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Natural Slate vs. Synthetic Slate: Looking Beyond Appearance
Natural and synthetic slate may share a similar look, but how do they compare over the life of a roof? At the 2026 National Slate Association Conference in Annapolis, Dr. Víctor Cárdenes of the University of Oviedo presented a comparison of these materials, examining... read more
NSA Conference ’26 – Annapolis
There is something special about putting slate contractors, quarriers, suppliers, preservation advocates, and friends of the industry in the same room. The discussions that begin during a presentation tend to continue over dinner, on a walking tour, or aboard a boat... read more
What I Learned in the Slate Valley
What I Learned in the Slate Valley With the National Slate Association Conference coming up this September, I wanted to spend some time in the Slate Valley visiting the producers who keep the industry running. It’s one thing to talk about the state of the slate... read more
Is Spray Foam Under a Slate Roof a Good Idea?
Is Spray Foam Under a Slate Roof a Good Idea? Overview The application of closed-cell spray foam insulation directly to the underside of roof decking beneath slate roofing systems has become increasingly common in efforts to improve thermal performance and energy... read more
The National Slate Federation Warns of the Severe Impact of the Energy Crisis
The National Slate Federation Warns of the Severe Impact of the Energy Crisis Be Natural Source Article – Photo Credit Cupa Pizarras The National Slate Federation (FNP) is the principal body representing, defending, and coordinating the interests of the Spanish... read more
