The Ontario Building Code | Quantity of Materials
9.26.11.1. Quantity of Materials
(1) The quantities of bituminous materials used on built-up roofs shall conform to Table 9.26.11.1.
Table 9.26.11.1.
Quantities of Bitumen for Built-Up Roofs
Forming Part of Sentence 9.26.11.1.(1)
| Item | Column 1 | Column 2 | Column 3 |
|
| Type of Roof | Amount of Bitumen per Square Metre of Roof surface | |
|
|
| Mopping Coats Between Layers | Flood Coat |
| 1. | asphalt and aggregate | 1 kg | 3 kg |
| 2. | Coal-tar and aggregate | 1.2 kg | 3.6 kg |
| 3. | Cold process roofing | 0.75 L cold process cement | 2 L cold process top coating |
In Plain Language
The quantity of materials used in built-up roofing must meet the requirements set out in this article, ensuring adequate coverage and waterproofing thickness.
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.