Cool Roof
A roof finished in a high-reflectance surface to reduce solar heat absorbed into the building.
On an actual building
In Mumbai it measurably reduces heat gain into the top floor and into conditioned or temperature-sensitive spaces. China mosaic achieves it traditionally; reflective single-ply membranes achieve it in modern construction.
What we most often have to correct
That it replaces insulation. It reduces the heat entering the roof surface; it does not insulate the slab.
Terms that come up alongside this one
- China Mosaic
A terrace finish of broken glazed ceramic tile pieces set in waterproofed cement mortar, laid glazed face up..
- TPO Membrane
Thermoplastic polyolefin single-ply sheet, typically 1.2 to 1.8 mm, whose seams are joined by hot-air welding rather than adhesive..
- Thermal Movement
Expansion and contraction of building materials as temperature changes.
Cool Roof — questions we get asked
What does cool roof mean in waterproofing?
A roof finished in a high-reflectance surface to reduce solar heat absorbed into the building.
Why does cool roof matter on a real project?
In Mumbai it measurably reduces heat gain into the top floor and into conditioned or temperature-sensitive spaces. China mosaic achieves it traditionally; reflective single-ply membranes achieve it in modern construction.
What do people commonly get wrong about cool roof?
That it replaces insulation. It reduces the heat entering the roof surface; it does not insulate the slab.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
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