Eventually, if the wind force is strong enough, the tabs or shingle sections break off and are carried downwind ( Figure 3). The wind forces cause the shingle to flutter and bend such that further creases may develop ( Figure 2). This progression will tend to flip and crease or tear the shingle. As a shingle tab rises in the wind, more surface area is exposed and, thus, a stronger force occurs. Figure 1 – Relative increase in projected area (hatched box) as shingle is lifted by the wind. As the shingle rises in the wind, more surface area is exposed to the wind and, thus, a greater uplift force occurs. First, a wind-induced pressure differential between the front and back of a shingle (i.e., uplift force) has to occur, such that the factory-applied adhesive fails. When considering if wind-related damage to asphalt composition shingles can be hidden or not visually apparent, one must consider how damage to a shingle occurs.

“WIND-LIFTED” OR “WIND-DAMAGED” SHINGLES ARE NOT ALWAYS VISUALLY APPARENT This article discusses these positions and the misconceptions associated with these positions. Empirical tests can easily demonstrate the strength reduction of a shingle after a storm event.Any shingle with inadequate adhesion is a “wind-lifted” or “wind-damaged” shingle.“Wind-lifted” or “wind-damaged” shingles are not always visually apparent, but are damaging to the roof.Some of the current and most hotly debated issues relate to the assertions by some that: There are many misconceptions and a number of issues with asphalt shingles that are commonly incorrectly attributed to wind effects. The topic of wind-lifted shingles remains a controversial subject in the roofing industry. RCI-IIBEC Foundation and RCI Foundation CanadaĭecemBy Carlos R.The Guide An Overview of IIBEC Services.The Hub: Member Resources, Publications, Technical Articles.2022 IIBEC/AEI Building Enclosure Symposium.Certified Building Enclosure Commissioning Provider – CBECxP®.Registered Building Enclosure Consultant – RBEC®.Registered Exterior Wall Observer – REWO®.Registered Exterior Wall Consultant – REWC®.Registered Waterproofing Consultant – RWC®.Member Benefits, Programs, and Services.

Storm it themselves