The Ontario Building Code | Number of Layers
9.26.11.6. Number of Layers
(1) Built-up roofing shall consist of at least three mopped-down layers of roofing felt flood coated with bitumen.
9.26.11.6. Number of Layers
(1) Built-up roofing shall consist of at least three mopped-down layers of roofing felt flood coated with bitumen.
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