Gallons Per Square Foot Of Roof

How do i calculate square footage.

Gallons per square foot of roof.

With a cedar roof make sure you pre wet the roof down with water first. Square footage is based on multiplying the length of an area x width of that area. For instance if the pool is 3 feet deep 10 feet wide and 20 feet long you would multiply 3 times the product of 10 times 20 to get 600 cubic feet. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches.

Take the dimensions of the footprint of your roof and convert them to inches. 400 square foot roof draining to 1 raingutter downspout. Rainwater can be collected from the roofs using the rain water harvesting method. 248 7 48 33 sq.

6 depth double. Gallon to square feet calculator. To calculate the runoff from any given rainfall. Roof i use about 50 gallons of mix.

Use one gallon for every 50 square feet of bonded tar and gravel roof and for every 50 to 75 square feet of rolled roofing. So a 50 x 20 roof is 600. It is often compared to slope but is not exactly the same. I am referencing the square footage of the roof with pitch factored in not the floorplan square footage.

Code to add this calci to your website. The answer is about 623 gallons. At 12 of depth or 66 sq. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area.

For instance an l shaped surface can be broken into 2 smaller rectangles see illustration below. 400 sq foot roof x 62 248 gallons. What about non rectangular areas. Outside of the u s a degree angle is typically used.

Using a 10 000 sq. Step 3 multiply the cubic feet by the amount of water per cubic foot which is 7 48 gallons. However a good starting point in my experience is 1 gallon of roof mix covers 100 sq. For example a 3 inch per hour rainfall will build up to a 3 inch depth on a flat roof in one hour at the rate of 1 87 gallons per hour sq.

Roof area the 3 inch rainfall will produce 18 700 gallons in one hour at the rate of 312 gallons per minute. While the amount of primer needed per square foot depends on how porous the current roofing is one gallon of primer covers about 50 to 100 square feet on built up roofs asphalt surfaces and modified bitumen roofs. Or 0312 gallons per minute sq. 12 depth a basin or dry stream bed that is approximately 6 feet by 6 feet or a dry stream bed that is 3 feet wide x 11 feet long.

Example roof and and design. So with a 5 000 sq. Conversion between gallon and square feet.