Furring Roof Rafters

Spacing of furring strips for metal roof when installing a metal roof over an existing roof insulate the spaces between the wood strips with rigid insulation to prevent condensation before.

Furring roof rafters.

Before you cut your boards you ll need to measure the width of your building and calculate the exact length of each rafter. They are compatible with many different kinds of synthetic underlayment. If you re framing a gable roof on a new house or building a shed or even a doghouse with a gable roof you ll need to cut a number of roof rafters. That s what my framers always did to fur out for insulation.

This gives me 3 5 of foam for a pretty decent thermal break. When placing rafters for a tin roof also frequently referred to as corrugated metal or steel it is common to set the distance between rafters based on the size of the roofing panels. The sips use 7 16 osb as their skins and 8 polyurethane cores. Furring strips are required if you plan to place a metal roof on top of existing shingles.

Episode 51 wow what an incredible weekend of work. Instead of 2 foam i m going to purchase 1 5 thick so my strips will match my rafters on the 1 5 side. On this roof i only walked the ridges but on a metal roof of 6 12 or less a good pair of tennis type shoes on dry metal will allow you to walk without slipping. It would be possible with furring strips but harder as each one may be different.

If the existing rafters aren t all nice and straight you could straighten up the ceiling with some sisters. It is 12 12 so not much snow sticks. My roof is a very simple gable with a 5 12 pitch. Malcolm you mentioned the advantech sheathing and i read up on it and there is a lot of positive reviews.

It is supposedly even better than plywood. Cut 2x4 blocks and nail screw into side of rafter then add your 2x4 stacked on the rafter. Even if you used a 2x6 you want it to extend below the existing lumber so it wouldn t have to go all the way to the roof decking. The roof rafters provide integral structural support to the roof.

I have been past the house in the last year and the same roof is on the house. Furring strips nailed into the rafters through the shingles. 00 tj 4 lift 35 s 4 56 s. The 2x4 in the photo represents the rafter then 3 5 of foam then furring strip all held together with 5 screw.

Metal roofs depend on thin strips of wood known as furring to allow air to circulate and prevent rot. If you hire a contractor they can explain all of this to you.