Roof Blistering Vs Hail Damage

Blisters are caused by the expansion of volatile gasses escaping from the asphalt layer.

Roof blistering vs hail damage.

According to the national oceanic and atmospheric administration noaa there was a total of 4 611 hail storms in the united states during the year 2018 with 2019 ending on a higher number as of year end more than 5 396 hail events were recorded although most people think that property and roof damage only occur in rare instances with larger than average hailstones even the smallest. Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. This article tells readers how to identify roof shingle hail damage and how to distinguish a hail damaged roof from blister rash damage foot traffic damage wind and other conditions such as shingle rash blistering cracking and granule loss associated with normal shingle aging. The main differences between blistering and hail damage are.

Foot traffic wear on asphalt shingles click to enlarge any image the dented metal flashing shown in the roof photo just above contributed by a reader is compelling evidence that the roof has been exposed to a hail storm. This illustration shows the difference in profile between a. That storm dropped a record setting 4 83 inch diameter hailstone in bethune colorado. Of the 300 roofs i inspected 40 45 of them were suffering from blisters that occurred as a result of the manufacturing process and showed no direct physical damage from hail.

Blister on the left hail damage on the right. Gas migrates to the shingle s surface where it forms bubbles. Blisters remove asphalt down to the roof itself. Blisters are typically small steep sided craters measuring a quarter inch 6mm or less in diameter with no granules visible in the crater.

Location physical appearance and debris. One of these storm clusters was a beast of a hail storm in colorado. How to distinguish wear types on asphalt shingle roofs. Every year multiple hail storms cause billions of dollars of property damage.

Eventually the tops will erode away. How to tell the difference. In 2019 the united states experienced 5 396 large hail storms as documented by the noaa severe weather database. Hail damage leaves a dent while blistering causes more debris than hail damage due to the popping.

Hail damage compared with blister rash damage on asphalt roofing shingles. Hail storm damage vs.