How to Guide

Wall Construction
ENGINEERED WOOD CONSTRUCTION GUIDE
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FORM NO. B360P
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© 2011 APA – THE ENGINEERED WOOD ASSOCIATION
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WWW.APAWOOD.ORG
50
Leave 1/8" spacing and caulk vertical joints unless otherwise
recommended by siding manufacturer
Building paper or other code-recognized weather-resistive
barrier required
APA RATED SIDING (lap siding), maximum width 12".
Minimum headlap 1".
FIGURE 10
APA STURD-I-WALL (Horizontal Lap Siding Installation)
(a)
6" minimum clearance, siding to grade
1-1/2"-wide starter strip, thickness to match lap siding
(a) For engineered shear wall segments or wall bracing requirements, use APA Rated Sheathing
for wall sheathing under lap siding (see Figure 12). Other methods permitted by model building
codes for braced wall segments may also be used.
1/8" spacing is recommended at all edge and end joints
unless otherwise indicated by panel manufacturer
Building paper or other code-recognized weather-resistive barrier required
APA RATED SIDING panels applied over sheathing
FIGURE 11
APA RATED SIDING (PANEL SIDING) OVER WOOD STRUCTURAL PANEL SHEATHING
6" minimum clearance, siding to grade
Panel siding or APA RATED SHEATHING meets code requirement for wall bracing
Leave 1/8" spacing and caulk vertical joints, unless otherwise
recommended by siding manufacturer
Building paper or other code-recognized weather-resistive barrier required
APA RATED SIDING (lap siding), maximum width 12". Minimum headlap 1".
FIGURE 12
APA RATED SIDING (LAP SIDING) OVER WOOD STRUCTURAL PANEL SHEATHING
6" minimum clearance, siding to grade
1-1/2"-wide starter strip, thickness to match lap siding
APA RATED SHEATHING meets code requirement for wall bracing
Siding joints, if staggered may occur away from studs with nailable sheathing