Use a sanding block to sand the underside of the patch as well as the side of the damaged corner piece.
How to repair siding corners.
Starting at the bottom and working your way up the corner slip a replacement cap under the bottom edges of the panels.
Add at least 4 inches to that amount.
A screwdriver or cat s paw can also slip under the heads.
Take off the damaged caps.
Make sure that you leave the nailing strips intact.
With a pry bar or pliers remove all the nails underneath.
Cut a piece of corner trim to the length you measured in the previous step with a pair of tin snips.
Measure the length of the damaged area on the corner trim.
Step 3 glue the patch in place.
How to repair the corner trim on vinyl siding 1.
Cut off the nail flanges on both sides of the.
How to repair siding corners first thing that you need to do is to take your utility knife and use it to score both sides of the damaged section starting from the top to the bottom.