Why Do Roofs Have Rocks On Them

Roofing ballast is usually the little pebbles you see on a flat ish roof.

Why do roofs have rocks on them. Stuff i googled why do people have rocks on their roof 15 october 2011 at 07 11 reply also found some weird arizona thing about large rocks being placed on the roof to supposedly control the heat but i don t know if leave a reply cancel reply. I assume you re not talking about rocks meaning boulders but rather the layer of small stones you see not just on gas stations but on many flat roofs. Personally i dislike them. This appears to be a form of roof ballast.

Notify me of new posts by email. March 11th 2010 at 2 41 pm. You can still find houses here in the city with rock roofs. Ceramic granules came along several decades later and offered numerous color options not previously available.

To weigh down or secure the roofing material as is the case with single ply flat roofs. Granules were first added to shingles in the early 1900s and were primarily used for durability. Have you ever wondered why contractors install gravel on flat roofs. Remember trad italian roofs have much bigger overhangs on the eaves the bit which overhangs the long sides of a pitched roof and also on the verges which overhang the gables.

Gravel is used on flat roofs for two reasons. Ideally the stones are river gravel which has smooth edges and won t cut. Why do roofing shingles have granules. My question is why do gas stations sometimes have rocks on the roof.