Tech Today

Keeping current with ratings

Making a roof assembly compliant with fire- and wind-resistance ratings typically is critical to satisfying requirements of project specifications, contracts and building codes. However, determining the ratings for specific roofing products and assemblies often is difficult.

This month, I briefly will review the information regarding fire- and wind-resistance ratings that is available to roof assembly designers and explain some of the limitations of that information and the need for additional information.

UL directory

Underwriters Laboratories (UL) Inc. annually publishes its Roofing Materials and Systems directory, which includes detailed descriptions of roof assemblies that satisfy UL's requirements for listings or classifications. The 2004 edition addresses 20 categories.