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 Table 4.

Stud Walls
Stud walls generally require no special preparation for horizontal siding installation. Siding should be nailed into studs at maximum 24 in. centers when applied over wood based, solid sheathing and 16 in. on center when applied without sheathing. In those areas where an air space between siding and sheathing is desired, nail siding to furring strips (Table 4).

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 in. into solid wood (Table 4).



Table 4. Lumber Size and Spacing for Blocking and Furring

	Minimum Lumber Size (in.)	Maximum Center-to-Center Spacing (in.)
Blocking	2x2	24
Furring over Sheathing	1x2	24
Furring over masonry walls	2x2	24