Nails
Each Certi-label™ shake or shingle should be applied with two corrosion-resistant fasteners, such as stainless steel (type 304 or 316), hot-dipped zinc coated,(ASTM A 153/A 153 M) or aluminum nails or other fastener as accepted by your local building official. Minimum nail lengths are shown in the fastener chart on the left.

Note: The CSSB does not recommend the use of electro-galvanized (EG) fasteners.

Staples
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™ shake or shingle with the staple crowns 7/16" minimum horizontal, maximum 3/4" horizontal, to the
Certi-label™ shake or shingle butt. Staples are driven in the same location as nails relative to the sides and overlapping butt line. Staples 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™ shake or shingle.

Important Note:
Underdriving or overdriving any fastener will affect the integrity of the roofing system.

Certi-Guard® (fire-retardant-treated) or Certi-Last® (preservative-treated) shakes and shingles:
ALWAYS ask the treatment company which fasteners are recommended for use with their pressure treated
Certi-label™ shakes or shingles. Some fasteners are not compatible with treated materials.