In the item about shingle warranties with unvented roofs (Q&A, 1/10), the first sentence clearly states that GAF’s warranty is still valid when the shingles are installed over a roof deck insulated with SPF foam. But later on in the same response, the author says, “since GAF-Elk does not supply the sprayed-in-place foam insulation, any damage to our shingles — or any other roof-related problems attributable either to sprayed-in-place insulation applied to the roof deck or to a lack of ventilation — is not covered by the terms of our warranty.”

What kind of double-speak is this? I’ve read the response over and over again, and I still don’t know if the company covers the shingles or not.

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