CSLB C-39 Roofing ContractorSteep-Slope RoofingMedium
A roofing crew is installing a new asphalt shingle roof on a home in a region prone to high winds. To enhance the wind resistance of the shingles, in addition to standard nailing, what is a common and effective additional fastening technique recommended by manufacturers, especially in high-wind areas?
- AUsing staples instead of nails for faster installation.
- BApplying a continuous bead of asphaltic cement under each shingle tab.
- CUsing longer nails for all shingles.
- DIncreasing the number of nails per shingle to six.
Show answer & explanationAnswer & explanation
Correct answer: B. Applying a continuous bead of asphaltic cement under each shingle tab.
Applying a continuous bead of asphaltic cement (roofing adhesive) under each shingle tab is a common and effective method to enhance wind resistance, especially in high-wind zones. This creates a stronger bond between shingles.
Why the other options are wrong
- A. Staples are generally not recommended for asphalt shingle installation, especially in high-wind areas, as they have less pull-through resistance than nails.
- C. Longer nails might be used for specific applications (e.g., over insulation), but don't directly enhance tab sealing against wind lift.
- D. While some manufacturers may specify more than 4 nails for high-wind, 6 nails for every shingle is often excessive and not always the primary additional technique.
High-Wind Shingle Fastening
Additional fastening methods are employed for asphalt shingles in high-wind areas to increase their resistance to uplift and prevent detachment.
- Standard nailing patterns are often supplemented.
- Asphaltic cement forms a strong bond between shingle layers.
- Increased nail counts may also be specified by manufacturers.
Memory trick: Wind's howl, shingle's hold, with sealant, brave and bold.