PART 9 — HOUSING AND SMALL BUILDINGSUpdated for the 2024 Ontario Building Code
Try BUILDAiD Beta
9.29.6.1.Thickness
(1) Except as provided in Sentences (2) and (3), the minimum thickness of plywood interior finish shall conform to
Table 9.29.6.1.
(2) A manufacturing tolerance of –0.4 mm may be applied to the thicknesses listed in Table 9.29.6.1.
(3) No minimum thickness is required where plywood is applied over continuous backing.
Table 9.29.6.1.
Thickness of Plywood Interior Finish
Forming Part of Articles 9.29.6.1., 9.29.6.2. and 9.29.9.2.
Minimum Thickness, mm(1)
Maximum Spacing of Supports, mm o.c. On Supports with Blocking at Vertical Intervals
On Supports with no Horizontal Blocking
not Exceeding 1.2 m
400 4.7 4.0
600 8.0 4.7
Notes to Table 9.29.6.1.:
(1) Thickness limits shall apply to the net effective thickness (NET) of grooved, striated, textured and/or embossed panels and to the
actual thickness of flat panels.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
Understand this provision in seconds
BUILDAiD Assist explains any article of the building code in plain English — with exact citations, exceptions and related requirements.
Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.