Merseyside-based housing association Helena Homes, has modernised and updated 107 BISF properties with cutting edge technology, helping to keep homes warmer for longer while reducing the cost of fuel bills.
The homes were constructed in the 1940s and 1950s and traditionally had poor thermal insulation and environmental performance. Helena Homes commissioned the project with the aim of extending the life-span of the properties by a minimum of 30 years, whilst also giving the overall look of the estate a fantastic boost, benefiting local residents and the local community.
Initial tests on the homes confirmed their poor thermal performance, achieving a U-value of only 2.09 W/m2.K. An external wall insulation (EWI) solution, installed by partner contractors Forrest, was specified by the project design team to help tackle this. The solution uses 100mm of Kingspan premium performance Kooltherm K5 External Wall Board with Alumasc’s Swisspan EWI system, allowing the houses to be simultaneously thermally and aesthetically upgraded, without the need for residents to leave their homes.
The ability of the Kooltherm insulation to achieve thermal conductivities as low as 0.020 W/m.K, with minimal thicknesses made it ideal for the project, helping to reduce the structural loading and ensuring that window reveals and sill depths were kept to a minimum.
The refurbishment provided large improvements in the overall thermal efficiency of the properties, achieving a U-value of 0.26 W/m2.K. This improvement is expected to bring savings of around £100 in annual heating bills for each household, and with energy prices rising fast this will only become more significant over time.
Helena’s Sustainability & Innovation Manager, Martin Roughley said: "We chose to insulate these properties with Kingspan Kooltherm K5 insulation, helping to improve their thermal performance by over 50%."
"Kingspan were involved with the specification from an early stage in our retrofit scheme, to ensure we met our intended design criteria. The specialist advice they gave us enabled us to meet the requirements of both the scheme and our residents."
As the original render system on the properties was non-structural, Alumasc’s Swisspan system was mechanically fixed directly to the structural stanchions of the properties, providing the necessary support for both the Kingspan Kooltherm insulation and the render facade. In addition a range of other features were installed on the properties including new roofs, windows, doors and PV panels.
Kingspan Kooltherm K5 External Wall Board is suitable for use behind traditional and lightweight polymer modified renders and dry cladding systems. All products in the Kooltherm range contain a Class 0 rated insulated core and are manufactured with a blowing agent with zero ODP and low GWP.
As part of the refurbishment, improvements were also made to the local environment including hard and soft landscaping and the local street scene. The reduction in household carbon emissions as a result of the refurbishment also led to the Moss Bank project being awarded a Green Apple Award for sustainability from The Green Organisation.