In high wind areas, what is the maximum spacing for nailing underlayment?

In areas subject to high winds, proper installation of underlayment is crucial for ensuring the integrity of the roofing system. The maximum spacing for nailing underlayment is generally set to prevent the underlayment from lifting or becoming dislodged due to strong gusts.

In this context, the maximum spacing of 36 inches for nailing underlayment is specified as it provides a balanced approach to maintaining both stability and performance. Closer nailing can better secure the material, reducing the chance of wind uplift and enhancing the overall durability of the roof. Higher wind resistance is achieved by adhering to this guideline, as it effectively minimizes potential vulnerabilities in the roofing system.

If the spacing were greater than 36 inches, such as 48 inches or even higher, the risk of the underlayment becoming loose or failing during high-wind events significantly increases. Therefore, maintaining a maximum nail spacing of 36 inches is an important factor in roof construction and repair in high wind areas.