How Much Roof Coating Do I Need

In order to estimate how much roof paint you ll need first you need to estimate the total square footage of your roof s surface.

How much roof coating do i need. One gallon will cover 50 square feet of foam or modified bitumen roofing concrete or bonded tar and gravel roofing. A flat roof and other shapes would work well with this coating type. Roof coating systems are designed around dry film thickness coverage rates or gallons per 100 square feet are the determining factor in the finished thickness of the coating system. Just measure the length and width of each plane on the roof including dormers.

Knowing the square footage of your roof helps determine how many pails of elastek coating you will need. Measure the length and width of the roof to determine the size in square feet by using the following formula. And don t forget that the typical acrylic roof only lasts about 3 5 years before a recoat is required. Add the 2 areas 100 200 300 sq ft to get a total.

How much roof coating do i need. Roof slope and cost flat roof coating typically involves coating over pre existing roof system such as a metal roof. How much roof coating do i need. When you include accessory products such as patch compound fabric and sealer the cost of an acrylic coating really adds up.

Flat roof coating for materials will cost around 1 50 3 50 per square foot and 0 50 3 per square foot for labor. For all three products allow one gallon of roof coating for every 80 square feet of corrugated metal roof or 100 square feet of smooth metal roofing. You ll need 1 gallon of primer and 2 4 gallons of acrylic roof coating for every 100 feet. This maintenance typically comes in the form of coating the flat roof.

Hunker may earn compensation through affiliate links in this story. Length x width square feet a good rule of thumb is that every 100 square feet of roof equals one gallon of coating. Generally we highly recommend the topps seal water free elastomeric roof coating for various reasons. Sloped roofs are usually tiled or asphalt shingle where complete coating is not recommended.

For areas where you will not apply product subtract that area from the total. Highly porous concrete roofs may require more coating for proper coverage. While it is possible to estimate the amount of necessary materials using only the total roof area measurement as can be seen from the table depending how large the pitch of the roof the actual area of the roof can differ by up to 2 236 from the measured total area at a pitch of 24 12. Even more so than other roofs flat roofs require maintenance in order to last.

By annie walton doyle updated september 7 2018.