Howzis sound?
The structure in x-section is 36 wide, with a 10 pitch roof, structural ridge, rafters bearing on 9/0 firstfloor walls on one side, bearing on a plate nailed to the edge of the second floor deck on the other side.
Got the picture so far? Let me add some detail. The rafters springing up from the 9/0 plates on the L of this pic make a cathedral ceiling for the firstfloor space below, up to about 2/3 of their length. The ceiling then goes flat, the joists having airspace above, and the flat ceiling is over the partial second floor, going over to a 5/0 kneewall on the R of this section view.
We are thinking of a sprayed urethane foam hot roof insulation scheme over the cathedral part, then going to a vented roof for the rest, with eave vents and chutes as required.
Sound legit?
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you lost me without a drawing
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Here ya go. The roof on the L, the area that is "cathedral" plus of course the dormer, would be 7" foam, and all else would be not foam and vented. Kneewall not shown on 2nd floor.
View Image
You lose a lot of the benefits of foaming a house when you don't do it all.Is this that economy job you've mentioned?
if so -I'd probably do dense pak cells or BIBBs over thermofoil panels inside. VB and no vents. But Vented or not depends on size of rafters and local codes.If not the econo job, I'd foam the whole house.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
It's the low ender. BIBBS? Is that a wine varietal?
Chopped fibreglas - dens blown
means blown In Blanket system
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!