Recent disastrous fires and changing codes suggest that rigid foam cladding is too risky, but mineral wool can fill the void.

Since the catastrophic Grenfell Tower fire in the UK in June of 2017, questions about the safety of cladding commercial structures with rigid foam continue to arise. To be clear, concerns about low-rise residential properties seem less urgent. The issue is whether structures that contain large number of people—apartment buildings, office complexes, schools and hospitals-- are put in harm’s way by continuous rigid foam-based cladding.