The Ontario Building Code | Installation
9.14.3.3. installation
(1) Drain tile or pipe shall be laid on undisturbed or well-compacted soil so that the top of the tile or pipe is below the bottom of the floor slab or the ground cover of the crawl space.
(2) Drain tile or pipe with butt joints shall be laid with 6 mm to 10 mm open joints.
(3) The top half of joints referred to in Sentence (2) shall be covered with sheathing paper, 0.10 mm polyethylene or No. 15 asphalt or tar-saturated felt.
(4) The top and sides of drain pipe or tile shall be covered with not less than 150 mm of crushed stone or other coarse clean granular material containing not more than 10% of material that will pass a 4 mm sieve.
9.14.4. Granular drainage Layer
In Plain Language
Foundation drainage pipe must be installed as set out in this article, covering slope, connections, and placement needed for it to function properly.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.