How Contractors Determine the Price of a Roof Replacement
After
inspecting the roof and speaking with homeowner, a contractor will draw up an
estimate for the project. Estimating takes several important factors into consideration including materials, complexity of the job
and the amount of time needed to complete the job.
Typical Breakdown:
Roof Complexity – A roof with more level changes hips and valleys, and
add-ons, such as dormers, will be more expensive than a simple roof.
Existing Layers – It’s sometimes possible to install over existing
shingles, but this lowers the lifespan and can cancel the warranty. It’s better
to do a complete replacement. The more layers that must be removed will
increase the price.
Debris and Waste Removal – Asphalt shingles, the most common material
used, are considered hazardous waste and must be disposed of properly.
Materials –
The type of new material that will be installed, such as asphalt shingles, steel
shingles, slate shingles, etc.
Building Materials – This covers all other materials needed to replace a roof
including boards and plywood for the roof deck, nails, drop cloths, tarps,
staples, calk, etc.
Roof Underlayment and Accessories –
Underlayment and accessories are part of a system that makes the roof complete
and watertight.
Ventilation – Ventilation is very important for expanding
the lifespan of a roof, increasing its energy efficiency and meeting building
code requirements in some areas.
Labor Costs –
Installation/labor costs will vary depending on the size and complexity of the
job, the workers’ experience and how long the project will take.
Overhead Costs – This covers the basic costs of doing business
(insurance, advertising, taxes, permits, office space, equipment, trucks, office supplies, office staff, etc.).
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