Question

Can you determine the size, shape and dimensions of the roof? How?

pls. answer this question
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Answer 1

No I can't determine the size, shape and dimensions of the roof .

Because I can't

Answer 2

Answer:

1. Find the length and width of the building’s exterior walls. Stretch your tape measure along the walls from end to end in both directions. Record these measurements in your notebook. Along with the roof’s pitch, you’ll use these 2 dimensions to calculate the roof’s overall square footage.

• Once you've measured the building’s walls, estimate the length of the overhangs on either side (if your roof has them). The easiest way to do this is to simply eyeball them and approximate how long each one is in feet. Add these figures to your recorded measurements to account for the additional area.
• Estimating the area from ground level is less precise than measuring each side individually, but it can make a quick, easy, and safe alternative when redoing a square or rectangular roof. To measure an irregularly-shaped roof, you'll need to get on top.

2. Calculate the pitch of the roof. The pitch is the steepness of the roof. To find the pitch of your roof, you’ll first need to set up a ladder tall enough to reach it. Place a level against the rooftop a few feet in from the edge and angle it so that the floating bubble is centered, then measure the distance from the end of the level to the surface of the roof.

• Pitch is expressed as “X-in-12 (inches)”. If you’re using a 1 ft (0.30 m) level, the pitch is the distance between the edge of the level and the roof’s surface. A distance of 7 inches (18 cm), for example, would mean your roof has a pitch of 7-in-12.
• If you’re using a 2 ft (0.61 m) level, divide the distance between the level and the roof by 2 to get the true pitch. A 14 in (36 cm) difference, for example, indicates a pitch of 7 in (18 cm).
• The terms “pitch” and “slope” are sometimes used interchangeably when describing roofing projects.

3. Use a pitch multiplier table to determine what figure to use. Pitch multiplier tables make it easy to use a particular pitch to estimate a roof’s square footage. Run a search for "pitch multiplier table" and look for the measurement of your roof’s pitch in inches on the left side of the table. Write down the corresponding pitch multiplier for use in your following calculations.

• For example, a roof with a rise of 3-in-12 will have a pitch multiplier of 1.031, while one with a rise of 8 in 12 will use a multiplier of 1.202.
• You should be able to pull up a number of reliable pitch multiplier tables with a quick Internet search.

4. Multiply the area by the pitch multiplier to get the roof's square footage. First, multiply the length by the width. Then, take the product of these two dimensions and multiply it by your pitch multiplier. The number you get will be an accurate estimate of how much area you have to cover for your roofing project.

• If your roof measures 48 feet (15 m) x 24 feet (7.3 m), multiplying its length by its width would give you a square footage of 1,152 square feet (107.0 m2). If its pitch is 6-in-12 (a pitch multiplier of 1.12), multiplying 1,152 sq ft (107.0 m2) by 1.12 would give you an overall square footage of 1,290 square feet (120 m2).

5. Divide your estimated square footage by 100 to estimate your materials. Roofing materials are bundled in "squares" that contain enough shingles to cover 100 square feet (9.3 m2). Dividing 1,290 sq ft (120 m2) by 100, for example, will tell you that you need to order at least 13 squares to get the job done.

• Always order 10% more materials than you think you need to account for waste, and round up to make sure you don't come up short. In the above example, you'd need 15 squares.

Explanation:

Find this number by measuring the length and width of each plane on the roof (including dormers) then multiplying length times width. To find your roof's total square footage, simply add the square footage of each of the planes together. For example, this shed roof has one roof plane.