To find your roof’s total square footage:
- Measure the length and width of each plane on the roof (including dormers) then multiply length times width.
- Add the square footage of each of the planes together.
WHAT YOU’LL NEED TO MEASURE A ROOF:
- Ladder
- Measuring Tape
- Calculator
- Pen/Pencil
- Paper
Square Footage
- The first thing you’ll need to measure is the square footage of your roof.
- Position your ladder at the corner of one of your roof planes to determine the length.
- Extend your measuring tape as far as you can along the length of your roof and mark the area.
- Move your ladder down to the next section. Beginning with where you marked the first measurement, measure the next section.
- Continue measuring the length of your roof until you’ve covered the entire length area.
- Write down the final measurement.
- Next, measure the width of your roof plane.
- Use your ladder or your feet to measure the entire width of your roof plane.
- Write down the final measurement.
- Continue steps 1–9 on each of your roof’s planes.
- Multiply the length and width of each plane to get the square footage. Add all measurements to get total square footage.
Slope
- You’ll also need to measure the slope, or angle, of your roof.
- Position your ladder near the top point of your roof.
- With your measuring tape, measure vertically from the top point to the bottom point (the rise).
- Repeat over 12 inches; the result is your slope (e.g., 4/12).
Calculating How Many Tiles You Need for Your Roof
- A ÷ X = D (Number of Tiles Needed for One Row Across the width)
- C ÷ Y = E (Number of Rows Needed)
- D x E = F (Number of Tiles Needed for One Side of the Roof)
- F x 2 = Total Number of Tiles Needed
Can you measure a roof from the ground?
If you’re planning work on a roof and don’t have the building plans, taking preliminary measurements from the ground allows you to approximate the roof area and estimate some costs. You can measure a gable or flat roof from the ground with the help of an assistant.
How do you calculate roof battens?
Measure from the top of the lowest batten to the top of the highest batten, then divide this number by the maximum gauge recommended by the manufacturer, and round this up to the nearest whole number.
Roof battens: Provide a breathable space allowing any condensation to be eliminated. Increase the structural performance of roof truss systems. Enable roofing materials to be secured firmly to the roof. Assist with correct alignment of roofing sheets.
How many bundles of shingles do I need for a 12×12 roof?
Bundles. Asphalt shingles and most other roof shingles are typically available in bundles. For each roofing square or 100 sq ft, you’ll need three bundles of shingles.
How many bundles of shingles do I need for a 10×10 shed?
How many shingles would I need for a 10×10 Gambrel shed roof? – Quora. Well, I did the job myself and the answer is: 5 packs.