FAQs

What about polyurethane foam and the environment?

  • Polyurethane foam systems can make an important contribution to the protection of the environment – they offer superior insulation performance and therefore achieve high energy and carbon savings.
  • For further information on PU foam and the environment click: http://www.bufca.co.uk/polyurethane-foam-benefits/

What about condensation?

  • Spray applied foam provides a satisfactory method of achieving the target insulation value of 0.16W/m2K without the need to install mineral fibre insulation above the level of the 100 mm ceiling joists.
  • A report has been carried out by the Centre for Research on Indoor Climate and Health, Glasgow Caledonian University, ‘Analysis of the risk of condensation in pitched roofs with sprayed polyurethane and mineral wool insulation’.
  • The calculations demonstrate that taking the most severe internal climate likely to be found in housing, no condensation is predicted in London or Manchester, even in a once in ten years severe winter. No condensation is predicted in an average winter in Edinburgh, however a peak of 40.8 g/m2 is predicted to occur once in ten years; this evaporates rapidly in the spring. This amount of condensate would be a fine film of drops that is unlikely to cause problems by dripping onto the ceiling and will not affect the moisture content of the roof timbers. The structure can be considered to be passing the criteria set in BS EN ISO 13788:2001 and therefore, via BS 5250:2002, to be complying with the three sets of Regulations in the UK.

Why join BUFCA?

  • Joining BUFCA should bring you credibility.
  • Members can use the BUFCA logo and the 25-year BUFCA warranty. Clients are increasingly specifying BUFCA installers for their high standards of workmanship and customer care.

Can polyurethane help reduce sound transmission?

  • Polyurethane foam systems can be used to prevent the transmission of sound due to their monolithic sealing properties.
  • Application to the building substrate can reduce airborne sound penetration.
  • It is also ideal for soundproofing interior walls and floors and around plumbing stacks to reduce the sound of water rush.

What about houses with narrow cavities?

  • These houses may be known as hard-to-treat, they may have cavities of irregular widths or be less than 50mm wide. These cavities can be treated with injected polyurethane cavity wall insulation.

What about the 5.2M homes in flood risk areas?

  • Polyurethane foam can be used in flood-plain areas to provide an additional barrier against flooding through the walls.
  • In a report published jointly by DEFRA, DCLG and the Environment Agency (“Improving the flood performance of new buildings”), rigid closed cell polyurethane foam is shown to be the best performing when installed into cavity walls. The report states “Cavity insulation should preferably incorporate rigid closed cell materials as these retain integrity and have low moisture take-up.
  • The Association of British Insurers (ABI) in 2001 stated that only closed cell insulation should be used in flood risk areas. This product will provide an opportunity to insulate properties in flood risk areas as well as acting as mitigating risk and cost to the public and private sector purse as local authorities under their carbon and environmental plans take a co-ordinated approach with partner organisations such as the Environment Agency.

Can injected polyurethane help improve hard-to-treat housing?

  • Closed cell polyurethane injected in-situ is a seamless insulation solution which can offer a much greater economical, efficient, robust solution for thermal upgrading, draught proofing, structural stabilising and flood protection of not only “hard-to-treat-homes” but all homes.
  • Polyurethane foam is often the most cost effective solution for properties with hard-to-treat cavity, or with structural or defective/corroded wall ties, or those properties unsuited to external wall insulation due to planning restrictions, or for properties where internal wall insulation would disrupt tenants, or for properties in high wind or severe wind driven rain exposure conditions, or the 5.2M properties at risk of flooding.
Closed cell polyurethane injected in-situ insulation has been proven in use to be the most economical, efficient and practical solution for many of the properties designated as being hard-to-treat including:
  • Coursed stone and Random stone properties
  • Narrow/irregular cavities
  • High rise blocks
  • Properties with structural defects, corroded or missing cavity wall ties, weak defective mortar joints, or defective damp proof courses
  • Properties unsuitable for traditional cavity insulation measures due to exposure ratings
  • Properties unsuitable for external wall insulation due to planning restrictions and structural problems
  • Properties unsuitable for internal wall insulation due to disruption to tenants and cost of relocation
  • Properties at risk of flooding
  • Properties with no damp proof course

Health & Safety information

Is there any funding for PU foam?

  • The Green Deal: This is a Government-backed scheme which provides funding upfront for the purchase of insulation measures for retrofit applications. Repayments are made from the energy savings resulting from the installation. The Green Deal loan is attached to the property and its energy bills, rather than the occupier. A Green Deal assessment is carried out to outline suitable energy efficient measures. Installations are carried out by Green Deal approved installers. The cost of the improvements are paid back through electricity bills and should be less than the savings resulting from the installation.
Eligibility: Households Non-domestic sector
  • Energy Company Obligation: ECO provides funding support from the big six energy suppliers for energy efficiency improvements for households on certain benefits or those in the poorest parts of the country.
Eligibility: Low income households and vulnerable households (ECO Affordable Warmth Obligation) Households in hard-to-treat cavity houses – not means tested (ECO Carbon Saving Obligation can be used in addition to Green Deal) Households in solid walled houses (ECO Carbon Saving Obligation can be used in addition to Green Deal) Households in the most deprived areas including social housing (ECO Carbon Saving Communities Obligation)
  • Local authority schemes: These vary depending on area and may be subject to household income criteria/benefits

Why use a BUFCA installer?

  • Choose a BUFCA installer for the highest standards of quality and service
  • Installer members can provide a 25-year BUFCA warranty for your injected polyurethane cavity wall insulation project

What is polyurethane foam?

  • Spray-applied and injected polyurethane foam is a two-component chemically modified polyurethane foam which achieves superior U-value and air-permeability results.
  • Systems can be applied to various depths and have K-values in the range of 0.025 to 0.028W/mK.