Flat Roofing Process

Flat roof replacement process.

Flat roofing process.

Start at 1 end of the roof and unroll the bitumen to the other end. Roofing timber steel joists plywood exterior covering such as epdm or modified bitumen water based adhesive foam with fibreglass backing insulation warm flat roofing. Asphalt shingles are known for being one of the simplest types of roofing materials to install. Today s variety of flat or low slope commercial roofing options roof pitches ranging from 12 to 3 12 is no longer simple and has grown considerably in the last 50 years.

Roll modified bitumen roofing sheets over the entire roof. First lay a run of starter shingles along the bottom of the roof and nail them firmly into place using roofing nails a couple inches up from the edge of the roof. Remove and replace any and all rotted fascia. In addition you will still need tools such as a measuring tape drill and utility knife along with the following.

Clean the existing roof system as needed including flashings boots vents and rotted wood areas. The roof felt asphalt tar layering is repeated in overlapping layers until the assembly is two to fours plies in thickness. Things you ll need small spade hammer screwdriver bolster hammer screwdriver or drill screw with a chisel attachment wallpaper scraper epdm rubber water based deck adhesive large surface adhesive roller. Bitumen roofing rolls can be large and heavy so get help carrying them up to the roof if necessary.

Every roofing replacement project begins with a thorough inspection of the wood decking. The hot applied asphalt or coal tar pitch blends with the bitumen soaked roof felt and creates a monolithic roof membrane. Any soft wet or rotted wood needs to be replaced to create a solid base for your roofing structure. Prepare a valley between joined roofs by cutting a strip that is 18 inches wide and covers the entire length of the valley.

Add the plywood once you ve added the framing it s time to add a layer of 5 8 inch plywood sheathing. The 8 step process for diy installation step 1. Frame the roof one important and perhaps not so obvious fact is that a flat roof is not actually flat. Remove and replace any and all rotted roof sheathing throughout the entire roof area.

Repeat this with each roll until the roof is covered overlapping each sheet by about 3 8 in 0 95 cm.