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Expanding Foam Insulation Foam is a substance that is formed by trapping many gas bubbles in a liquid or solid. Some commonly know foams are polyurethane foam and Styrofoam. The low density of these foams made them excellent as insulators and flotation devices. Insulation is the practice of providing a barrier surrounding, or within a building or other object to slow the conductive flow of heat. A reflective barrier is often added to insulation to slow radiative heat flow. Commonly used types of
insulation are fiberglass, polyurethane foam and polystyrene and cellulose insulation. Expanding foam or spray foam insulation is commonly known as spray applied polyurethane foam.
Expanding Foam Insulation- features
Installation of sprayed foam insulation is less expensive and is easier to maintain. The expanding foam can be sprayed directly onto the substrate without the need to measure, cut or glue. Expanding foam insulation is a durable spray solution that is not affected by moisture, vermin or insects or temperature fluctuations. Spray foam is two-component polyurethane foam that forms a closed cell structure that makes it impervious to water. Expanding foam spray blocks out drafts, dirt and water. Thus making the expanding foam weather proof, Spray foam insulation greatly reduces heat loss from buildings and reduces heating requirements, thereby making it environment friendly and energy efficient.
How does expanding foam insulation work?
In every vertical column of blocks hole is drilled through the mortar joint with a gap of eight inches. The expanding spray foam that resembles shaving cream in texture is pressure injected directly into each vertical column. The foam travel travels in all direction- top, bottom and sides of column, till it is filled completely. The pressure forces the foam horizontally through the joints into the adjacent cells. This procedure is repeated in every column and produces a wall that is filled and sealed completely. The high pressure forces the foam even through the tiniest void in the masonry. Once the voids are filled the foam comes out of the hole in form of little noodles showing clearly that the wall is thoroughly sealed. The excess foam is broom-cleaned and the holes are patched with mortar. While using the expanding foam spray wear protective gloves and protective eye wear. Avoid contact with skin, eyes and clothing.
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