First steps for planning PV on a flat roof

In the UK, solar photovoltaic (PV) is the most popular renewable energy and its deployment is rising rapidly across the globe, particularly because climate change and resource scarcity are on the agenda of every government and major corporation in the world. Despite recent UK Government policy changes, the number of large, flat roof installations should still rise as local authorities and businesses look to reduce their carbon footprint and gain energy security for the future.

All too often within the construction industry, photovoltaic specifications focus on energy efficiencies and outputs of the solar panels, omitting to give the same focus to ensuring the rooftop array is installed with methods that have as little impact on the building and its waterproofing as possible and that the array works to its maximum potential for its entire lifespan rather than just becoming a ‘tick box’ exercise to achieve sustainability credits.

This information is aimed at designers considering the inclusion of a PV array on flat roof construction projects and outlines the key elements to be mindful of to ensure the design is sustainable, protects the building and meets lifespan expectations.

We have two design guides to suit either a new build construction or retrofitting a PV array to an existing roof:

New Build
Design Considerations

PV Design Considerations

PV New Build Design Guide

Flat Roof Design Guide

Download the guide Download the guide