Does friction loss = air loss?

[jrbenny]

Foamed roof deck?

[mchild]

Foamed roof deck?

Yes, from the top plate out into the rafter tails and then up the bottom side of roof deck plus the gable ends. Had it done last spring. Big improvement in stopping the stack effect. Only did the old (circa 1890) part done, not the addition that was added about ten years ago. Measured summer temp in the attic of 89 with OAT of 94 and plenty of humidity (mid-Atlantic summer). Attic not done was 124.