Roof Blistering Vs Hail Damage

Eventually the tops will erode away.

Roof blistering vs hail damage.

How to tell the difference. Blister on the left hail damage on the right. Hail storm damage vs. The main differences between blistering and hail damage are.

Blisters are typically small steep sided craters measuring a quarter inch 6mm or less in diameter with no granules visible in the crater. This illustration shows the difference in profile between a. 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. Hail damage compared with blister rash damage on asphalt roofing shingles.

Gas migrates to the shingle s surface where it forms bubbles. That storm dropped a record setting 4 83 inch diameter hailstone in bethune colorado. Every year multiple hail storms cause billions of dollars of property damage. Occasionally damage from hail is mistaken for damage from blisters.

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. How to distinguish wear types on asphalt shingle roofs. 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. Location physical appearance and debris.

Hail damage leaves a dent while blistering causes more debris than hail damage due to the popping. Blisters are caused by the expansion of volatile gasses escaping from the asphalt layer. Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. In 2019 the united states experienced 5 396 large hail storms as documented by the noaa severe weather database.

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. Hail damage is usually scattered around the entire roof instead of just one location.