How to Estimate Wall Framing Materials
Measuring out the materials needed for wall framing depends on the wall being framed. For a single straight wall, framing requires studs, a bottom plate, and two top plates. As you progress into walls with doors or windows, the addition of header material affects the estimate. When framing multiple walls, the areas where walls meet, such as exterior corners and interior walls adjacent to the exterior wall, require additional stud materials. Understanding how to figure for the differences makes the process of estimating the materials necessary to frame walls less complex. Does this Spark an idea?
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Things You'll Need
- Tape measure
- Building plans
- Calculator
- Pencil
- Paper
- Clipboard
- Construction calculator
Instructions
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The Measurements
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1
Obtain the measurements for the wall(s). Using building plans, use the scale to determine the appropriate length. If you're a do-it-yourself (DIY) installer without professional plans, measure the length of the wall's proposed location. Write the measurements down, and label them "Perimeter."
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2
For the bottom wall plate on a concrete slab, treated lumber is used, and the measurement for the board feet of treated lumber needed is the perimeter length; write it down, and label it "Bottom plate." Standard homes use 2-inch by 4-inch lumber for the bottom plate, top plates, and studs for the wall on a concrete slab. Multiply the perimeter length by two for the board feet needed for the top plates; write the length down labeled "Top plates." For walls on raised wooden foundations, use the perimeter measurement for the wall(s) and multiply by three. Write the measurement down as "Wall plates."
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3
From the plans, determine the number of windows and doors in each wall. The DIY installer without plans should determine how many doors and windows are in the wall. For each window and door under 4 feet in width, four studs are needed along with header material for the rough openings. For doors and windows over 4 feet in width and up to 7 feet, six studs are needed for each, along with header material. Write the number of studs needed down. Add the width of the openings and write down the total.
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4
Where the wall or walls meet another wall, either at a corner or other junction (adjoining), four studs are needed. This covers the studs at the corner or junction for each wall. Write the number of studs needed for corners and junctions down.
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5
Divide the perimeter measurement on a construction calculator by 16 inches (or 1 foot and 4 inches); round the answer up to the next whole number. Write this down, and label it "Studs."
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6
Order materials using these measurements. Plates should be ordered in 16-foot lengths. Studs for standard 8-foot walls can be bought pre-cut; order the number counted for the doors, windows, and wall(s). For the header, use the total length measurement of the windows and doors to determine material. Remember that door and windows under 4 feet are 3 inches longer than the opening; those over 4 feet are 6 inches longer.
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Tips & Warnings
These instructions are a guide. Always allow for waste in planning because exact measurements are never enough. There will always be waste.
Always measure twice, and double-check your figures before ordering material. Finding mistakes beforehand is always best.
