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The seamless and monolithic nature of the sprayed foam provides a full proof method of sealing cracks and rendering any surface moisture resistance and draught proof. The closed call foam has low water vapour transmission properties and also inhibits ingress of moisture.
The excellent adhesion of the sprayed material makes mechanical fastening redundant. The low density of material adds little weight to overall loading. The firm bonding to the substrate can also add significantly to reducing vibration of thin membrane roofs and structural strength of building itself.
On roof work the insulation effect of the foam reduces thermal movement of the roof deck and helps prevent failure of the roof covering. Far from being confined to flat surface, spray applied is ideal for curved corrugated, and irregular surfaces.
Besides external use, spray foam can be applied internally as long as the building is suitable, having easy, convenient access for application and good ventilation. The foam can be sprayed on to the underside of roofs or suspended floors and on to the inner surface of wall.
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