How To Insulate On Roof 2x6 Frames

If you choose to use the 2x6 roof joists you ll only be able to fill the joist space up about 4 5.

How to insulate on roof 2x6 frames.

If you choose sistering 2x10 s then they have a net depth of 9 1 4. How to insulate a roof. Tongue and groove pine over that then. Cut and insert 1 or thicker high r foam insulation sheets r 8 per inch against the furring giving a 1 or greater air path between the insulation and the roof deck under the cathedral ceiling.

Also adding 2 vents between each bay of rafters which are 2 oc that vent out my soffits. I m wondering what the best way to insulate this roof would be. However i want to add a wood stove for next winter. Nail 1 furring along every rafter side against the roof deck.

The insulation would be flush with the roof wall 2 6 s. Soooo then install the same perimeter wood blocking right over the roll roofing to match insulation thickness 5 or so of polyiso. Then a vapor barrier over all that. I have a 14x26 cabin the roof is 2x6 10 pitch rafters with horizontal 2x4 purlins.

Building regulations for insulating a roof. Probably 1000 all put together for an r 49 roof in a 2x6 frame roof. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m. So your choices are 3 1 2 thick batt insulation for an r value of about r 11 9 or rigid insulation board for a r 20 to r 30 depending on the type of board.

The building is unheated now and the condensation is not too bad.