Flat Roofs: From Problem Child to Design Powerhouse

Probably over 50% of clients' initial reaction to a flat roof will be negative, but is that now an unfounded reaction?

As an architect, it's fascinating to reflect on how much the perception and performance of flat roofs have evolved. Gone are the days of constant leaks and limited potential. Modern flat roof technology, advanced waterproofing systems, and innovative insulation solutions have truly transformed them into versatile and sustainable elements of contemporary architecture.

When is a flat roof, not a flat roof??

From creating valuable rooftop amenity spaces – think green roofs and terraces, to efficiently housing mechanical services and supporting solar arrays, the benefits are undeniable. They offer design flexibility, clean lines, and opportunities for maximising usable space on a constrained footprint.

Of course, successful flat roof design hinges on meticulous detailing, robust material selection, and expert installation.

But when done right, they're not just a structural element; they're an integral part of a building's performance and aesthetic appeal.

I probably invest far too much time in researching the roofing materials to provide my clients with the best warranties available. I have recently been in discussions with Polyroof, a UK manufacturer who provides the technical support and are happy to work from my plans to give my clients accurate specifications. On top of this they only sell to roofers who have been through their training and accreditation process, which enables them to keep control of the quality of their products and the installation.

Torched solutions are the traditional way but technology is catching up.

Roofing is still an area of construction that remains self-regulated; its industry body, the NFRC (National Federation of Roofing Contractors), is driving change through training and certification, but membership is not mandatory yet.

In an increasingly dense urban landscape, every square meter counts. That's why, as an architect, I see flat roofs not as a mere covering, but as a critical opportunity to add value and sustainability to our projects.