- High performance insulation
- Structural stabilisation
- Air tightness
- Condensation control
- Building regulations
- Fire ratings
- Reduction of sound transmission
- Energy saving
The insulation value is amongst the best available as the foam seals all gaps and moulds itself to all contours. It has the ability to provide significant structural strength and it creates its own vapour control layer – essential in today’s highly insulated buildings.
Environmental impact improvement
An independent review on the impact of thermal insulation on global warming and the potential for further savings in carbon dioxide emissions has been carried out. The results were published in ‘Thermal Insulation and its Role in Carbon Dioxide Reduction’, written by Caleb Management Services.
The research highlighted:
- Thermal insulation can play a key role in the cost effective reduction of carbon dioxide emissions in Europe and save up to 350 million tonnes per annum.
- Retrofitting of uninsulated or poorly insulated installations provides by far the biggest contribution to carbon dioxide savings and suggests that the targeting of retrofit programmes to those member states with average carbon dioxide emission rates above 0.5Kg/kWh for power generation should be prioritised.
- Insulation materials that can be most easily and efficiently retrofitted need to be prioritised.
Insulation materials that can be most easily and efficiently retrofitted need to be prioritised.
The report also pointed out that insulation materials should be highly efficient in terms of performance at low thickness levels, should have a high strength to weight ratio, should be easy to apply, fibre-free and resistant to moisture.
The key requirements listed above admirably describe the properties of spray-applied polyurethane (PU) foam. The two component liquid system produces a highly efficient blanket of insulation with a thermal conductivity of 0.02W/mK. It is particularly easy and cost-effective to apply to a wide variety of substrates and is fibre-free. Its closed-cell nature renders it very resistant to moisture ingress and grades are available which achieve both Class ‘1’ and Class ‘0’ fire ratings when tested to BS476 Part 7 and Part 6 respectively. Furthermore it has a very good track record in retrofit applications, both domestic and industrial.
One of the most important aspects of spray applied polyurethane foam is the fact that it produces a seamless blanket of insulation giving rise to a product without joints. Any jointed system, including insulation boards, gives rise to a potentially weak point leading to a significant loss of insulation value.
Sprayed or injected foam can make an important contribution to the protection of the environment, especially through retrofitting of existing buildings.