Insulation specialist Actis has been working with Hertfordshire Building Control to create a home extension insulation specification guide
The U-value of Elements New Gold Guide has been produced with help from a number of insulation and concrete block manufacturers and is aimed at helping specifiers comply with Part L of the building regulations.
All Actis products – its long-standing and popular Hybrid range and its new two-in-one reflective insulation with integrated vapour barrier, Eolis HC – are referenced in the guide, with precise details on how they can be used to achieve compliant U-values.
The guide shows in detail different solutions in a range of scenarios
Actis UK and Ireland technical director Thomas Wiedmer said: “We were delighted to work with Hertfordshire Building Control, who wanted to create a comprehensive booklet offering the best possible advice to architects and specifiers working throughout the county.”
Charts show that one way which to achieve the required U-value of 0.18 in a timber frame wall is to use 50mm Actis Hybris along with insulating vapour control layer H Control Hybrid and insulating breather member Boost R Hybrid.
One solution for a vented pitched roof with a required U-value of 0.15 would be to use a new Eolis HC and insulated plasterboard.
An alternative would be to use a combination of Hybris and H Control Hybrid, with each solution suiting both 400mm and 600mm centres.
Building control organisations across the UK regularly request Actis’ expertise on how to achieve the best U-values
Among the options suggested to achieve a U-value of 0.15 in a warm-pitched roof is the use of Boost R Hybrid Roof, which contains a lap and built-in adhesive tape for ease of installation, 90mm Hybris and H Control Hybrid.
While this is the solution for 600mm centres, the Hybris thickness would need to increase to 105 mm when working with 400mm centres.
Building control organisations across the UK regularly request Actis’ expertise on how to achieve the best U-values, by booking its RIBA-approved CPDs Tomorrow’s Insulation Solutions for Future Homes Standards and Addressing the Performance Gap using Reflective Insulation.
You can receive a copy of the guide here.
