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PREPARATION | WALL CONSTRUCTION
| Like all siding materials, Western Red Cedar performs best when installed properly on a suitable frame. Cedar siding should be securely nailed to framing members, furring members or to blocking between framing members. Lumber sizes and spacing for blocking and furring are shown in the table below. |
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Stud Walls
Stud walls generally require no special preparation for horizontal siding installation. Siding should be nailed into studs at maximum 24" (61cm) centers when applied over wood-based, solid sheathing and 16" (41cm) on center when applied without sheathing. In those areas where an air space between siding and sheathing is desired, nail siding to furring strips.
For vertical siding installation, stud walls require horizontal blocking lines or furring strips. When applied over wood based sheathing, vertical siding should be nailed to horizontal blocking or other wood framing members not exceeding 36" (91cm) on center when face nailed or 32" (81cm) on center when blind nailed. When installed without sheathing, vertical siding should be nailed to wood framing or blocking members at 24" (61mm) on center. Check your local code to verify requirements.
Masonry Walls
Masonry walls require furring strips for horizontal and vertical siding installation. Furring strips must be thick enough to allow for nail penetration of 1-1/2" (38mm) into solid wood. Check your local code to verify requirements.
Lumber Size and Spacing for Blocking and Furring*
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Minimum
Lumber Size
(inches)
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Minimum
Lumber Size
(mm)
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Maximum Center Spacing
(inches)
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Maximum
Center Spacing
(cm) |
Blocking |
2 x 2 |
51 x 51 |
24 |
61 |
Furring over Sheathing |
1 x 2 |
25 x 51 |
24 |
61 |
Furring over masonry walls |
2 x 2 |
51 x 51 |
24 |
61 |
* Lumber sizes are nominal |
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