Penetration of Fasteners
(1) Fasteners for shakes and shingles shall penetrate through the nail-holding base or not less than 19 mm into the framing.
(2) Fasteners for cladding other than that described in Sentence (1) shall penetrate through the nail-holding base or not less than 25 mm into the framing.
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Article 9.27.5.7. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only