Physics Engineering Hail Second Layer Roof

Hail damage to roofing materials is defined as an identifiable mark caused by hail that has measurably reduced the integrity or functionality of the overall material where the material was sound prior to the hail impact.

Physics engineering hail second layer roof.

From an engineering perspective hail with sufficient mass hardness and impact energy can dent or rupture tear metal roofing materials. The membrane to a layer of polyisocyanurate polyiso insulation using an adhesive between the top of the insulation and the underside of the roof membrane to bond these layers to each other. Too many commercial properties make the mistake of not replacing their roof soon enough since severe wind and hail events don t happen every day. Hail large enough in size possessing sufficient impact energy great enough to change the appearance of the roof panels with the hail caused dents resulting in no micro fractures or loss of coatings.

When a hailstone impacts a fully adhered single ply roof system it is possible for the impact force. In extreme instances hail may puncture the epdm if the underlying substrate is soft or malleable. Hail caused punctures or tears to the roof panels or hail was large enough to cause distortion and or disengagement of the lap seams either of which allow water to immediately penetrate the roof assembly. When rust forms you ve just exponentially increased the amount of weathering that roof surface is going to experience.

As demonstrated in haag s 2010 report ice ball impact testing of roofing materials the typical threshold size for hail necessary to rupture metal panels in good to fair condition is at least 2 5 inches. Any structural engineering company will highly recommend conducting roof inspections often. New metal roof 14 500 average price. Hail will hit the shingle with force and the second layer of shingles will allow for a cushion which will cause a hail pot mark on the shingle.

Residential roofs are covered by a variety of materials including asphalt shingles metal concrete and clay tiles and fiber cement tiles. New shingle roof 7 500 average price. In a hail event a possible scenario is the metal roof gets painted and a piece of hail chips the paint. In the same manner your car operates when paint gets chipped rust begins to form.

A sound epdm roof covering can withstand impact by hailstones up to 2 inches in diameter. Hail caused dents to the roof panels i e. Multiple layers of roofing shingles can allow hail to cause damage to the shingles. The age of the roof plays a big role in how vulnerable it is to wind or hail damage.

However four out of five houses in the united states are covered with asphalt shingles. Roof cover also referred as a membrane most low pitch membranes can be classified as built up roof membranes metal panel roof systems modified bitumen sheet membranes synthetic rubber. New flat roof 8 225. When epdm roof coverings do sustain damage surface cracks can occur similar to thermoplastic membranes.