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The correct penetration of the wooden roof deck looks like this.
The correct penetration of the wooden roof deck looks like this.
The correct penetration of the wooden roof deck looks like this.
The correct penetration of the wooden roof deck looks like this.
We have to use 30 mm long nails if we are installing thicker shingles like the laminated shingles Cambridge Xpress or Cambridge Xtreme 9,5°. For reroofing (shingle over shingle) or hip and ridge application it is necessary to use minimum 35 mm long roofing nails.
General fastening rules
Proper fastening is essential to a good roof performance. To ensure proper nailing during the shingle application:
- Use the correct type, size and grade of nail as is specified in the application instruction.
- Use corrosion resistant nails.
- Use the recommended number of nails per shingle.
- Position the nails according to the shingle specifications.
- Align the shingles properly before nailing to avoid exposing nails in the course below
- Drive the nails straight and flat with the shingle surface.
- Do not break the shingle surface with the nail head.
- Do not drive nails into knotholes or cracks in the roof deck.
- Repair incorrect nailing immediately.
- Always nail the shingle from one side to the other, so the shingle stays flat on the roof.
- Follow the application instructions concerning special nailing procedures for steep slopes, high wind areas, and any special requirements.
- Comply with local building codes.
If a nail does not penetrate the deck properly and cannot be tapped down to be properly driven, remove the nail, repair the hole in the shingle with bituminous mastic and place another nail nearby. If necessary, replace the entire shingle.
Nailing method and correct location of nails
Take a look at the different nailing locations on the different types of shingles.
