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Best way to install new windows into existing opening with no wrap?

7 years ago

Current windows were installed into rough opening with nailing flanges, but no house wrap, or flashing at the window.

6" Cedar trim wraps the window, and then 2 layers of Grade D paper installed butting up to the trim for stucco.

New windows need to be installed due to failure of the window itself (2nd story picture leaking into 1st story). Old cedar trim will be removed, window taken out. And then you have a rough window opening with a 6" border around it of OSB, and then stucco.

What is the thoughts on the best way to install the window in that scenario? Do you try and integrate Tyvek wrap over the window opening and get it right with the stucco paper for proper draining plane, and install as normal?

Do you just ignore the house wrap, and put sealing tape on the sides and bottom of the recessed rough opening, then a flexible wrap on the sill, maybe a sill pan, and then install the window?

Everything I can find assumes that you have an easy to integrate the window into the house wrap for a draining plane, but have not found a good way for this scenario.

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Comments (2)

millworkman
7 years ago
"Do you try and integrate Tyvek wrap over the window opening and get it right with the stucco paper for proper draining plane, and install as normal?"

Yes unless you intend to replace it again after window failure due to leaking, and hopefully do not have major wall rot. Pictures would help but the install issue may rum even deeper than just this.
aclute
Original Author
7 years ago
Thanks. Any pictures would just be of the exterior right now as I am in the process of interviewing contractors to do the work, and trying to better understand what to ask and expect.

The challenge I am seeing is how they will get access to the stucco paper since it will not easily be exposed (stucco covering it) unless they remove part of the stucco as well.
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