Processes are available for spraying or injecting under pressure materials such as polyurethane and isocyanu-rate in a foamed liquid state. The foam sets into a rigid mass within minutes of installation. Because this foaming operation is, in effect, the last stage of manufacturing the product, and it occurs at the building site, the installer must be highly skilled and very conscientious to provide a product of uniform quality and consistency. Ensure that the products being installed are approved for use in houses. It is recommended that a qualified contractor perform the installation.

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Boating Secrets Uncovered

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