Patent ID: 11913222
Assignee: HOLCIM TECHNOLOGY LTD
Field: Surface technology, coating (Chemistry)
Classification: CPC E  B  C | IPC B  C  E

Claim 13:
14. A roofing system comprising:
(i) a roof deck,
(ii) a construction board including:
a foam body having first and second planar surfaces, said foam body including a polyisocyanurate foam matrix defining a plurality of closed cells, said closed cells being substantially devoid of hydrocarbon blowing agents, and said foam body being characterized by a density, pursuant to ASTM C303, of at least 2.5 lb/ft3, and
a facer disposed on a planar surface of said foam body, said facer including a glass substrate having an internal planar surface proximate to said foam body and an external planar surface opposite said foam body, a first coating disposed on said external surface, and a second coating disposed on or proximate to said internal surface, where said first coating disposed on said external surface includes an inert filler, and where said second coating disposed on or proximate to said internal surface includes intumescent material,
where said first coating includes a first polymeric binder in which said inert filler is dispersed,
where said second coating includes a second polymeric binder in which said intumescent material is dispersed, and wherein said second polymeric binder is devoid of polyurethane,
said construction board being disposed on said roof deck, and
(iii) a water-protective layer disposed on top of or above said construction board.