Green Building Q&A: New siding over two existing layers
I'm looking to install new vinyl siding. The house was built in the late 40's and has currently has two layers of siding on it. The top layer is cedar board and batten. The second layer is clapboard, but I'm not sure of the material type. I've met with three contractors. One wants to remove both layers while the other two were planning to side over both of the existing layers removing only the batten. The last contractor went back and forth before deciding that siding over both layers would be ok. It seems to be common practice to side over an existing layer over siding. However I can't seem to find any information about installing a third layer of siding. Am I asking for trouble by installing a third layer of siding vs. removing one or both layers of the existing siding?