Hi,

I want to find out what is the proper/best way to replace current siding with vinyl:

1. remove all existing old siding, repair any rotten damage, put on a new layer of water barrier and then install vinyl siding.

2. same as #1 except put on a layer of 3/8" foam board before installing vinyl siding.

3. repair any rotten damage, put on a 1/4" foam board on top of the original siding and then install vinyl siding.

Please advise.

Best regards,
tohd