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Even where layering is permitted, using a new layer of shingles over the old should be thoroughly thought about on the basis of its advantages and disadvantages: The main argument versus laying extra layers of asphalt shingles is that the roof products can get too heavy for the underlying roofing system framing.


It is often stated that a triple layer of asphalt shingles is equal to a single layer of slate shinglesan extremely heavy kind of material. Another issue with shingling over existing shingles is that you are essentially duplicating some of the surface irregularities that may already be present. If Try This considering placing on a brand-new roof, there's most likely an excellent opportunity that you may have bubbles, bumps, and waves that need to be remedied.
One way to lessen this issue is to go over the old roof and proper as numerous problems as you can before re-roofing. It doesn't take a lot more than a hammer, some roofing nails, and a handful of shingles to correct bumps, gaps, and extending nails. The primary advantage of layering is that it lowers the work involved.
This isn't a real issue if roofing professionals are dealing with the jobthey can strip most roofs in a morningbut if you're getting the job done yourself, it can be a strong argument for roof right over the old roofing. Expense Considerations Several elements go into the cost of a roofing system, beginning with your option of roof materials (ranging from inexpensive three-tab asphalt shingles as much as architectural shingles or even slate).

Rock-bottom, a three-tab composite roofing system for a small home might cost just $7,000. Nationally, a common roofing system using architectural asphalt shingles costs in between $3. 50 and $5. 50 per square foota expense that consists of all demolition, license fees, waste disposal, and clean-up. Typical average costs of various roof choices: $7,000 to $12,000 $9,000 to $15,000 $11,000 to $20,000 $8,000 to $14,000 $10,000 to $15,000 $14,000 to $25,000 $14,000 to $25,000 $15,000 to $28,000 $23,000 to $30,000 $25,000 to $50,000 $20,000 to $40,000 $25,000 to $50,000 Think About Off-Season Roof Work A well-coordinated roof team is an incredible thing to watchand this is why we pay them to do our roofing systems.