July 29, 2021

Waterproofing a Flat Roof With Rubber

Flat roofs are common to find on mid-century homes. Due to the design, it has to be treated a bit differently. You cannot put standard shingles on it. Despite the name “flat roof,” there is still a slight pitch to it in order for water to drain properly. In this video, you will learn how to use rubber for waterproofing a flat roof.


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Before placing the rubber sheet on the roof, you have to prep it. By putting half-inch wood planks on the edges and a layer of insulation, it creates a barrier for the rubber sheet. This prevents objects like tree branches from tearing the rubber roofing due to the surface underneath. It is important to have the rubber sheet stretch over the edges of the roof. This prevents wind from lifting the material and letting water get underneath.

It is also crucial to attach a drip edge that is an inch or so away from the building in order to prevent leaking water down the side of the structure. Continue watching to see how the rubber material is applied and fastened to the roof.

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