How to J channel around windows

     Installation of vinyl siding is not a rocket science. So if you got hit with a white hot beam of desire to do it and you believe you can do it, then no doubt, roll up your sleeves and lets start hitting nails.
      Let us  do something interesting of vinyl siding installation. I think we should go ahead and do that noble job of j channeling a window. 
       What do we need for that? Very simple hand tools: a vinyl siding shears, a hammer, and 1'' 1/2 or 2'' roofing nails, use 2'' if you have fanfold insulation on. You can use 1'' 1/2 nails if you have tyvek on and plywood  walls. 

We have tried different ways how to do it  and by trial and error we finally got to the best one. The j channeled window looks nice and watertight, stays that way for many years.   

Step #1
Check the frame of the window and clean anything that is not gonna allow for a j channel to lay flat to the side of the window.

Step #2
Start j channeling the window from the bottom, make cuts on both ends of the j channel. 

Step #3
Place the side j channel and mark it, then mark the bottom j channel. Do not forget to extend the side j channel above the top of the window frame, make it at least 1 inch above the top of the window.

Step 4 
Cut the side J channel by the marks

Step 5
Cut the bottom j channel and lock the side j into the bottom. 

That's it, we are all set, do the same way on all corners of the window. Remember the top has to be done the last. First goes in the bottom, then 2 side j channels and then the top.