Use a siding removal tool.
How to install vinyl siding around bay windows.
However vinyl is much easier to remove modify and install than any other type of siding so don t let it deter you if you want to add a new window move a door or build an addition.
Extract nails keeping the vinyl pieces in place in order to prepare vinyl pieces to be removed.
Use this tool by inserting it where a piece of vinyl overlaps a piece below it and then sliding it across until you reach the end of.
Lock the notched.
If it has a nailing fin apply the caulk to the back of the fin.
If your bay window is on the second floor then you should install all of the vinyl on the first floor without any problems.
Place the piece of siding to be installed under the window along the bottom edge and hold it where it will be located.
Cutting and installing the siding 1.
When you come to the bay window place the vinyl siding on both sides as closely as you can and screw it tightly to the wall at the edge of the window.
Do not cut the vinyl off.
When you get to a window you will need to cut sections from the panels directly above and below it to fit.
Complete the corner cuts with a sharp chisel.
Measure the distance from the inside top of the j channel to the locking tab of the course below and subtract 1 4.
Cut a length of drip edge to fit over the top of the window then slide it between the siding and the building paper.
Install siding around windows.
Remove the pieces of vinyl siding from around the window area.
This video shows two ways to trim around bay and bow windows when installing vinyl siding.