How Much Roofing Felt Will I Need

If you have a simple gable roof you ll only need to measure and sum up the 2 planes of the roof.

How much roofing felt will i need. An important part of any roofing repair or replacement project is being able to accurately calculate the quantity of roofing materials required to finish the job. 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. This free roofing calculator estimates the area of a roof and the amount of materials required to replace or build said roof. Once you know this number you can estimate the final price of the materials.

While the average lifespan for a typical roof can be 15 20 years a long hard winter or a particularly intense storm can cause lasting damage to a roof. Find the square footage of the roof. Roofing felt is sold in rolls and the product label will give information on the area contained. 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.

Divide the area of your roof by the area of the felt rolls you plan to use and allow an approximate 10 extra for waste. These thick layers of roofing felt are installed by heating the back of the felt with a butane torch and then carefully applying it to the roof. How many rolls of felt will you need. As a result you might need to calculate an estimate of how much it will cost to replace your old roof with a new one.

Installing the roofing felt does take care but can go very quickly. How much roofing felt do i need. 1square of roofing covers 100 square feet of roof a bundle is 1 3 of a square. Over time that damage could really add up.

For example you will need to figure out the exact number of shingles required to cover the entire roof area. Roofing felt also known as tar paper is a roll of felt coverage is often used when constructing a roof. You need to be able to calculate the area to be covered and allow for overlap. It provides extra waterproofing to protect the wood until shingles are installed.

Explore a number of housing related calculators as well as hundreds of other calculators covering topics such as finance math health fitness and more. Measure the length and width of each portion of the roof multiply length by width for each plane and then add the planes together for the total square footage. Rolls of felt are 36 wide x 144 long for 15 and 72 long for 30. Anyway calculate the area plus overlap in square metres and that number will be the same as the length of 1m wide roofing felt that you ll need.

In order to know the appropriate amount of roofing felt to use the roof pitch will need to be calculated first.