Roof deterioration and impact: A questionnaire survey

08 Feb.,2023


The company has a group of cooperation teams engaged in the LITONG painted aluminium coil, Polyester Powder Coated Aluminium, LITONG industry for many years, with dedication, innovation spirit and service awareness, and has established a sound quality control and management system to ensure product quality.

Roofing is one of the main components of any building and is a relatively large investment (Suarez, 1999). Many studies (for example, NCES, 2003) have identified roofing as one of the most deterioration-prone building components. Therefore, being proactive with the health of a roofing system will ultimately reduce the building financial liability (Suarez, 2005).

The average life of roofs varies by the type and material of the roof (Lewis and Payant, 2000). However, the life expectancy for roofs, like any other building component, is greatly influenced by the presence or absence of a roof maintenance programme (Suarez, 1999). According to the National Roofing Contractors Association, roofs that are not properly maintained will last approximately half of their anticipated normal service life (Suarez, 1999).

Roof systems are generally divided into two categories: low slope and steep slope, as shown in Figure 1. Many studies (Cullen and Graham, 1996; Bailey and Bradford, 2005) have revealed that built-up roof (BUR) systems are the most common roof type in Canada. To facilitate an in-depth investigation of roof defects, this article focuses on BUR systems only. BUR systems have been in use in the United States for more than 100 years. They are generally composed of alternating layers of bitumen and reinforcing fabrics that create a finished membrane. The number of plies in a cross section is the number of plies on a roof. The reinforcing fabrics are also called roofing felts or ply sheets. Roofing felts are reinforced with either glass-fibre mats or organic mats. The bitumen typically used in BUR systems is asphalt, coal tar or cold-applied adhesive. Surfacing for BUR systems include aggregate (such as gravel, slag or mineral granules), glass-fibre or mineral surfaced cap sheets, hot asphalt mopped over the entire surface, aluminium coatings or elastomeric coatings.

With high quality products and considerate service, we will work together with you to enhance your business and improve the efficiency. Please don't hesitate to contact us to get more details of LITONG painted aluminium coil, Polyester Powder Coated Aluminium, LITONG.