Can my new roof be layed right over my old roof?

In some cases, no tear-off of the old shingles is needed before installation of a new roof. However, your area's building codes may restrict this practice. Removal of your old roof will offer many benefits such as the ability to install waterproofing materials, an even, new roof line, and discovery of insulation, ventilation, or condensation problems, not to mention roof deck damage itself.

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