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I came across a YouTuber a while back who had some filler foam damage a door of his, so he did some back yard pressure tests: https://www.youtube.com/watch?v=3j33cbyXUVs He ended up with 90lbs of pressure against his bathroom scale after 5 days of the foam setting. It's not exactly the most refined experiment, but 90lbs is pretty startling.


Indeed it can, aggressively. So if you are using it to install door frames, for example, wedge a piece of wood the required size in the doorway while it expands. Several pieces of wood. You need helpers.


I have personally seen it bow "trimmer" studs in a framed window opening. It could easily warp, bow, or move a window frame itself. Breakage would likely be caused by users messing with/forcing the out of plumb/square/true window? Note: you can buy "low expansion" foam specifically designed to avoid this issue.


From experience, yes it can cause windows, doors, etc. to stick because the pressure pushes the frame closer to the door or sash. I just completed the finish work in a house and had to use my sawzall like a rasp around window frames to relieve the pressure before I could put the trim on them. I am not sure if the stuff can generate enough force to actually ...


I have seen it warp a window frame to the point that makes it difficult to operate, but, I have not seen it expand to the point it breaks a window.


One of the simpler ways to do this is with a framing square (a good tool to have on hand). You need to measure the top at the height where the tabletop will be. Mount cleats (long strips of wood running horizontally) to hold up the top along the three walls. Cut the two side walls a bit short so the cleats do not show once the tabletop is in place. Now ...


There are a lot of ways to do this, but here's one. The first thing I'd do would be to mark the walls where you want the table top to set with a pencil line or masking tape. (I'd use a level to make sure the lines are all at the same level, rather than measuring up from the floor.) The next thing isn't too hard - measure the length of the back edge. ...

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