I'm planning an extension to my house, and want to make flat roof that will last a long time, is maintenance-free and tough enough for people to walk around on, and is fairly light in colour on the surface.
Can anyone recommend cost-effective materials? I'd something rigid rather than joists and plywood with a waterproof covering, which, in my experience tends to have limited durability.
Many thanks..
Concrete roof slab and paving stones set in pitch is the commercial solution.
So a concrete of some sort roof? Sounds a bit overkill for the average house extension?
I have a roof terrace where originally there was a pitched roof. Joists with decent ply over, than ashfelt. GRP concrete tiles (commonly called promenade tiles) on top. Has lasted well. Be overkill for only maintenance access, though.
I have a southwards facing laid bitumen roof on the extension with a small bit of a slope. When the sun is in full effect, it's melting and slowly drifting over the edge, and even things like discarded grass from birds nest manages to imprint itself. I daren't walk on it. It's painted with aluminium heat reflective paint, but I'm not hopeful this is a long term solution for water tightness.
I'd go fibreglass.
that's unusual.
One way to get longevity is to give the roof just a slight slope and use overlapping asbestos boards (or equivalent), then felt or tile it.
NT
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