Drill the centers of the holes that are 8″ from the center gap of the J-channel in both directions.Wiggle the horizontal J-channel to ensure that it has some room for expansion.Use a 1-¼” exterior screw to secure the horizontal J-channel, starting from the center of the center gap in the J-channel.Put the J-channel along the line you marked and into the vertical J-channel.You may need to remove a ¼” from each side of the J-channel, cut on a 45-degree angle, which will allow the J-channel to expand and contract during extreme temperatures.Mark where the horizontal J-channel will be.Slide the vinyl into the vertical J-channel.Measure the distance between the wall and the farthest edge of the J-Channel.If you decide to use J-channel on the bottom of your siding, you should follow these steps: Some contractors will not do this and use J-channel instead to line the siding up and make it look even. Instead, it would be best to use a metal starter strip, but this requires a whole piece. You definitely should not use J-channel where the siding meets the foundation. If you already have J-channel at the bottom of your siding, then you should drill ¼” weep holes every 24″ so that the trapped moisture can escape from the channel. It would be best if you do not use J-channel at the bottom of your siding because it will trap moisture in the track of the channel, which will lead to moisture damage.

You will primarily use J-channel around windows, doors, soffit, fascia, and walls. Do You Put J-Channel at the Bottom of Vinyl Siding?

Read on to discover everything you need to know about J-channels. Finally, you can cut J-Channel to any size you need. The size of the face is relevant to aesthetics. Its primary functions are to mount siding and direct runoff away from the siding. Ideally, it would be best to not put J-Channel at the bottom of your siding. You will trap moisture between the siding and your drywall, which will lead to moisture damage. Without using J-channel, you cannot hang siding effectively. You will not only hang the siding from J-Channel, but you will also use it to steer runoff from rain and other precipitation. J-Channels are valuable pieces of vinyl siding securers.

How to remove j channel