Caulking J-channel to pvc window trim?

Do it yourself Questions - If Your Bound & Determined
Post Reply
Message
Author
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.

User avatar
Windows on Washington
Posts: 4575
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?

User avatar
HomeSealed
Posts: 2436
Joined: Mon Feb 15, 2010 3:46 pm
Location: Milwaukee & Madison area

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.

User avatar
TheWindowNerd
Posts: 1801
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.

Post Reply