Technical Specifications

SIDEWALL FASTENER GUIDELINES
YES
Correct - flush
with surface
NO
Underdriven
NO
Overdriven
5
Figure 4: Nail Driving Detail
Figure 5: Course Alignment
Centerline of heart
Knot or
similar defect
1 1/2"
Each Certi-label Western Cedar shingle or shake should be
applied with two corrosion-resistant fasteners, such as
stainless steel (type 304 or 316), hot-dipped zinc coated, or
aluminum nails or other fastener as accepted by your local
building official. Minimum nail lengths are shown in the
fastener chart below. In double course applications, the
exposed Certi-label Western Cedar shingle or shake shall be
face-nailed with two hot-dipped galvanized or stainless steel
casing nails, driven 2" above the butt line, and 3/4" from
each edge. Certi-label Western Cedar shingles wider than
10" require 2 additional nails and these two nails are driven
approximately 1" apart near the center of the shingle.
Staples should be aluminum or stainless steel (type 304 or
316) 16 gauge or other fastener as accepted by your local
building official. Two staples should be driven per Certi-label
Western Cedar shingle or shake with the staple crowns 7/16"
minimum horizontal, maximum 3/4" horizontal, to the Certi-
label Western Cedar shingle or shake butt. Staples are
driven in the same location as nails relative to the sides and
overlapping butt line. Certi-label Western Cedar shingles
wider than 10" require 2 additional staples and these two
staples are driven approximately 1" apart near the center of
the shingle.
Fasteners should be long enough to penetrate into the
sheathing at least 3/4" or all the way through and driven
flush with the surface of the Certi-label Western Cedar
shingle or shake. In all applications, staples shall be
concealed by the course above. Fasteners cannot be electro-
galvanized as they will cause staining. Nails are preferred,
for aesthetic reasons, in sidewall applications using
exposed fasteners.
Nails
Staples
Important Notes:
Certi-Guard (fire-retardant-
treated) or Certi-Last
(preservative-treated) Western
Cedar shingles and shakes:
Underdriving or overdriving any
fastener will affect the integrity
of the Certi-label Western
Cedar sidewall system.
ALWAYS ask the treatment
company which fasteners are
recommended for use with their
pressure-treated Certi-label
Western Cedar shingles and
shakes. Some fasteners are not
compatible with treated material.
The information on this page is
not meant for use with sidewall
panel applications. Please
contact the manufacturer for
specific panel fastener details.
Product Type Nail Type & Minimum Length
Certigrade, R&R and
Sanded Shingles Type (in)
16" and 18" Shingles 3d Box 1 1/4
24" Shingles 4d Box 1 1/2
Certigroove Shingles Type (in)
16" and 18" Shingles 3d Box 1 1/4
24" Shingles 4d Box 1 1/2
Certi-Split & Certi-Sawn Shakes Type (in)
18" Straight-Split Shakes 5d Box 1 3/4
18" and 24" Handsplit Shakes 6d Box 2
24" Tapersplit Shakes 5d Box 1 3/4
18" and 24" Tapersawn Shakes 6d Box 2
Single Course Sidewall Fasteners
Product Type Nail Type & Minimum Length
Certigrade, R&R and
Sanded Shingles Type (in)
16", 18" and 24" Shingles 5d Box 1 3/4
or same size casing nails
Certigroove Shingles Type (in)
16", 18" and 24" Shingles 5d Box 1 3/4
Certi-Split & Certi-Sawn Shakes Type (in)
18" Straight-Split Shakes 7d Box 2 1/4
or 8d 2 1/2
18" and 24" Handsplit Shakes 7d Box 2 1/4
or 8d 2 1/2
24" Tapersplit Shakes 7d Box 2 1/4
or 8d 2 1/2
18" and 24" Tapersawn Shakes 7d Box 2 1/4
or 8d 2 1/2
Double Course Sidewall Fasteners
Wide Shingle Fastener Detail
1
2
3 4