How To Install J Channel Under Existing Siding

Almost all of my windows have standard j channel that doesn t protrude very far.

How to install j channel under existing siding.

Is this possible with the existing siding already there. For the doors cut your side j channel pieces similar to the way you did for the windows. Your nails should be centered in the channel slots and the nail heads should remain 1 32 to 1 16 inches 0 7938 to 1 6 mm out. Mark out a notch 1 in.

We would ve liked to put 3 j channel to give the windows a bolder look. Even if i somehow put the new j channel over the original j for cosmetic purposes only that would suffice for me. Longer than the width of the window. The j channel will conceal the cut edges of the soffit lengths and will provide a watertight seal.

For doors and windows cut and install the top j channel piece flush with the outer face of the side j channels. Cut a tab in the bottom of the side j channels and fold under. Cut a section of new j channel 2 in. This old house general contractor tom silva shows how to prevent water from leaking in behind vinyl siding.

Thanks for any advice. Cut and bend the drain tab. Install lengths of j channel along the inner edge of the fascia. In from each end and deeply score the inner cutting line with a utility knife.