rails are secured to the clamps or brackets, and the solar panels are attached to the rails using mid-clamps and end-clamps. The panels are wired together using MC4 connectors. Grounding is established using copper wire and grounding lugs, ensuring the entire array is bonded to the building’s grounding system.

Step 5: Electrical Connections and Inspection

The DC wiring is routed to the inverter (either string inverter or microinverters), and the AC side is connected to the main electrical panel. A final inspection by the local building department and utility company is required to obtain permission to operate (PTO). This step can take 2-6 weeks depending on the utility.

5. Cost Analysis: Metal Roof vs. Asphalt Shingle

One of the most common misconceptions is that solar installation on a metal roof is prohibitively expensive. While the hardware costs are slightly higher, the labor savings on standing seam roofs can offset the difference. The table below provides a comparative cost breakdown for a typical 6 kW residential system.

As the table illustrates, the cost difference between standing seam metal and asphalt shingle is minimal—often less than 5%. The corrugated metal roof is the most expensive due to the additional labor and sealing materials required. However, the long-term savings on roof replacement (metal roofs last 2-3 times longer than shingles) make the overall lifecycle cost more favorable for metal.

6. Longevity, Durability, and Performance Metrics

Solar panels are rated for 25-30 years of performance, and metal roofs are designed to last 40-70 years. This synergy means that the solar array will likely need to be removed and reinstalled at least once during the life of the roof. However, the performance of solar panels on metal roofs is not adversely affected by the substrate. In fact, the reflective nature of some metal roof coatings can slightly reduce panel temperature, improving efficiency by 2-3% in hot climates.

Heat Dissipation and Efficiency

Solar panels lose efficiency as temperature rises—typically 0.3% to 0.5% per degree Celsius above 25°C. Metal roofs, especially those with a light-colored, reflective coating (like Kynar 500), can reduce the ambient temperature around the panels by 5-10°C compared to dark asphalt shingles. This can translate to a 1.5% to 5% increase in annual energy production. In a 6 kW system, this could mean an additional 150-300 kWh per year, worth $20-$40 annually.

Maintenance and Inspection Requirements

Metal roof solar installations require minimal maintenance, but periodic inspections are recommended. For standing seam roofs, the clamps should be checked for torque annually, especially after a severe storm. For corrugated roofs, the sealant around the fasteners should be inspected every 2-3 years and re-applied if cracking or peeling is observed. The panels themselves should be cleaned 1-2 times per year in dusty or pollen-heavy environments.

7. Warranty Considerations and Manufacturer Approvals

The interaction between your solar installer’s warranty, the solar panel manufacturer’s warranty, and the metal roof manufacturer’s warranty is complex. A single misstep can void one or more of these warranties.

Roof Manufacturer Warranty Requirements

Most metal roof manufacturers (e.g., standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standing seam systems from standi