First remove the corner piece then slide the zip tool under the siding and loosen it up.
How to replace corner piece of vinyl siding.
Cut a piece of flashing out of felt paper and install it at the bottom corners of the windows before you install the side j channels.
Overlap the flashing onto the row of siding just below the window.
With damaged wood corner pieces you simply remove the damaged piece and replace it with a new one.
Hgtv expert henry harrison shows how you can reattach it using a vinyl siding removal tool also known as a zip tool.
Install 1 2 inch 12 7 mm foam sheathing strips on both sides of each corner then install your corner siding pieces to these strips.
Step 1 slide the vinyl siding removal tool just under the bottom lip of the uppermost piece of vinyl siding and pry gently upwards.
The corner posts should run from 3 4 inch 1 9 cm below the bottom of the starter strip to just beneath the eaves after the soffit pieces have been installed.
You can t do that with vinyl corner pieces.
Be careful because older siding can become brittle.