Joining Flat Roof To Pitched Roof

A flat roof isn t actually flat.

Joining flat roof to pitched roof.

We ll start with the knowledge that the main roof has an 8 12 pitch. While that s the easiest route it s certainly not your only option. It appears to be flat but it needs a slope to allow the water to drain from the roof. The other is to get the fascias to line up.

Instead the roof must be done with a modified bituminous membrane e g. Joining these two roofs poses two main challenges. If you own a building with a flat roof the first thing your contractor will do is consult a structural engineer to make sure your structure can handle the conversion. This video will demonstrate how to integrate a cure it grp roof with a pitched roof.

Additional valleys angles and gables can be built into converted roofs as well but adding these elements may affect your project. Lets have a quick look at how to join a roof without an upstand where practical joining onto roofing felt with epdm roofing felt is bitumen based and it can be difficult to get any sort of good bond onto bitumen with anything other than a like for like bitumen product. For slopes less than 9 5 we cannot install roof shingles. Most homeowners choose to convert a flat roof to a pitched one using a simple trussed roof with two angled planes.

The roof needs to be tied in by lifting up some of the original tiles on the existing roof and then allowing the flat roof to run slightly underneath. This latest project was in early december in lambeth ontario for a residential home that had an existing sloped or shingled roof that needed to tie into a ne. After this roofing cement is applied around the complete area and then the missing tiles are replaced. Pitched roofs are usually much heavier than flat roofs so an easy replacement may not always be possible.

Flashing and more roofing compound are used to weatherproof the joint. One is getting the two differently pitched planes to meet at the hip or valley rafter. Flat roof connected to pitch roof. Joining different flat roofs.