---
title: Solar PV installation on a standing seam roof
description: Solar PV installation on a refurbished office block in Woking
---

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# [Solar PV installation on a standing seam roof](https://www.myriadproducts.co.uk/news/solar-pv-installation-on-a-standing-seam-roof)

 Written by [Paul Clark](https://www.myriadproducts.co.uk/news/author/paul-clark) | Apr 16, 2026 9:15:00 AM

Myriad have recently completed a new installation of a solar PV system on a office complex in Woking with a standing seam roof covering. Fitting solar PV panels to standing seam roofs (e.g. Kalzip, Tata, Kingspan, or similar) is quite common — but it comes with some distinct challenges that need careful design and installation to avoid leaks, structural issues, or poor performance.

System overview

- 64kW DC installed: Solar Watt 455W panels
- 50kW AC installed: Solar Edge inverters
- Modbus Energy Meter for Smart Monitoring / G100 export control
- K2 mounting kit for standing seam - box type
- Optimisers fitted for DC shut off
- Firefighter gateway for remote DC shutoff
- 60MWh/yr expected generation

Mounting Method and Fixing Compatibility

- Standing seam roofs are actually ideal for solar PV because you can mount panels without penetrating the roof sheet.
- Special clamps (e.g. S-5!, Kalzip SolarMount, Renusol seam clamps) grip the seams mechanically — no drilling, no holes, no leaks.

**Seam profile compatibility** — not all clamp types fit all seams (e.g., double-folded vs. snap-lock vs. round-top).

- Incorrect clamp selection or overtightening can **damage the seam**, void the roof warranty, or cause deformation over time.
- Manufacturers often require **load testing or approval** of clamp types for their particular seam system.

**Structural Load and Seam Strength**

- Solar panels add **dead load (≈ 12–15 kg/m²)** plus **wind uplift loads**.
- Standing seam sheets are thin — loads must be transferred safely to **purlins** or **decking beneath** via the clamps.
- Often a **structural engineer’s sign-off** is needed for commercial systems.

**Wind Uplift and Panel Separation**

- Standing seam roofs can be quite “slippery” — if clamps aren’t correctly spaced, panels can shift under high wind.
- Edge zones and corners have **higher uplift pressures**, requiring extra clamps or rails, and a detailed **wind load calculation** to BS EN 1991-1-4

**Thermal Expansion and Movement**

- Standing seam roofs expand and contract along the seam with temperature changes.
- The PV mounting system must allow for **roof movement without stressing the clamps or panels**.
- Use **sliding clamps** or allow for movement slots in rails to prevent fatigue or noise.

**Earthing and Lightning Protection**

- The roof panels are often insulated from the structure, so **earthing continuity** is not guaranteed.
- A separate **equipotential bonding** and **lightning protection review** may be required to meet BS 7671 and BS EN 62305.

**Access, Walkability, and Maintenance**

- Standing seam roofs are **not designed for heavy foot traffic**.
- PV installation must use **load-spreading boards** to prevent denting or seam damage.
- Future maintenance (both roof and solar) must plan for **safe access** without damaging seams or coatings.

If you are looking at a similar project where the solar PV needs to sit above the roof mounted plant then give us a call today - 0203 189 0665

[View full post](https://www.myriadproducts.co.uk/news/solar-pv-installation-on-a-standing-seam-roof)

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