How To Figure Roof For Shingles

The difference is in the amount of ridge capping you need and the amount you will waste.

How to figure roof for shingles.

Roof length measured in feet roof width measured in feet roof pitch. Measure the pitch of your roof in the attic. From the 1 ft 0 30 m spot you marked on the level measure upward to the rafter. The pitch of the roof is the rise over a 12 inch run.

Use our roof pitch calculator to find the pitch of your roof. When figuring the amount of shingles needed to roof a house you first convert the total square footage of the roof to squares a square represents 100 square feet of area covered by shingles. Singles are often sold in bundles with three bundles equaling one roof square. 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.

A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally. Divide the total footage by 100 to determine the number of squares in the. For example a 4 12 pitch roof that is 100 square feet. Mark a length of 1 foot 0 30 m on a long level starting from one end.

To accurately calculate the area of your roof you must first determine its slope or pitch. Hold the end you measured from against the bottom of a rafter so it s sticking straight out horizontally and is level. You will then have to get the measurement of the rake of the roof. Roof type either gable or hip using these four inputs you will get several basic outputs.

This roof shingle calculator requires four basic inputs. To do this you need to note that one tab will be equal to 1 foot. Roof area measured in sq ft number of squares. Measure your roof accurately use a measuring tape preferably 50 or 100 feet long and get exact ground dimensions of your house.

Determine the bundles of shingles. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. 100 1 054 105 4ft 2. The number of squares determines the amount of shingles needed.

Find the square footage of the roof. A hip roof s square footage is equal to that of a gable roof with the same dimensions. Place the end hook of the tape on the corner and run it all the way to the opposite corner of the house. Roof pitch area multipliers.

For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. If the existing shingles are standard 3 tab shingles you can get this measurement by taking note of the number of tabs along the eaves and ridges then determine the length in feet. Next multiply the footprint of the roof by the multiplier below for your roof pitch to find the overall roof area. Outside of the u s a degree angle is typically used.

Hip roof asphalt shingles calculator calculate the amount of asphalt or fiberglass shingles needed to cover a hip roof.