Hail Damage To Built Up Roof With Ballast

Every year multiple hail storms cause billions of dollars of property damage.

Hail damage to built up roof with ballast. Severe damage caused by wind and hail damage like this is not uncommon when a combination of large hail projectiles and an intense windstorm combine to inflict serious damage on roofs windows siding and air conditioning units as well as unprotected automobiles and other. That storm dropped a record setting 4 83 inch diameter hailstone in bethune colorado. One special type of built up roofing called ballasted roofing uses large stones about 1 1 2 to 2 1 2 inches in diameter for the surface layer. Built up systems are installed by alternating layers of asphalt or tar and supporting fabrics directly onto the roof.

To speak to one of haag s engineer s about your assignment contact us here or call 800 527 0168 or 214 614 6500. In 2019 the united states experienced 5 396 large hail storms as documented by the noaa severe weather database. One of these storm clusters was a beast of a hail storm in colorado. Commercial and industrial roofs built up roofing polymer modified bitumen roofing thermoplastic single ply roofs pvc and tpo thermoset plastic single ply roofs epdm cspe.

Built up roofs or burs also called a tar and gravel roof is a well established and popular style of flat roof that is made up of alternating layers of roofing felt or fiberglass and asphalt that is applied with heat which combine to make a long lasting sturdy roofing system. Built up roofing or bur systems have been in use in the u s. Assessing hail damage on gravel ballasted built up roofs in this interview with denise johnson ryan chauncey executive director of operations at nelson forensics explains the difficulty of assessing hail damage on gravel ballasted built up roofs and why hail size isn t enough to evaluate damage. In this paper we will define the characteristics of hail damage to built up roofs describe our inspection and testing procedures and.

These roof systems are commonly referred to as tar and gravel roofs. The hail resistance of built up roofs has been known to be substantial especially when covered with loose and embedded gravel in an asphalt flood coat. Ballasted roofs hail ca n remove some of the loose. 2 1 2 threshold size for damage to well supported ballasted built up.

Townhome complex roofs with alleged hail damage. With a ballasted system the lower layers are not adhered or fastened to the roof structure and the heavy surface layer keeps the roofing in place.