How To Insulate On Roof 2x6 Frames

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.

How to insulate on roof 2x6 frames.

Probably 1000 all put together for an r 49 roof in a 2x6 frame roof. Heat rises and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls. Soooo then install the same perimeter wood blocking right over the roll roofing to match insulation thickness 5 or so of polyiso. The building is unheated now and the condensation is not too bad.

Screw it down and glue down a 45 mil epdm membrane. Building regulations for insulating a roof. 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. If you choose sistering 2x10 s then they have a net depth of 9 1 4.

Tongue and groove pine over that then. Nail 1 furring along every rafter side against the roof deck. I have a 14x26 cabin the roof is 2x6 10 pitch rafters with horizontal 2x4 purlins. Then a vapor barrier over all that.

Also adding 2 vents between each bay of rafters which are 2 oc that vent out my soffits. How to insulate a roof. The insulation would be flush with the roof wall 2 6 s. The limiting u value the maximise u value which cannot be exceeded required under current building regulations for the roof is 0 20w m.

Corrugated metal panels are screwed directly to the purlins with no sheathing.