How to install J Channel on an inside corner

Here’s a method I use to turn an inside corner with J-Channel. It keeps the joint in the jchannel nice an tidy. By keeping the J-Channel connected in the corner we eliminate the possibility of the two pieces separating and creating a gap between them. I tend to plan my 45 degree cuts to face them all down on all my jobs for job uniformity.

[@joelcabrera9138]

Where water will go to?

[@sidingschool]

Hi Joel, Good question. In these circumstances the water will flow out of the corners of the j channel. If there is a lot of water coming down, it will build up in the j channel until it flows over the face. The holes in the nail fin are higher than the face of the j channel so there should never be a problem with water overflowing the back. Also this j channel installation is underneath a roof so there will be very minimal water anyways.
In these situations (especially when there’s no roof covering) it is imperative that the housewrap, ice & water, and flashing underneath the siding is done correctly to prevent any water damage. Vinyl siding helps keep water off from a house, but properly installed housewrap and flashing is what prevents it from contacting the underlayment and causing rot.