New to this forum, seeking information about the manufacturers warranty regarding the use of 3 tab shingles vs. using the ridge cap singles designed for that use.
With the ridge cap being the most stressed portion of the roof, I cannot see why it's even acceptable to bend a 3 tab shingle to be utilized in a function for which it was not designed and expect the product manufacturer to stand behind it.
Also: I believe there to be an issue with replacing with like kind and quality. If they had materials designed to be a ridge cap before, why wouldn't the policy owe to put back what they had?
I'm an estimator and project manager that frequently runs into the vendor program adjuster who says "ridge cap is not permitted, use the waste from the 3 tab shingles". While I site that is not a best practice, and may be subject to voiding the warranty, I'd like to obtain some factual information source material to reference that actually backs up what I'm saying. Otherwise whenever I'm called on my statement, it becomes my opinion vs. theirs. And the insurance company's recourse at that point is, my opinion is flawed and we choose to participate on their program, etc., etc. [you know that business decision thing "you don't have to do our work, because we can always find someone else who doesn't know their cost of doing business, etc"].
I prefer not to have an us vs. them mentality, but rather put my energy into educating adjusters, and their managers as to why it's not a good idea to cut a corner. One of which is simply the insurance co. has sold the program to their policyholders which often comes with a all encompassing warranty that usually greatly exceeds what a homeowner could get using a contractor not on their program.
That's fine, however I have a big issue with an insurance company offering up a rich warranty [which the insurance co. just passes onto the contractor] while "not permitting" a best practice, or at least a standard of care.
As a general contractor who does insurance work, much of through various vendor programs, I can say that most adjusters are agreeable to whatever I propose provided I can provide supporting reasons to back up what I need. This is so they can support and back up their decisions [approvals] to their supervisors.
It takes some work on my part to do so, but I'm successful 80% of the time. In part it's helpful to provide proof that our file is well documented [often in their own system, which then becomes a permanent record], that what they are instructing me to do isn't really a good idea.