NRCA is seeking the best young roofing talent in the U.S. to represent Team USA! Learn more.

Glossary

Search for roofing terms


SEARCH RESULTS

  
        
        
Term Description
Equiviscous temperature (EVT) for asphalt The recommended EVT for roofing asphalt (ASTM D312, Type I, II, III or IV) is as follows:
    mop application: the temperature at which the asphalt’s apparent viscosity is 125 centipoise.

    mechanical spreader application: The temperature at which the asphalt's apparent viscosity is 75 centipoise. Note: To avoid the use of two kettles if there are simultaneous mop and mechanical spreader applications, the EVT for mechanical spreader application can be used for both application techniques.
Advertisement

Subscribe for Updates Join 25,000+ roofing professionals following NRCA

Subscribe to NRCA