Caulking J-channel to pvc window trim?

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Yorkbrick
Posts: 1
Joined: Wed May 06, 2020 7:44 am

Caulking J-channel to pvc window trim?

#1 Post by Yorkbrick »

Hello,
New to the forum and was wondering if it's necessary to caulk the joint where the exterior window trim and vinyl J- channel meet. I have placed membrane behind the trim but, was wondering if this step should be done?

Thanks for any advise.

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Windows on Washington
Posts: 5311
Joined: Fri Oct 27, 2006 11:23 am
Location: DC Metropolitan Area-Maryland/Virginia/DC

Re: Caulking J-channel to pvc window trim?

#2 Post by Windows on Washington »

Is the trim tucked in or wrapped over?

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HomeSealed
Posts: 2996
Joined: Mon Feb 15, 2010 3:46 pm
Location: Milwaukee, Madison, SE Wisconsin

Re: Caulking J-channel to pvc window trim?

#3 Post by HomeSealed »

PVC textured coil stock, or solid material like azek trim boards?

Either way, if the nail fin, membrane, and flashing detail were done properly on the window install it shouldn't be needed. More aesthetic than anything in most cases.

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TheWindowNerd
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Joined: Fri Apr 17, 2009 3:05 pm
Location: SE PA & NJ; DFW/Metroplex

Re: Caulking J-channel to pvc window trim?

#4 Post by TheWindowNerd »

I would caulk it.
I want to keep as much water as possible on the exterior of the siding.

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