September 2017

Rooftop-mounted photovoltaic (PV) system installations are increasingly popular in the U.S. Mounting PV systems on rooftops instead of on the ground secures the technology from passersby and preserves buildings' aesthetics. However, to minimize the risk of leakage or reduced roof system performance, a roof system's function, design and performance must be considered before a rooftop-mounted PV system is installed.

Many commercial roof system designers use ASHRAE 90.1, "Energy Standard for Buildings Except Low-Rise Residential Buildings," to demonstrate compliance with applicable energy-efficiency requirements. The most recent version, ASHRAE 90.1-2016, provides updates that include climate zone data that affect required R-values and air leakage and skylight provisions.

After a fire nearly destroyed a historical tabernacle in Provo, Utah, the community rebuilt the structure as the Provo City Center Temple. Utah Tile and Roofing Inc., Salt Lake City, was selected to install the temple's new slate roof system and associated waterproofing, sheet metal and copper details.

Marijuana use remains illegal under federal law, yet some states have deemed recreational marijuana use legal and many more have deemed medical marijuana use legal. Roofing contracting company employers must be able to navigate the conflict between state and federal law while taking action to maintain drug-free workplaces.

Roofing contractors help homeowners understand how a roof system’s performance benefits a house, but many homeowners may not realize the benefits of adding color to a roof system. Color increasingly is a consideration for homeowners and an opportunity for roofing contractors to help their customers create roof systems that deliver superior performance while boosting a home’s curb appeal.