That is because it s not only the quality of the roof installed that matters with the addition of a professional touch you will have a roof that will serve you for 20 years or more.
Is a flat roof also a built up.
The build up roof.
The built up roof is generally a flat roof or a low pitched roof which is made of a number of levels.
However when the flat roofing installation is up to very high standards it can add a few years to the life.
Bur consists of many layers.
A gravel and tar built up roof is exactly that layers of gravel and asphalt laminated felt on top of a flat roof.
A bottom layer or two of insulation board multiple intermediate layers of tar or asphalt alternated with layers of roofing felt and a top layer of gravel.
Built up roofing bur built up roofing bur was the most common type of flat roof before modified bitumen and membrane roofing were developed.
As you might imagine this is the cheapest version possible and good for covering a shed.
Also known as the built up roof bur this type of flat roof features three or more layers of waterproof material mixed in an alternating fashion with hot tar and a layer of smooth stone like gravel.
Flat roofs exist all over the world and each area has its own tradition or preference for materials used.