Originally Posted by BrianKiernan
Along with the other 101 reasons you should not do a job like this, I don't believe and shingle company would back up their warranty on the product.
In other words there would be no warranty on the shingles from the moment you put them down.
Shingle MFGs will and do warranty their product when applied as a nail over. They have instructions on how to do it.
Is this a good method of installation...NO
Will I have a warranty...YES
Will I compromise the life expectancy of my roof...YES, diminished by at least a third.
Will I get a good value...NO, when you look at the cost of shingles in the future, increased labor, you will pay significantly more in the long run.