How To Lay Bitumen Roof

Let the sheets overhang the roof s edges by at least 2 in 5 1 cm.

How to lay bitumen roof.

Start at 1 end of the roof and unroll the bitumen to the other end. Place the first strip over the starter strips but don t overlap the roof edge. Unroll the roofing and cut a strip to the length necessary for your roof. Repeat the process for the rest of your flat roof.

There are different primers available for sealing the concrete roofs. Make sure the roofing is flat and free from creases and bubbles. Cut a half tab off for your first course shingles cut off a full tab for your second course shingles cut one and a half tabs off of your third course shingles cut two tabs off your fourth course shingles for your fifth course cut off half of the final tab keep your sixth course tabs intact. Use your foot and gloved hand to press the seam between the two sheets ensuring a tight seal.

Align the next sheet of modified bitumen roofing so it covers the edge of the first sheet by a few inches and repeat the process. Install drip edge and install 9 cant strips of roll roofing material along the rake and eaves edges gable ends and lower roof edge such that the roofing strip overhangs the roof deck by 1 4 to 3 8. A bit of melted bitumen should ooze out along the joint. Prepare roof edges cant strips.

After attaching the felt to the roof use a primer to prepare the roofing. It is best to apply these strips horizontally. Nail the roofing strips parallel to the roof edge set in 1 and 8 from the roof edge with nails spaced 4 o c. Start by laying asphalt felt or other underlayment over the roof.

Clean and insulate the roof. Repeat this with each roll until the roof is covered overlapping each sheet by about 3 8 in 0 95 cm. Overlap each row at least 3 to 4 inches. See below for a shopping list tools and steps subscr.

Ask this old house general contractor tom silva reveals the best ways to secure shingles to a roof. You may need to remove old flashings. Bitumen roofing rolls can be large and heavy so get help carrying them up to the roof if necessary. When it s positioned properly nail the roofing down with galvanized roofing nails every four inches along the top and bottom edges.

Get a sheet of bitumen roofing and roll it out allowing an extension beyond the perimeter of the roof. Using your staple gun secure the felt to the roof. Install new flashing metal.