It's very common for the roof not to have the
minimum amount of ventilation, voiding the warrantee

Art wrote in message
ink.net...
Shingle manufacturers often have a habbit of going out of business making
the warranty useless.... like the shingles on my house.


"Greg" wrote in message
...
Remember, the warranty from the manufacturer only covers the cost of
the materials, pro-rated for the length of service the customer
received, so the actual amount you may recover in any warranty service
will most likely be small since in asphalt composition roof shingles
manufacturing defect usually show up only in the last few years of the
warranty.

My point exactly. Say you bought a 30 year roof. 15-20% of the price was
the
wholesale cost of the shingles. It fails in 15 years. You get 7-10% of
what it
cost you 15 years ago asssuming you can prove you did nothing to shorten
the
life of the shingles.