A non-compressed heat insulation barrier fabric composite comprising a layer coating of polysiloxane and silicate applied to a textured woven fabric under heat and pressure in a multi-step process to produce a decompressed composite. The fabric composite is produced by coating the woven fabric with the polysiloxane silicate coating and partially curing under heat and pressure to produce a partially cured. composite, whereupon the curing process is interrupted and the partially cured composite is decompressed to loosen the fibers, followed by complete curing of the composite under heat without significant pressure to produce a non-compressed heat insulation barrier fabric composite.