[[wiki-architecture]] · [[Building Materials]] · [[ARCHITECTURE]] · [[000]] # Cementitious foam insulation Cementitious foam insulation is a cement-based thermal and acoustic insulation, with an R-value similar to that of fiberglass. It is installed as a foam with a consistency like shaving cream, or as pre-cast slabs. The current cost is similar to that of polyurethane foams. Unlike many foam-in-place polyurethane foams, it is nonflammable and non-toxic. As it is water-based, it offgasses water vapour while curing, requiring ventilation and in some cases a dehumidifier. It cures more slowly than organic foams. However, it does not offgas volatile organic compounds as many organic foams do. Like cement, it is water-soluble until cured, but after curing it is water-resistant, but water-permeable. It does not expand on setting, but may shrink slightly in open cavities. Structurally, it does not resemble concrete; at the low densities that make it well-insulating, it is quite fragile. It can be crumbled away to re-expose wiring or pipes, making a pile of grey powder. Also unlike concrete, it is quite lightweight. It is not a new product, having been around for some decades, but exclusive rights to an established cementitious foam product have recently been purchased by a company that has been giving it more publicity. == References == - [[Building Construction/Construction & Materials/Building Material/Insulation Materials]] - [[Professional Practice/Construction Management]] - [[Urban and Planning/Master Planning]] - [[Digital Architecture/ePractice/Computational Design]] - [[Urban and Planning/Urban Design and Planning]] - [[Digital Architecture/ePractice/GIS and Spatial Analysis]] - [[Building Construction/Specifications and Detailing/Joint Design]] - [[Environmental Design/Passive Design Strategies]] - [[Building Construction/Construction & Materials/Building Material]] - [[Building Construction/Area Programming]]