Estimating for Wallpaper
Plan Before You Buy
It pays to make a generous estimate of your needs when purchasing wallpaper. If you run short during installation and need to order additional rolls, you may not be able to obtain an exact color match. And if you need to patch damaged areas later, you'll be glad to have matching material on hand.
During each printing, manufacturers use fresh batches of colored ink. Each newly mixed batch of color is identified by a run number printed on the package of each bolt of wallpaper. Check that all your bolts have the same number before you even unroll them.
Choosing the proper adhesive is equally important. Be sure to use the adhesive recommended for the type of covering you're installing.
Figuring Your Wallpaper Needs
To decide how much wallpaper you need, first measure the wall or room with a steel tape. Use a notebook to record your figures. You'll want to take the notebook with you later when you're shopping for your wallpaper; this way, you can be sure to purchase the amount you need.
Measure the height and width of each wall( including openings);then multiply the two figures to determine the total area of the wall in square feet. Add the square footage of all the walls to be covered to determine the total area.
After you figure a room's total square footage including openings, deduct 15 square feet for every average-size door or window. For large or unusually shaped openings, measure the height and width of each opening and deduct the exact square footage from your total.
How Many Rolls?
Once you've calculated and recorded the total square footage of wall space to be covered ( with openings deducted), you'll need to determine the number of single rolls of wallpaper needed. The following instructions will give you a more accurate count.
Though priced by the single roll, wall coverings are sold in multiple-roll bolts. Coverings vary in width from 21 it 36 inches, but they have the same total square footage, depending on whether they're standard or European rolls. This means that wider rolls are shorter in length than narrower rolls
A standard single roll contains 36 square feet of material. The cutting and trimming you'll do will deduct about 6 square feet, so figure on 30 square feet of usable wall-paper from each roll you buy.
A European single roll contains 29 square feet. After cutting and trimming, plan on having 25 square feet of usable material per roll.
To figure the total number of single rolls you need, divide the total square footage of wall space by 30 (25 for European rolls) square feet. If you're left with a fractional remainder of square feet, buy an additional roll.