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Old 06-11-2010, 06:57 AM   #1
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WRB before or after window install?


In Jersey I have been seeing people installing new construction windows before wrapping the house with WRB. Any thoughts on this practice? They say back caulking directly to plywood would eliminate the chance of water finding its way behind the window since their is nothing (no wrap) between the two.

Thoughts?

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Old 06-11-2010, 11:00 AM   #2
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WRB before or after window install?


I think they're wrong. The lapping will be wrong at the bottom of the window and water will get under the wrb there.

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Old 06-11-2010, 11:52 AM   #3
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WRB before or after window install?


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Originally Posted by luvdairish View Post
In Jersey I have been seeing people installing new construction windows before wrapping the house with WRB. Any thoughts on this practice? They say back caulking directly to plywood would eliminate the chance of water finding its way behind the window since their is nothing (no wrap) between the two.

Thoughts?
And their right.

Itís good for them because if any water gets behind the wrap it wonít leak in the window.

The bad thing is by the time you know you have a problem, the walls half rotted away and their long gone.
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Old 06-11-2010, 12:16 PM   #4
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WRB before or after window install?


The reason I'm asking is because I'm working a DIY project on my house and am trying to figure the best approach to water protection. Since the previous installers didn't seam to care much about that, I'm repairing all the damage from the old installation
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Old 06-11-2010, 01:19 PM   #5
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WRB before or after window install?


There should be an integrated house wrap and adhesvie membrane flashing tape around the windows. Just caulking the windows fins won't keep water from intrudung behind the siding.
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Old 06-11-2010, 04:14 PM   #6
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WRB before or after window install?


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Just caulking the windows fins won't keep water from intrudung behind the siding.
Ron
That is understood. But the question is, do you install the window (flashed, caulked and all) before or after the house wrap? My friends argument was, to caulk and flash, then install house wrap. It made sense, but then again I'm not a drop of water
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Old 06-11-2010, 04:54 PM   #7
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WRB before or after window install?


You could do something radical like follow the window manufacturers instructions and the wrb manufacturers instructions. They will be remarkably similar.
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Old 06-11-2010, 05:18 PM   #8
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WRB before or after window install?


the right way is to wrap first but with a 'flap' above the upper flange. The wrap then flaps down over the window.

Pictures explain it better. Scroll to a pic I took of my window install, post 39.

new hardi siding and windows - what have I started? aargh!
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Old 06-11-2010, 05:36 PM   #9
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WRB before or after window install?


Quite a few products used in that install. Tyvek, Typar, Grace...nice work!! So many variations on installs and so many products to choose from.
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Old 08-03-2010, 10:05 AM   #10
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WRB before or after window install?


I realize this project has been completed, but I found some info -- pretty much what was done here (derf36) -- that thought I'd post.

Here is link to housewrap, windows, caulking and typar flex flashing

http://www.finehomebuilding.com/how-...correctly.aspx


I am renovating/rebuilding a porch and am confronted with same question -- What is the proper way to do house wrap and install and seal windows?
I have 2x4 construction and have ordered vinyl windows with brick mold/JTrim and nailing flanges.



My intent is to follow this guide. Any thoughts/comments advice is most welcome.


Thanks.
orange

Last edited by orange; 08-03-2010 at 10:17 AM.
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Old 08-03-2010, 03:57 PM   #11
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WRB before or after window install?


Definitely follow the article as a guide. It has good advice.

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