palmettoinspect Posted November 8, 2010 Report Share Posted November 8, 2010 The house I did today was built in 2006. The roof covering is 20 year 3 tab asphalt shingles. In the pictures you can see noticeable bumps on the shingles. After scrapping one off I could tell itââ¬â¢s actually the asphalt granules bunched together. My guess would be something was wrong at factory and caused the granules to bunch together like this. Has anyone ever seen this or have any idea what caused it? Does anyone see an issue with this? As always your thoughts and opinions are appreciated. Thanks, Kiel Click to Enlarge 158.9 KB Click to Enlarge 96.34 KB Quote Link to comment Share on other sites More sharing options...
Inspectorjoe Posted November 8, 2010 Report Share Posted November 8, 2010 Rash blisters. https://www.inspectorsjournal.com/forum ... C_ID=10643 https://www.inspectorsjournal.com/forum ... IC_ID=4308 Quote Link to comment Share on other sites More sharing options...
palmettoinspect Posted November 8, 2010 Author Report Share Posted November 8, 2010 http://www.inspectapedia.com/roof/Aspha ... isters.htm Thanks! I shouldââ¬â¢ve done a Google search first. This is the first time in 5 years I've come across this. Is it common? Quote Link to comment Share on other sites More sharing options...
Inspectorjoe Posted November 8, 2010 Report Share Posted November 8, 2010 As a very rough guesstimate, I see it in maybe 1 out of 100 asphalt shingle roofs. Quote Link to comment Share on other sites More sharing options...
palmettoinspect Posted November 8, 2010 Author Report Share Posted November 8, 2010 Thanks Joe! Quote Link to comment Share on other sites More sharing options...
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