polyurethane spray foam insulation provides more thermal resistance with less material used, with its insulation value almost two to three times that of other insulating materials.
polyurethane spray foam insulation lasts indefinitely given proper protection.
polyurethane spray foam insulation foam is an efficient insulating material with the lowest "K" factor and highest "R" value, resulting in significant energy savings.
These two chemicals are mixed together with catalysts and activators in a small mixing chamber of a hand-held spray gun. Hoses from metering pumps in the two drums containing the chemicals feed the gun.
Heat produced from the reaction vaporizes a "refrigerant blowing object", causing the mixture to expand to a foam about 30 times the initial volume of the liquid chemicals.
The normal density of the foam ranges from 30 to 40 kg/m3 and there is low thermal conductivity of the gas entrapped within the foam cells. Thus, providing excellent insulation value.
Rigid polyurethane foam demonstrates versatility both through its physical strengths and mechanical properties. These qualities enable it to be used in a wide variety of multi-functional building products which combine insulation with load-bearing, sealing, impact resistance, weight and space-saving, together with ease of maintenance.
Rigid polyurethane foam has one of the lowest thermal conductivity ratings of any insulant, which allows efficient retention of heat or, alternatively, maintenance of a refrigerated or frozen environment.
Effective insulation in all types of buildings plays a vital role in the conservation of non-renewable fossil fuels, which reduces emissions of carbon dioxide gas released by the burning of fuels for energy and therefore reduces global warming.
Rigid polyurethane foam provides a high level of compression and shear strength, which is further enhanced by bonding with facing materials such as metal or plasterboard.
Rigid polyurethane foam can be made either under continuous block or batch factory production, or by on-site mixing for spray and injection purposes.
During the short period between mixing and final curing, rigid polyurethane foam is extremely adhesive, which allows it to bond effectively with a wide range of building facings. The adhesion is so strong that the bond strength is usually higher than the tensile or shear strength of the foam.
Rigid polyurethane foam is compatible with a large number of building facings, including paper, foil, glass fibre, aluminium, plasterboard, plywood and bitumen. These can complement the inherent strengths of the foam, enabling use as semi-structural panels and cladding and allowing foam to accept cosmetic finishes such as plaster to operate effectively as moisture barriers in conditions of high humidity.
Rigid polyurethane foam can be used in applications which experience exceptional extremes of temperature, from -200°C to +100°C.
The water vapor permeability of rigid polyurethane foam is low and is enhanced in most building applications by the incorporation of a moisture barrier of polyethylene film or aluminum foil.
Like all organic building materials - wood, paper, plastics, paints - rigid polyurethane foam is combustible, although its ignitability and rate of burning can be modified to suit a variety of building applications and it can be formulated to meet the relevant national regulations.
Rigid polyurethane foams are usually used at lower thicknesses than other insulants, which means that their heat or fuel contribution to a fire is low compared to other, thicker insulating materials. The overall fire performance of an insulation panel can be significantly enhanced by the material that is used to face the panel - for example, steel.
Independently monitored, large-scale tests of buildings incorporating rigid polyurethane and polyisocyanurate (PIR) foam insulation carried out in the USA and Europe have concluded that, properly used, these materials do not add to the severity or serious hazard of fires.
At low densities (e.g. 30kg/m3), the volume of polyurethane polymer in rigid polyurethane foam is around 3 per cent. The remaining 97 per cent of the foam is gas trapped within the cells, which provides the low thermal conductivity properties.
The lightness of the foam is an important aspect in terms of transportation, handling and ease of installation.
Rigid polyurethane foam provides excellent resistance to a wide range of chemicals, solvents and oils.
polyurethane spray foam insulation is resistant to temperature extremes (180°F-70°F), wind driven rains, and salt spray
Requires less load bearing materials which reduces other construction costs
Joints and seams do not weaken
Moves with structure in normal expansion and contraction conditions
Effectively withstands foot traffic
Has long term insulation retention
To most substrate
Rapidly pays for itself in energy savings
Takes relatively less amount of time to apply compared to conventional, less efficient systems
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