Gallons Per Square Foot Of Roof

Outside of the u s a degree angle is typically used.

Gallons per square foot of roof.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. It is often compared to slope but is not exactly the same. 248 7 48 33 sq. 6 depth double.

At 12 of depth or 66 sq. 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. The collectable rainwater from the roof can be calculated in gallons using this calculator based on the rainfall and area. Gallon to square feet calculator.

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. 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. In those instances you need to break the area down into smaller rectangles. Code to add this calci to your website.

What about non rectangular areas. To calculate the runoff from any given rainfall. 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. The answer is about 623 gallons.

Example roof and and design. Using a 10 000 sq. So a 50 x 20 roof is 600. 400 sq foot roof x 62 248 gallons.

Conversion between gallon and square feet. 400 square foot roof draining to 1 raingutter downspout. Take the dimensions of the footprint of your roof and convert them to inches. For instance an l shaped surface can be broken into 2 smaller rectangles see illustration below.

Rainwater can be collected from the roofs using the rain water harvesting method. How do i calculate square footage. With a cedar roof make sure you pre wet the roof down with water first. Or 0312 gallons per minute sq.

Take a guess what is the volume of water that runs off a 1 000 square foot roof during a 1 rain storm. Step 3 multiply the cubic feet by the amount of water per cubic foot which is 7 48 gallons. Square footage is based on multiplying the length of an area x width of that area. 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.

So with a 5 000 sq. However a good starting point in my experience is 1 gallon of roof mix covers 100 sq. Roof i use about 50 gallons of mix.