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Should I install new construction windows with flanges over existing frames or build temporary frames for replacements to avoid returning windows?

Asked by Rakshitha Bal
8 months ago
Last Updated: May 1, 2024

I’m looking for some advice on windows. Basically, I’m replacing all of mine and in a few spots I’ve changed the orientation and size. Those spots probably should have new construction windows with flanges, but here I am. Should I go ahead and 1) put flashing tape over them, build window frames slightly over it (like 1/4 inch), and then stucco up to that frame (pretending it’s a new construction window), or 2) remove the window, build a temporary frame to stucco up to, and then install the replacement windows over the stucco. I’m also open to other suggestions (except returning these windows for different ones because that was a hassle to get them in). I’d really appreciate some experienced advice on this!

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Cléa Guillot

Whatever your preference!

Rosalyn Reyes

Are you planning on installing the windows in the same location as before, or are you moving them to a different spot? If you’re moving them, make sure the framing above and below (header, jacks, and cripples) is done correctly to support the weight of the roof.

Marcia Powell

I think option two with a waterproof strip behind the windows and flashing/trim would work well.

Paulette Lefevre

Do you have enough time to do it properly?

Paulette Lefevre

We all dream of being able to, but that little voice of reason inside our heads says no chance, buddy!

Winesh Joziasse

Whether you go for new or old construction windows isn’t crucial. Focus on proper insulation and sealing when making repairs to walls and framing. Choose whatever method you’re comfortable with. I’ll be doing a similar project soon, replacing siding and rearranging rooms with updates planned for the kitchen and bathroom. Make sure the windows align correctly with the new floor plan.

Akhila Andrade

The setup resembles a trailer or storm window. Is that blue tape double-sided sticky window tape? If yes, remove it and place your sill squarely against it. Secure the sill to the existing one while pressing firmly against the tape. Remember to run caulk or silicone on the backside for better adhesion. Proceed to attach the side and top boards. Add a drip edge flashing on top and caulk the backs of the boards. Finish with stucco, final caulk, and you’re good to go.

Lorenza Lodders

Trim it down to ensure a solid seal, then cut and stucco it to match the trim. Apply a waterproof paint and then install gutters. Unless you’re dealing with horizontal rain, water shouldn’t be an issue for the windows.

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