How Hot Does A Green Roof Get

Green roofs can significantly reduce the amount of rain water that would otherwise run off an impervious roof surface.

How hot does a green roof get. A green roof will typically intercept the first 5mm and more of rainfall providing interception storage. A green roof also referred to as a living roof is where the roof of a structure has a garden growing over a waterproof membrane. In germany between 40 100 of rainfall can be retained dependent. Green roofs can also help reduce building energy usage and noise levels while increasing the durability and lifespan of the roof compared to conventional roofs.

Why would it be much different with a roof shingle. Metal roofs also get hot. This is especially pronounced in aging roofs. No pebble protection by august the roof had more blisters and ripples than a man could count.

Clearly black roofs get the hottest. I have a roof with a 2 12 pitch aka hot mop roofing. It has become common in large cities on high rise apartment buildings so that residents can get fresh vegetables or enjoy blooming flowers. The amount will be dependent on the depth and type of substrate in the green roof system.

In the summer a green roof can typically retain between 70 80 of the run off. While most are designed to last 20 years or longer black roofs can suffer because heat speeds up the breakdown of materials in fact heat wear and tear is the main issue from a longevity standpoint. A well maintained green roof can more than double the number of years before a roof needs to be replaced compared to a standard roof making up for some of the added costs of installation.