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Old 08-08-2012, 09:11 PM   #16
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Quote:
Originally Posted by GBR in WA View Post
Foam board/canned foam the wall cavity --in the top 4" and air seal as mentioned. Add f.b. vertically on the second top-plate upward. Thermal bridge will be reduced to lower plate only = R-4.38 to exterior.

Gary
ok, i can do that.

i foamed one of the chutes with window & door, it took a lot of that. so today o bough some large, over 1", gap filler foam. is this ok ? i don't see why not, but idk.

and on the top plate, that doesn't have a chute, i took some pieces and fitted them horizontally . all the way to the roof sheathing. i was planning on foaming those down to the top plate. then filling the gap up to the roof. is that ok ?
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Old 08-08-2012, 09:25 PM   #17
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in the pic :

left side is the one chute i did.
right side is were i fitted the FB. i was planning on covering that FB with the large gap filler foam.

then the 4" under the top plate.

ok ?
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Old 08-08-2012, 09:29 PM   #18
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oh. and then, when i do the new siding with FB. i will take off the sofit and foam board up as high as i can on the outside. good plan ? part of the upper wall is above the sofit outside.
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Old 08-08-2012, 11:48 PM   #19
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Appears you are on the right track! Keep in mind that continuous (to vent every cavity) soffit venting is best, located as close to the fascia board as possible for best wind entrance and pressures. With f.b. outside, the cavity foam may be redundant. Depends on cost/location R-value requirements.

Gary
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Old 08-09-2012, 09:00 PM   #20
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Quote:
Originally Posted by GBR in WA View Post
Appears you are on the right track! Keep in mind that continuous (to vent every cavity) soffit venting is best, located as close to the fascia board as possible for best wind entrance and pressures. With f.b. outside, the cavity foam may be redundant. Depends on cost/location R-value requirements.

Gary
THANX, again, Gary

i cannot, for various reasons, vent every cavity. but it will vent every one i can. i expect this will end up being about 60% of them. even this will be TONS better than what was there, so i feel confident with it.
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