It is good to replacing whole roof if it has two or more layer of roof. If your roof has only layer than re roofing is not much required but for more than two roofs you should go with re roofing. Roof having two layers need nails of length more than 2 inches which does not found easily and also not safe to use. Therefore most of the roofers prefer to suggest re roofing which gives a health roofing shield to your house and stay longer.
Bob Ketchem
2014-06-30 08:17:49.000000
Is there a question in here?
Most codes do not allow you to roof over with 2-Layers on.