Retrofitted vinyl window warped at the top

alan_s_thefirstNovember 5, 2010

X-posted from windows forum:

My house was built in the mid-80's and has a number of retrofitted vinyl windows. The bathroom one has begun to bow downwards from the top - there's a wood sill incorporated and it's actually separated from the vinyl where they join.

I can't say if it's always been warped, or if it's just happened (it was never painted, and the factory undercoat is starting to come off, so it clearly needs painting.) It may have warped from the humidity, I'm not sure.

I was going to remove some trim and see if it was sprayfoamed incorrectly, in which case I'd cut some away and re-do it with the correct stuff.

What I thought I'd do is drive a few screws across the top, upwards, to pull it back square (it is opening and closing ok) gently, a few turns at a time.

I also noticed that when they installed it, they put a screw through the side of the vinyl part near the outside, rather than through the wood part, where I'd think the best part to fit a retrofit window would be.

Is this a good idea, or should I leave it? Now I'm aware of it, I hate the look of the bowed section.

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bow downwards from the top?, a wood sill incorporated? (that's at the bottom on the outside), vinyl part, wood part?

I can't tell what or where the problem is but you are lucky to get 25 years out of a vinyl replacement window.

    Bookmark   November 5, 2010 at 9:21AM
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As I said, the window's a retrofit. Only a few years old. The 'sill' is on the inside, forgive my terminology if it confuses. It fills the area from the edge of the vinyl part, near the outside, to the inside part of the house where the trim is attached.

I'm fairly certain the warping is from humidity, or incorrectly applied spray foam (or too much fibreglass insulation inserted too firmly.) Another window, presumably installed at the same time, had NO insulation or caulking of any sort between the framing and the window so who knows what's going on.(I updated the trim on the other window, I haven't gotten to that in this bathroom.) I guess I need to remove that trim.

    Bookmark   November 5, 2010 at 2:52PM
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