How To Build Waterproof Flat Roof

In the majority of cases the covering will be plywood or osb timber which is more commonly called stirling board.

How to build waterproof flat roof. The 8 step process for diy installation step 1. Following cleaning priming of the surface is designed to improve the adhesion of the membrane. A polyester carrier is then combined with this coating to create a waterproof material. Primers also aid to.

Allow the vapor barrier to dry before you add a second coat. Work systematically from one end to the other spraying in lines. When timbers are used in flat roofing they obviously need to be waterproofed so boards are normally laid across the joists and then a felt or rubber is used to cover the boards to make them waterproof. The best way to waterproof a flat roof.

Frame the roof one important and perhaps not so obvious fact is that a flat roof is not actually flat. Flat roofs are an attractive aesthetic choice that give homes a unique form. The third step is the. Overlap the previous line every time you start a new one.

Measure each surface area of your roof s length and width in feet. The process involves bonding together two to three layers of bitumen that are laid across the full surface of the flat roof. Multiply the total length with the total width. Pour your chosen vapor barrier into a paint sprayer after the primer is dry and liberally spray an even coat onto the concrete roof.

Use a mixture. Add the plywood once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. This gives you the. Clean your roof with a pressure washer or broom ensuring all the dust and dirt is removed.