Roof Blistering Vs Hail Damage

Every year multiple hail storms cause billions of dollars of property damage.

Roof blistering vs hail damage.

Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. 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. Hail damage is usually scattered around the entire roof instead of just one location. Hail storm damage vs.

This illustration shows the difference in profile between a. One of these storm clusters was a beast of a hail storm in colorado. Location physical appearance and debris. How to tell the difference.

That storm dropped a record setting 4 83 inch diameter hailstone in bethune colorado. Hail damage compared with blister rash damage on asphalt roofing shingles. 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. 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.

The main differences between blistering and hail damage are. Blister on the left hail damage on the right. Blisters are typically small steep sided craters measuring a quarter inch 6mm or less in diameter with no granules visible in the crater. Eventually the tops will erode away.

In 2019 the united states experienced 5 396 large hail storms as documented by the noaa severe weather database. Blisters remove asphalt down to the roof itself. From there many of the adjusters are paying for roof replacement because they too believe that what was observed on the roof is functional damage from hail strikes. Gas migrates to the shingle s surface where it forms bubbles.

How to distinguish wear types on asphalt shingle roofs. Occasionally damage from hail is mistaken for damage from blisters.