Yikes

First roof I'd seen w this ALM tiles outside of Hartford

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Comment by John A Deuth on August 12, 2014 at 4:00am

In all likelihood they are sheets of High-R polyisocyanurate with a double foil facing to retard outgassing. In this application they are installed to reflect heat back out.

Comment by Tom White on July 7, 2014 at 4:33pm

ALM = aluminum or asbestos? Why would they put tiles under the roof–as insulation?

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