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Missile damage refers to cuts, gouges, dents, and abrasions to the coating and SPF caused by materials such as tree branches, signs, parts of other buildings (e.g. shingles, metal panels, flashings, doors, and windows), and many other non-secured items hitting the roof during a windstorm. Consequently, damage from wind-driven missiles is likely to be quite varied, depending on the items that strike the roof.

Small cuts or gouges (less than 76 mm [3 in.] in diameter) in the SPF can be repaired by caulking the holes after the damaged material is removed. Larger damaged areas should be repaired by removing the impacted sprayfoam, applying new material and coating to the void.

coating film thicknesses
Wind damage may be isolated to small areas of the roof or cover large areas. Thomas whatsapp number database Smith, AIA, noted in his observations of SPF roofs struck by Hurricane Andrew, “It appears a thickness of 50 mm (2 in.) [of foam] is sufficient to prevent penetration of most missiles.”

Damage most likely to occur to SPF roofing systems during a hail event include cracks, punctures, and dents to the roof surface. Both the protective covering/coating and the SPF can be damaged. When hail strikes an SPF roof, cracks shaped like crow’s feet or semi-circles may appear on the coating surface.