Insulating Tongue And Groove Roof

This is often a layer of tongue and groove boards nailed to the exterior side of the exposed rafters.

Insulating tongue and groove roof. You can then roof over the osb surface with any conventional sloped roof application. In this video i install the tongue and groove raw timber walls in the van with polyester insulation and reflective barrier for a more comfortable and homely. Styrofoam brand tongue and groove extruded polystyrene foam insulation xps features tongue and groove edges on all four sides of 2 x 8 boards 1 thick or less and on the long edges of all other boards. The insulation for exposed rafters is installed on the exterior side of the finish ceiling.

The eps panels attach to the roof structure with long spikes. Install a 6 mil polyethylene vapor retarder over the tongue and groove roof planks. R 10 tongue and groove rigid foam board insulation sheathing 24dd the home depot. Another suggestion was to box out the roof with 2 bys.

No insulation at all. Such is the case with my house picture above it is a 1958 custom built a frame with 6 12 timbers and 2 6 tongue and groove roof boards. The overall panel thickness varies depending on the desired r value. Owens corning foamular 250 2 in.

Some have suggested using sips but others have advised that because this particular roof is cut up with valleys and dormers i would lose the labor savings associated with sips and end up with a very expensive roof. Inside you see the boards and shingles are on the outside.