How Much Does it Cost to Seal a Roof?

Seal a Roof Costs
Location: National Change Location
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Average reported costs:
$649
based on 201 cost profiles
Most homeowners
spent between:
$525 - $773
Minimum cost:
$150
Maximum cost:
$1,100
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Sealing a roof is common for flat roofed buildings to help protect against moisture and standing water. However, roof sealants can also be applied to sloped or pitched roofs depending on the conditions, weather, and climate. Sealing your roof will help preserve and maintain its life and durability. There are a number of factors that will affect the price of sealing your roof

Type of Sealant

There are a number of different types of roof sealants, each with a different price point and purposes. Light reflective sealants deflect heat and save on cooling costs. Water resistant sealants protect against moisture and leaks. There are also sealants designed to resist anything from corrosion, fire and other threats to your home.

Roof Slope

Most sealants are applied to flat roofs, however if you want to seal your sloped or pitched roof, sealant application will be more expensive. You will pay extra for any treatment or repair to a pitched roof because it is more difficult and dangerous.

Roof Cleaning and Repair

Before you seal a roof you will want to make sure it's in good condition and clean. Sealant will not adhere well to a roof surface that is covered in dirt and debris, and you would not want to seal over a damaged area. Have your roof inspected before sealing it. Any cleaning and repair will add to your costs but are well worth it in the long run.