Foam Board + Composite Siding + No Window Flashing

 
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Old 08-12-2008, 03:44 PM   #1
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Foam Board + Composite Siding + No Window Flashing


This house had double hung aluminum clad wood windows from the 80s. There were moisture problems discovered under some of them during remodeling and it was obvious the sill where the wood meets the aluminum was badly warped from heat or whatever and the weatherstrips were disintegrating, so vinyl replacements were put in on the worst ones.

We then realize that it's not just the window that leaks but the exterior trim. Pulled it off and there was no flashing, just the nail fins nailed to the studs with trim on top.

It is some type of late 80s wood composite siding with foam insulation board directly behind it. The siding actually held up pretty good. There were wood spacers where I guess the foam should have gone up to behind the fins.

Anyway if they opt for new siding what would be recommended here with regards to this foam board stuff? Pull it off? Or just put Tyvek over the top of it?

Secondly, what to do with these replacement windows when the new siding goes on? Are they useless? Obviously the affected sill plate and cripple studs will be replaced because the front of them is rotted.
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Old 08-13-2008, 12:01 PM   #2
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Re: Foam Board + Composite Siding + No Window Flashing


I always want to pull off old siding.

Add in the fact that the siding was installed over foam board, I would definetly want to pull it off. Add in the fact that all that wood rot exists and I see no other way to properly do the job rather than pulling off the old siding.

Pull it off new weather barrier, new insulation (maybe) and then new siding. make sure everything is properly flashed. This methoid will last the longest althoguh most sidng guys will disagree and say it's perfectly fine to go over what's there with a 1/4" foam board. Sure it'll look good that day but as that composite continues to rot behind the vinyl, what will you do when it starts falling off the home?

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Old 08-15-2008, 09:15 PM   #3
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Re: Foam Board + Composite Siding + No Window Flashing


Well grumpy's right !!


BUT AT LEAST THE BATHROOM HAS A GFI!!!!!!!!!!!!!!!!!!!!!!
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Old 09-13-2008, 09:53 PM   #4
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Re: Foam Board + Composite Siding + No Window Flashing


Wow, never that! The aluminum windows should have been removed. Obvious shoemaker job. The "Leaks" may have been condensed moisture from within the most moist place in the home, the bathroom. Fix it right!
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