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Sheppard Pearl Waterproofing

Member of GTHBA, CHBA (Since 2004)

Roof top ventilation, which is technically attic ventilation [roof vent plus eave vent]. It is a very important element of roofing.

This expansion joint failure was caused by membrane failure (roof top parking area), water penetrate under expansion joint, freeze up and push out the whole expansion joint.

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Roof structures will sometimes “leak [especially winter only]” due to the formation of ice dams. Ice dams are the large mass of ice that collected on the lower edge of the roof or gutters.

Roof and Attic Ventilation

Article 4

Article 5

Car Park Expansion Failure

Ice Dam Backups

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