Copyright Goodheart-Willcox Co., Inc.
270 Section 2 Foundations and Framing
11.15.3 Estimating Wall Sheathing
To estimate the amount of wall sheathing, first find the
total perimeter of the structure, Appendix B. Multi-
ply this figure by the wall height. When the sheathing
extends over the sill construction, measure the height
from the top of the foundation. The product is the
gross square footage of the wall surface. Do not allow
for window and door openings unless they are very
large. Most carpenters sheath over the opening then
cut it out later.
Divide the net area by the square footage per sheet
to determine the number of pieces required. For exam-
ple, if the net area to be sheathed is 1060 sq ft and the
sheets selected are 4′ × 8′, calculate the quantity needed
as follows:
Net area =1060 sq ft
Fiberboard sheet size =4′ × 8′
=32′ sq ft
No. of sheets needed =1060 ÷ 32
=33.1 (round up to 34)
Pro Tip
Problems in estimating, although based on simple
formulas, usually contain so many variables that
good judgment must be applied to their solution. This
judgment is acquired through experience.
Construction Careers
Framing Carpenter
Most of the carpenters employed in residential and light
commercial construction are framing carpenters. They are
sometimes referred to as rough carpenters to distinguish
them from the finish carpenters who do trim and specialty
work. Framing carpenters primarily work with wood as
a structural material. They fabricate the floor structures,
wall sections, and roof framing of the building. In recent
years, framing carpenters have become increasingly
involved with the cutting, fitting, and fastening of light
steel structural members (joists and studs), especially in
commercial construction.
Approximately 1/3 of all carpenters are self-employed.
Another 1/3 work for general contractors. The
remaining 1/3 are spread among specialty contractors,
manufacturing firms, government agencies, and other
employers. The growth of manufactured housing
has created jobs for framing carpenters in firms that
prefabricate building sections or entire structures.
Basic skills for framing carpenters are the ability
to make use of measuring devices and to read and
accurately follow construction drawings. They must
be able to efficiently and safely use a variety of hand
and power tools. Framing carpentry is strenuous work,
involving lifting and carrying, standing or kneeling for long
periods, and working in situations where the danger of
injury from falls or other accidents is present. Most of the
work is done outdoors, often in rainy, dusty, cold, or hot
weather conditions. Wearing appropriate clothing and
proper personal protective gear is important.
Framing carpenters acquire their skills in a variety of
ways. Many learn through informal on-the-job training
working with more experienced carpenters. Others
enter the field from vocational school programs or take
part in formal apprenticeship training. A carpentry
apprenticeship typically is 3–4 years in length and
combines classroom training with practical experience
and instruction on the jobsite. Because they are exposed
to most aspects of the construction process, carpenters
who work for general contracting firms have opportunities
for advancement to positions such as foreman, carpentry
supervisor, or general construction supervisor.
Lakeview Images/Shutterstock
Framing carpenters work mostly with structural materials
made of wood. They work on all sections of a building, from
top to bottom. They are trained in the use of hand tools
and power tools, as well as measuring devices.