How To Lay Bitumen Roof Sheets

If you have a short parapet wall you can usually roll the roofing sheets up onto it.

How to lay bitumen roof sheets.

It is important to start laying the sheets at the opposite end of the roof to the prevailing winds to prevent the side laps from facing into the wind which could cause uplift and water ingress. When laying sheets if they are corrugated allow a minimum of one corrugation and stagger the sheets using half a sheet to start the second course. Lay the panels on the ground the way you want them to be on the roof. Make sure you space these fasteners every three to four corrugations.

This forms a broken bond sheet pattern thus avoiding a 4 ply sheet thickness build up at the corners of sheets. Secure the sheets to the roof by using stainless steel fasteners. 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 a corrugated roofing wall connector panel to a wall with roofing sealant when installing panels for a patio cover.

Seal the top of the roofing completely. Run the tip of the flame along the crease between the roofing felt and the roofing roll. Seal the sides of the corrugated bitumen sheets with foam strips or spray foam. Once you see bubbles forming gently roll the roofing forward with your foot to install.

This helps in setting up the lap of the panels. If you ve got a pergola attached to your house then you might want to give yourself some extra shelter and protection from the weather simply by installing. Secure the edge of the sheet at the gutter end every second corrugation. The sheets cannot make a tight turn so there should be flashing or built up roofing in the corners so the roofing can make a gentle sweeping turn upward.

Lay the individual sheets across the roof joists or cross beams. Trim any excess with shears.