The Ontario Building Code | Materials for Flashing
9.20.13.1. Materials for Flashing
(1) Materials used for flashing shall conform to Table 9.20.13.1.
(2) Aluminum flashing in contact with masonry or concrete shall be effectively coated or separated from the masonry or concrete by an impervious membrane.
Table 9.20.13.1.
Flashing Materials
Forming Part of Sentence 9.20.13.1.(1)
| Item | Column 1 | Column 2 | Column 3 |
|
| Material | Minimum Thickness, mm |
|
|
|
| Exposed Flashing | Concealed Flashing |
| 1. | Aluminum | 0.48 | — |
| 2. | 0.46 | 0.46 | |
| 3. | copper or aluminum laminated to felt or kraft paper | — | 0.05 |
| 4. | Hot dipped or galvanized steel | 0. 33 | 0.33 |
| 5. | Lead sheet | 1.73 | 1.73 |
| 6. | Polyethylene | — | 0.50 |
| 7. | Roll roofing, Type S | — | standard |
| 8. | Zinc | 0.46 | 0.46 |