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fitzofury 04-26-2010 01:00 PM

Proper Vinyl Window caulking With Hardi-plank
We had a contractor replace the siding and two windows on our garage with hardi-plank and new vinyl windows. After the work was done I noticed a couple small parts of caulking that got missed - not a big deal. Yesterday we were painting the new siding and realized there was caulking around both sides and the bottom of the new windows, but when I was up on a ladder painting, I noticed there was no caulking on the top of the window from the edge of the siding to the window trim (about 1/4"-1/2" gap). I figured they forgot to caulk the area and so I went ahead and caulked. :wallbash:

I talked to my neighbor (a pm for a gc) last night and he said the reason they did not caulk the top of the windows was to allow trapped moisture to escape out and around the windows. :huh:

So this morning I decided I should try and cut the caulk out from the top of the windows since it sounded like the contractor didn't caulk up there for a reason. Well...I was running a razor to cut the caulk out and noticed I was slicing the waterproof membrane used to seal the windows. So I decided to stop what I was doing and now I don't know what to do. I live in Portland Oregon so we have a very wet climate. I'm not sure if I should continue to try and get rid of that caulk or just re-caulk the whole area and be done with it.

Garage was wrapped with home wrap and the windows are just builder grade vinyl windows from Jeld-Wen. They are installed with the factory flange and "z" flashing over the trim and a waterproof membrane was added over the flanges. hardi-plank over the top of everything else.

kwikfishron 04-26-2010 01:19 PM

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I'd still try to get the caulking out it doesn't have to be a perfectly clean job just good enough not to trap the water. A far as cutting the membrane your probably alright since you cut it so low there is still at least 1”+ of it stuck to the top flange of the Z metal. Just go a little easier on the rest of it.

fitzofury 04-26-2010 01:33 PM

Kwik - thank you very much for the prompt reply. I think I can more skill-fully cut the caulking out with the razorblade. I just kind of forgot about the waterproof membrane initially when I was slicing and I only sliced an area about an 1" long before I realized what I was doing and stopped. Thanks again! :thumbsup:

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