Best way to flash old window frames for new insert windows?
homeowner007
| Posted in General Discussion on
Our 1920’s house has 1980s replacement windows, trim coil, and vinyl siding. We want to reside with LP lap engineered wood, finished by traditional casing and trim profiles. We’ll be adding new building wrap over the original sheathing but I’m not sure how to flash the house wrap into these old window frames (maybe I’m overthinking it?). I found this FHB article https://www.finehomebuilding.com/project-guides/windows-doors/flashing-old-windows – do you think this approach would work for our needs?
Replies
If Mikey likes it, ( https://www.finehomebuilding.com/project-guides/windows-doors/flashing-old-windows ) that's a good way to go. I gotta say he's the only guy I know who'd freeze his peel'n'pray.
The important points are to apply your water resistant barriers shingle fashion- start at the bottom and work up. BUT, don't seal the bottom! You have to assume your work will leak eventually, so you have to be sure the water has a way to drain. There are lots of YouTube articles on window installation- study them until you have a feel for the process.
I'd consider Liquid Applied Flashing. It's not quite magic, but close. Check out
https://www.youtube.com/watch?v=7Aec4-TZbJQ and
https://www.youtube.com/watch?v=Mn5KaKu-tt0