Roof Blistering Vs Hail Damage

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.

Roof blistering vs hail damage.

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. Blisters remove asphalt down to the roof itself. How to distinguish wear types on asphalt shingle roofs.

Every year multiple hail storms cause billions of dollars of property damage. Typically asphalt shingles only blister where the exposure conditions on the roof include one or more of the following. 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. Hail storm damage vs.

The main differences between blistering and hail damage are. In 2019 the united states experienced 5 396 large hail storms as documented by the noaa severe weather database. Eventually the tops will erode away. That storm dropped a record setting 4 83 inch diameter hailstone in bethune colorado.

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. One of these storm clusters was a beast of a hail storm in colorado. Occasionally damage from hail is mistaken for damage from blisters. Blisters are caused by the expansion of volatile gasses escaping from the asphalt layer.

Hail damage is usually scattered around the entire roof instead of just one location. Gas migrates to the shingle s surface where it forms bubbles. Hail damage compared with blister rash damage on asphalt roofing shingles. 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.

How to tell the difference. Location physical appearance and debris.