How To Lay Bitumen Corrugated Roof

Ensure the sheets are positioned square to the line of the eaves and verge first nailing the sheet edges.

How to lay bitumen corrugated roof.

To install corrugated roofing start by cutting your panels to length with an angle grinder. Continue adding panels until the roof is covered. Be sure before you fasten the roofing itself however that you lay down closure strips underneath where the screws will go. Place it at one bottom corner allowing an overhang of two inches on each edge.

Seal the sides of the corrugated bitumen sheets with foam strips or spray foam. Overhang the sheets at the fascia by 5cm to form a drip edge. Then attach the drip end flashings 8 to 12 inches apart. Install the panel so that the short lip overlaps the large lip.

Screw the new panel in place as described. Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart. Fitting sheets step 1. You may need to cut panels to fit angles using a circular saw with a metal saw blade.

Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses. When i built my garden shed in 1987 i used onduline corrugated roofing following the. Btm corrubit installation video. Make sure you space these fasteners every three to four corrugations.

Position and fix the verge barge board. Get help to lay the first sheet onto the roof. The silicone will spread and adhere creating a seal. The corrugation should run up the roof toward the ridge.

Trim any excess with shears. Sorry for the old video. Leave approximately 6 to 8 inches between nails. Metal roofing is also available in the form of shingles.

Secure the edge of the sheet at the gutter end every second corrugation. You can find the most recent onduline fixing guide on our website where you can save money on buy onduline roofing sheets http bi. Reduce the fixing centre to the first purlin up. Use cap nails and hammer them attaching the nails on the felt and the concrete.