If more than about 35 of your roof is going to need repair due to wind or hail especially if it s already 12 years old the cost effective decision might be to replace it all.
New roof installation time.
Roof shingles are not lying flat.
Repair is costlier on a per square foot basis because it is more time consuming to integrate new shingles into a roof here and there than to install them over the entire roof.
The complexity of the roof.
The more peaks valleys skylights and other obstacles the roof has the higher the installation cost will be.
The shingles on your roof serve a dual purpose.
Ranch homes for example are much easier to roof than tudor or victorian styles.
They give the roof a finished look while forming a protective seal.
The quote includes pulling a permit removing old roof shingles inspecting sheeting boards and replacing boards at 50 00 per 4 x8 sheet or 5 00 per board foot installing new drip edge replacing metal flashing on chimney electrical mast flashing new pipe flashing installing new baffled ridge vent and disposing of all debris.
Lumpy bumpy or curling shingles that do not.
The national average cost to replace a roof is 7 211 with most homeowners spending between 4 707 and 10 460 roof installation cost ranges from 400 to 550 per square depending on the roof size and materials used in reroofing.
The busiest time of the year for most roofing companies is usually late summer through the fall months.