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Old 04-10-2013, 10:56 PM   #1
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Attaching trim to vinyl jamb extension


I have two new windows with vinyl jamb extensions that I need to attach MDF casing to. How do I attach it closest to the reveal for a snug fit? Looking at other windows in my home it looks like the installers used a pneumatic nailer and just nailed into the vinyl jamb extensions??

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Old 04-11-2013, 05:36 AM   #2
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Attaching trim to vinyl jamb extension


We need more info---Is the vinyl extender solid or hollow? How deep? Is there any chance of the nails hitting the operating part of the window?

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Old 04-11-2013, 08:26 AM   #3
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Attaching trim to vinyl jamb extension


a lot of times a brad nailer (pinner)is used along the edge where the trim meets the extension and a heavier nail is used to hold the trim to the wall or/and some adhesive used as well
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Old 04-11-2013, 08:29 AM   #4
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Attaching trim to vinyl jamb extension


Picture...
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Old 04-11-2013, 09:31 AM   #5
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Attaching trim to vinyl jamb extension


Hollow, deep enough that nails won't hit or affect operation.

After wiggling the casings on my other windows it looks like the installers just pinned the casings into the vinyl. I'm thinking of using some adhesive with brad nails into the jamb extension and finish nails into the framing as mentioned.

I can take some pictures tonight.
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Old 04-11-2013, 12:57 PM   #6
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Attaching trim to vinyl jamb extension


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Originally Posted by n0c7 View Post
Hollow, deep enough that nails won't hit or affect operation.

After wiggling the casings on my other windows it looks like the installers just pinned the casings into the vinyl. I'm thinking of using some adhesive with brad nails into the jamb extension and finish nails into the framing as mentioned.

I can take some pictures tonight.
This will work just fine.

I was suggesting pictures because they are usually worth a thousand words.
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Old 04-11-2013, 11:52 PM   #7
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Attaching trim to vinyl jamb extension


Here are my existing windows:



Here are my new windows with jamb extensions:

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Old 04-12-2013, 06:58 AM   #8
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Attaching trim to vinyl jamb extension


the side you are showing is the outside, do not nail into hollow jamb extensions on the outside of structure. make sure window is shimmed correctly and only nail trim to solid wood surrounding window and use OSI Quad caulk to back caulk the trim where it goes over the extension. it is bad enough that they are hollow(bad theraml properties), adding holes in them is even worse....
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Old 04-12-2013, 10:28 AM   #9
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Attaching trim to vinyl jamb extension


That's the interior shot. The nail flange is on the outside. It's two windows laying against each other - an optical illusion

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