How To Lay Bitumen Roof Sheets

Seal the top of the roofing completely.

How to lay bitumen roof sheets.

Lay the individual sheets across the roof joists or cross beams. 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. 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. This helps in setting up the lap of the panels.

Once you see bubbles forming gently roll the roofing forward with your foot to install. Secure the sheets to the roof by using stainless steel fasteners. Secure the edge of the sheet at the gutter end every second corrugation. Make sure you space these fasteners every three to four corrugations.

Follow manufacturer s instructions for the sealant application. Install a corrugated roofing wall connector panel to a wall with roofing sealant when installing panels for a patio cover. If you have a short parapet wall you can usually roll the roofing sheets up onto it. Trim any excess with shears.

Lay the panels on the ground the way you want them to be on the roof. 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. Position and fix an additional purlin at the ridge to take ridge fixings. Start alternate courses of sheets with a half width sheet.

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. This forms a broken bond sheet pattern thus avoiding a 4 ply sheet thickness build up at the corners of sheets.