Q:

How do you calculate how many shingles are needed for your building project?

A:

Quick Answer

Professional roofing contractors typically provide estimates of materials needed for roofing, including the number of shingles needed. Simple geometric calculations can provide a rough estimate.

Continue Reading
How do you calculate how many shingles are needed for your building project?
Credit: Andy Sacks Stone Getty Images

Full Answer

  1. Calculate the square footage of the roof

    Multiple the length times width for every flat surface on your roof, including dormers. Add together all the totals to get the total square footage.

  2. Divide the square footage by 100

    Shingles are sold in "squares," which are 100 square foot sections of roofing. Unless you are applying shingles directly to an already existing asphalt roof, you probably also need the same amount of underlayment. Divide the roof's total square footage by 100 to determine the number of squares of shingles needed.

  3. Add an extra 10 percent

    Add 10 percent to your total to make sure you have enough shingles for trim.

Learn more about Carpentry
Sources:

Related Questions

  • Q:

    How many square feet does a bundle of shingles cover?

    A:

    According to builder Mike Guertin in a Fine Homebuilding article, a bundle of roofing shingles contains approximately 33 square feet of shingles. Shingles are sold by the bundle or the square. A square of shingles covers approximately 100 square feet.

    Full Answer >
    Filed Under:
  • Q:

    How do you build a common roof truss?

    A:

    Check with the building project, and plan on how to construct the truss. Measure the size of the roof, and consider the right support and weight of the roof. Determine the roof slope before buying timber panels. Use 2 inches by 8 inches timber panels. Cut the timber panels to fit the roof size before adding a plumb cut at the ends. The plumb cut is a 45-degree angle cut.

    Full Answer >
    Filed Under:
  • Q:

    How do you build garage storage shelves?

    A:

    Building garage storage shelves is an easy project that requires building and assembling the shelving frame and shelves and installing the storage unit onto the wall. The storage shelves can be customized to fit a particular space and they can be stained or painted. For easier results, paint or stain after cutting pieces and before assembling shelves.

    Full Answer >
    Filed Under:
  • Q:

    How do you estimate the cost of installing a concrete pad?

    A:

    To estimate the cost of installing a concrete pad, determine and sum the costs of materials, labor and tools needed to complete the project. These cost components vary depending on several factors, including whether you are buying or making the concrete slab, the size and condition of the site, the concrete grade, and whether you are hiring an expert. Websites such as Homewyse.com offer online calculators that make estimating this cost easy and convenient.

    Full Answer >
    Filed Under:

Explore