Multiply the result in step two by 1 10 to account for waste.
1136 sq ft how many squares of roofing felt.
If the roof has complicated hips and valleys add another 10 to 25 percent to account for the added area.
Unrolled length that combine to provide over 430 sq.
Roofing felt is sold by the roll.
The first step in a free roofing estimate is measuring the roof dimensions.
It does not matter how you arrive at 100 square feet.
Pitch measurement method 2.
For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches.
Felt roof deck protection.
1 ft x 1 ft.
Of coverage for residential and commercial roofing projects.
This gardner asphalt 15 432 sq.
Keep in mind that the average size of a roof is 1 700 square feet so your total will likely be 10 higher or lower than this figure.
The average roll of 15 pound roofing felt covers about 400 ft 2 or 4 squares while the average roll of 30 pound roofing felt covers about 200 ft 2 or 2 squares.
100 square feet 1 roofing square 9 290304 cubic meters si unit.
If this distance measures 4 inches you have a 4 in 12 pitch.
It is often compared to slope but is not exactly the same.
Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30.
You will need to express this size in terms of square feet.
Felt has a 36 in.
8 inches and you have an 8 in 12 pitch.
Roofing materials are always specified in squares.
1 roofing square 9 290304 m 3.
Using an international foot of exactly 0 3048 meters length.
10 feet x 10 feet 100 square feet or 1 roofing square 5 feet x 20 feet 100 square feet or 1 roofing square 2 feet x 50 feet 100 square feet or 1 roofing square 50 feet x 50 feet 2500 square feet so 2500 100 25 roofing squares.
Outside of the u s a degree angle is typically used.
On a ladder beside the roof place the level a foot or so up the roof hold it level and measure from the 12 inch mark on the level s bottom straight down to the roof.
This felt will help prevent damage to your roof from wind driven rain and water from other sources.
Round up to convert square feet to squares.
One square is equal to 100 square feet.
10 feet by 10 feet 100 square feet.
Width and a 144 ft.
Bundles of roofing material per square.
How many rolls of felt will you need.
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.
Product may vary by store.
Asphalt saturated material for excellent waterproofing.
Get the square footage of roof and divide it by 100 and it will give the number of squares you need and for every decimal number over 3 buy a bundle to achieve the amount of material.
For residential and commercial use.
Divide the result from step 3 by 100.