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Old 10-30-2012, 12:42 PM   #1
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Exterior Layer Sequence


What is the correct sequence for the exterior?

Sheathing, house wrap, foam board or sheathing, foam board, house wrap?

Thanks.

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Old 10-30-2012, 12:46 PM   #2
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Exterior Layer Sequence


May want to share what it is your trying to do.
Is this new constrution, going over old siding?
Also make sure you have your location in your profile.

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Old 10-30-2012, 01:27 PM   #3
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Exterior Layer Sequence


what type of foam and what type of siding are you using
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Old 10-30-2012, 02:27 PM   #4
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Exterior Layer Sequence


And where do you live? What you do in GA is a lot different than say CA.
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Old 10-30-2012, 03:39 PM   #5
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Exterior Layer Sequence


Replacing windows which will require removing the existing vinyl siding. Not sure just yet what is under the siding. I suspect only 1/4" fan-foam board over the sheathing then the siding. I want to add a house wrap but need to be sure of the installation sequence.

Yes, I know, it would help to install a greater R-value foam board.

I suspect the house wrap would go over the foam board since the foam board would be harder to seal.

N.C.
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Old 10-30-2012, 03:52 PM   #6
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Exterior Layer Sequence


Now go back and let us know how the whole wall system was done.
Not a great plan to have foam on the outside in most cases. That would be a vaper barrier that needs to be on the inside not the outside. Double vaper barriers can lead to moisture build up inside the wall.
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Old 10-30-2012, 04:03 PM   #7
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Exterior Layer Sequence


Interior to Exterior Wall Assembly

Interior: 1x4 Oak Tongue and Groove

2x6 Studs

R19 Fiberglass (will know for sure when interior T&G is removed)

Exterior: 1x6 pine T&G

1/4" foam board (flat nailing surface for vinyl siding)

Nailite Rough Sawn Cedar Shake Vinyl Siding
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Old 10-31-2012, 05:32 AM   #8
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Exterior Layer Sequence


I have my answer.

http://www2.dupont.com/Tyvek_Weather...h_Bulletin.pdf

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