Zenith Roofing Services, INC replaces most roof systems for Flat roofs, pitched roofs, and mansard roofs. These include roof systems such as composition shingles, Concrete tile roofs, clay tile roofs, two piece clay tile roofs, slate, presidential shingles, TPO, PVC, Torch down Modified Bitumen, Standing Seam Metal.
A good rule of thumb is if your roof is leaking at the ¾ of the life expectancy mentioned above, we recommend replacing. If it is below the ¾ life expectancy mark, then we recommend repairing it, but to begin budgeting for a new roof.
Roof life expectancy can vary widely depending on the region you live in. In San Diego county and the greater Southern California area, the average life expectancy for a new roof is approximately 30 years.
|Roof Type||New Roof||Over Existing Roof|
|Architectural Shingle Roof||30 years||15 years|
|3 Tab Shingle Roof||20 years||10 years|
|Concrete Tile Roof||30 years|
|TPO Roof||30 years|
|PVC Roof||20 years|
|Built-Up Roof||20-30 years, until you have to restore your roof with coatings or maintenance around penetrations. With proper maintenance and restoration Built up roofs can last up to 50 years|
|Modified Bitumen Torch Down Roof Single Layer||10-15 years|
|Modified Bitumen Torch down Roofs Double Layer or Two-Ply||20-40 years until you have to restore your roof with coatings or maintenance around penetrations. With proper maintenance and restoration 2 layer torch down roofs can last up to 40 years until replacement.|