Construction boards with coated inorganic facer

1. A construction board comprising:

(a) a foam core including a first planar surface and a second planar surface, where the foam core includes a polyurethane or polyisocyanurate cellular structure having a density that is less than 2.5 lbs/ft 2 ;

(b) a first interfacial region including a particulate filler and a polymeric binder, said first interfacial region being disposed on said first planar surface of said foam core;

(c) a first non-woven inorganic mat disposed on said first interfacial region opposite said foam core;

(d) a second interfacial region including a particulate filler and a polymeric binder, said second interfacial region being disposed on said second planar surface of said foam core;

(e) a second non-woven inorganic mat disposed on said second interfacial region opposite said foam core;

(f) a first coating layer, including a particulate filler and a polymeric binder, disposed on said first non-woven inorganic mat on a planar surface opposite said first interfacial region; and

(g) a second coating layer, including a particulate filler and a polymeric binder layer, disposed on said second non-woven inorganic mat on a planar surface thereof opposite said second interfacial region.

2. The foam laminate of claim 1 , where the non-woven inorganic mat is a non-woven fiberglass mat.

3. The foam laminate of claim 2 , where the non-woven fiberglass mat includes a binder that binds the glass fibers together.

4. The foam laminate of claim 3 , where the binder that binds the glass fibers together is a thermosetting resin.

5. The foam laminate of claim 4 , where said non-woven fiberglass mat has a basis weight of from 50 to 150 g/m 2 .

6. The foam laminate of claim 5 , where the non-woven fiberglass mat has a thickness of 0.015 to 0.05 in.

7. The foam laminate of claim 1 , where the polymeric binder binds the particulate filler together and binds the particulate filler to the non-woven inorganic mat.

8. The foam laminate of claim 7 , where the polymeric binder is a latex or a starch.

9. The foam laminate of claim 1 , where the particulate filler is selected from the group consisting of limestone, calcium carbonate, clay, talc, mica, perlite, hollow ceramic spheres, and combinations thereof.

10. The foam laminate of claim 1 , where the polymeric binder at least partially penetrates the non-woven inorganic mat.

11. The foam laminate of claim 1 , where said non-woven mat, together with the first interfacial region and the coating layer disposed thereon, is characterized by a porosity, as determined by ARC-WT-006, of less than 300 Gurley seconds/300 cm 3 .

12. The foam laminate of claim 1 , where said non-woven mat, together with the second interfacial region and the coating layer disposed thereon, is characterized by a porosity, as determined by ARC-WT-006, of less than 100 Gurley seconds/300 cm 3 .

13. The foam laminate of claim 1 , wherein said first interfacial region and said coating layer disposed on said first organic facer at least partially penetrate the first fabric substrate.

14. The foam laminate of claim 13 , wherein the first interfacial region and said coating layer disposed on said first fabric substrate are characterized by a coating weight of greater than 500 g/m 2 .

15. The foam laminate of claim 14 , wherein the first interfacial region and said coating layer disposed on said first fabric substrate are characterized by a coating weight of greater than 850 g/m 2 .

16. A construction board comprising

(a) a first facer having a first planar surface and a second planar surface, wherein the first facer includes a first fabric substrate having first and second planar surfaces, and where the first fabric is coated on both said first and second planar surfaces to provide coating layers disposed on said first and second planar surfaces of said first facer;

(b) a foam core having a first planar surface and a second planar surface, where the foam core includes a closed cell polyurethane or polyisocyanurate cellular structure having a density that is less than 2.5 pounds per cubic foot; and

(c) a second facer having a first planar surface, wherein the second facer includes a second facer substrate having first and second planar surfaces, and where the second fabric is coated on both said first and second planar surfaces to provide coating layers disposed on said first and second planar surfaces of said second facer, where said foam core is attached to the coating layer disposed on said second planar surface of said first facer and where said foam core is attached to the coating layer disposed on said first planar surface of said second facer.

17. A construction board comprising

(a) a foam core including a first planar surface and a second planar surface, where the foam core includes a polyurethane or polyisocyanurate cellular structure having a density that is less than 2.5 pounds per cubic foot;

(b) a first non-woven inorganic mat disposed adjacent to said first planar surface of said foam core;

(c) a first coating including a particulate filler and a polymeric binder, said first coating positioned between said foam core and said first non-woven inorganic mat;

(d) a second non-woven inorganic mat disposed adjacent to said second planar surface of said foam core;

(e) a second coating including a particulate filler and a polymeric binder, said second coating positioned between said foam core and said second non-woven inorganic mat;

(f) a third coating layer, including a particulate filler and a polymeric binder, disposed on said first non-woven inorganic mat on a planar surface opposite said first coating; and

(g) a fourth coating layer, including a particulate filler and a polymeric binder layer, disposed on said second non-woven inorganic mat on a planar surface thereof opposite said second coating.