A home inspector was suspicious of the way the roof had been installed on a house I am considering buying. The roofer submitted a letter attesting to the better performance of the whole/half pattern he used. He states that it is actually preferred over the standard step pattern. I don't know what any of this means. Should I be concerned?
Some roofers use different techniques for positioning each row of shingles so the seams don't line up. If I understand his method the seams will line up on every other row. I'd probably ask the roofer for documentation from the shingle manufacturer that shows it is an acceptable method and will still be covered under warranty.