SRAY-APPLIED POLYURETHANE foam is a unique roofing material. It is sprayed as a liquid directly onto the roofing substrate; within seconds it foams, expanding 20 to 30 times its original volume.
Their properties are categorized based on the foam structure. The foam has two types of structure:(1) Open-cell structure (2) Closed-cell structure.
The knowledge that the use of blowing agents such as CFCs or HCFCs contributes to the destruction of the ozone layer and global warming, triggered changes in environ- mental legislation.
The knowledge that the use of blowing agents such as CFCs or HCFCs contributes to the destruction of the ozone layer and global warming, triggered changes in environ- mental legislation.
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