What is typically done to ensure shingles are securely fastened to the roof?

Using nails with large heads is a common practice to ensure shingles are securely fastened to the roof. The larger heads on these nails provide a greater surface area that can grip the shingles effectively and prevent them from lifting due to wind or moisture. This is crucial in roofing applications because the stability of shingles is essential in preventing leaks and ensuring the longevity of the roof.

Additionally, using nails with larger heads minimizes the risk of the nails pulling through the shingles, which could happen with smaller nails, especially under adverse weather conditions. Good fastening technique, including the use of appropriately sized nails, is key in maintaining the integrity of the roofing system over time.

This approach also complements other fastening methods, such as applying adhesive, though relying solely on adhesive could lead to issues if the adhesive fails or if extreme weather occurs. Gravity alone is not a reliable means of securing shingles as it does not actively hold them in place against forces such as wind. Hence, the use of nails with large heads is a more effective and reliable method for securing shingles to the roof.