Frequently Asked Questions (FAQs)
1. What nails should be used for roofing?
For slate, ceramic, or asphalt shingle roofs in coastal climates, stainless steel nails are recommended. Galvanized nails are suitable for asphalt roofing shingles.
2. Should roofing nails be exposed?
Ideally, roofing nails should not be visible on the roof. They should be installed flush with the shingle they are inserted into and covered by the shingle above them. This ensures their security and prevents them from being seen.
3. Are screws or nails better for roofing?
The choice between screws and nails for roofing depends on the specific circumstances. Nails are typically used when joined surfaces are more likely to slide, while screws are preferred for areas that are more likely to pull apart or for replacing nails in existing holes.
4. What size nails do roofers use?
Roofers typically use nails with a minimum shank diameter of 11 or 12 gauge and a minimum head diameter of three-eighths of an inch. The length of the nails should be at least 1¼ inches, and for roof-overs, a recommended length of at least 2 inches.
5. Are roofing nails supposed to go through the plywood?
Roofing nails should penetrate at least 3/4 inch into wood decks or just through the plywood decks. It is important to drive the nails flush with the surface of the shingle to avoid damaging the shingle.
6. How many roofing nails for 200 sq ft?
Typically, it is recommended to use four nails per shingle in the main area of the roof and five nails per square in the first row of roofing. This translates to an average of 320 nails or 100 square feet. In high wind areas, it is advisable to use five nails per shingle, totaling around 480 per square.
7. Why do contractors use nails instead of screws?
Contractors often choose nails over screws for large construction projects due to their lower cost and shear strength. Nails provide the ability to withstand shear pressure, where two surfaces slide past each other.
8. How deep should roofing nails go?
Roofing nails should have a minimum length of 1¼ inches, or at least 2 inches for roof-overs. They should penetrate the roof deck by three-fourths of an inch to ensure proper installation.