J Channel slip joint



As requested, this is a more detailed video on how to merge two pieces of j channel together. Here I explain why you need to create a slip joint in j-channel and show 2 different methods to achieve said j-channel slip joint.

“Correction: 1:33 For Certainteed’s method I stated to cut out 3/4″ of the top rolled hem, this was incorrect – the over lap is supposed to be 3/4″ and cutouts on the rolled hem and nail fin are both supposed to be 1”

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19 Comments

  1. *Correction: For Certainteed’s method I stated to cut out 3/4” of the top rolled hem, this was incorrect – the over lap is supposed to be 3/4” and cutouts on the rolled hem and nail fin are both supposed to be 1”.

  2. Im in the middle of an install at my home and have run into a problem with the way the contractor installed j channel. How can I contact you and send a photo? Id love to see if this can be done better. Thanks!

  3. So how do you connect it to prevent water damage? I just realized that the garage door header sill it completely rotted out on my 14 year old house. It’s a double size door and the entire right side is rotted where the j channel is spliced.

  4. Hey Brandon, what tool do you suggest for cutting j channel? I have tin snips but they leave a bad finish. What kind of shears are those? Do you know the size? Cheers!

  5. I just overlap bottom piece 3/4 inch and roll the top piece into the bottom piece .no snipping .looks great and properly sheds water into lower piece with no breach in the channel.i do pinch the outer lip on the upper j channel w needle nose but not necessary.

  6. I’m having difficulty finding the best way to finish off a birdbox with vinyl fascia. Do you always use metal? I was wondering if it is worth renting a brake.

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