In this photo you can see an actual home where moisture damage is occurring. You can see how water can be funneled sideways in this picture. Here is the inside view of the vinyl j channel. Sometimes this isn't possible because installers want to line the siding up to be even with other siding for aesthetic purposes or because the siding is being ran vertically. However to use a starter strip you have to start with a whole piece. If the corner in this picture is not flashed correctly from underneath the J channel then moisture might penetrate the structure.Īctually the proper way to start horizontal vinyl is to use a metal starter strip. In this photo you can see how water flowing down the wall will be caught in the j channel where it will flow sideways until it finds an exit path. Let's take a look at a pretty picture to start our discussion. I see this problem more than I should even on new homes. Have you ever seen vinyl j channel used at the bottom of a wall and wondered what happens to the moisture trapped by the channel. When Vinyl J channel is used at the Bottom

How to remove j channel on vinyl siding