What is the width of the smooth area, known as selvage, in double-coverage roll roofing?

The width of the smooth area, known as selvage, in double-coverage roll roofing is 19 inches. This selvage is important because it provides the overlapping area necessary for ensuring that the roofing is watertight. When applying double-coverage roll roofing, the selvage creates an additional layer that helps prevent leaks, especially in areas subjected to inclement weather.

In roofing applications, proper dimensions are critical for effective sealing and durability, which is why the correct width of the selvage is specified. Understanding the function and size of the selvage is essential for carpenters and roofers to ensure a proper installation that stands up to environmental stresses. Other measurements, while they may be found in different roofing products or applications, do not apply directly to the standard measurements associated with double-coverage roll roofing.