Roof Covering and Deck

A visual inspection of a roof deck or roof covering will indicate its condition, and the adequacy of routine maintenance. A roof's condition can often be observed from the underside or from a roof access hatch. Pitched roof covering condition can often be observed from the ground; however, low-sloped roof coverings need to be observed on the roof. Deteriorating roofs will not be able to resist water ingress or weight stress from hail or snow.

Negative Positive
Steel roof decks showing signs of structural corrosion. Roof decks showing no significant visual signs of duress.
Gypsum or cementitious wood fibre roof decks showing signs of water damage. Perimeter edge metal securely attached to the building.
Perimeter edge metal flashing of low-sloped roofs (without parapets) that is not rigidly secured to the building. Preventative roof maintenance program in use.
Blistering or soft spots indicating wet insulation below the roof cover.  

  • Implement a roof preventative maintenance program. As a minimum include: debris removal; cleaning roof drains, scuppers and gutters; replacing missing drain covers; adding or redistributing ballast; securing loose roof perimeter flashing and securing loose rooftop equipment.
  • Use experienced roofing contractors to conduct an annual roof inspection. Noted deficiencies should be promptly corrected. In high-wind regions, this inspection should be conducted before the high-wind season begins.
  • In high-wind prone regions, consider face-fastening of perimeter edge metal to provide a visually secure connection to the building.

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