Kalzip low U-value roof system

The Kalzip low U-value roof system is a dual insulation system capable of achieving U-values as low as 0.10 W/m2/K. It has been developed in anticipation of changes to Part L of the Building Regulations in 2010 and beyond – changes that will lead to ever-tightening design limits on thermal performance.

The Code for Sustainable Homes represents current best practice for the construction of residential dwellings and is closely linked to the Building Regulations. It is generally accepted that a similar code will be extended to non-dwellings, driving the way forward to achieving zero carbon buildings by 2019.

The symbiosis of rigid insulation boards with glass mineral fibre layers allows the system to achieve such low U-values giving significantly greater overall thermal resistance compared to that of one single layer of insulation of the same total thickness.

The low U-value system is primarily based on a standard Kalzip standing seam roof build and as such is subject to the same basic set of criteria and properties for materials, finishes, geometries, accessories and components. It is available with four types of roof lining; standard liner; liner-deck; structural metal deck; timber deck.

Sustainable options
The low U-value system can be combined with renewable (Kalzip AluPlusSolar) and green roof (Kalzip Nature Roof) technologies.

Curving parameters
Where Kalzip Insulation 23 board is fixed to a curved liner, there are a number of possibilities to accommodate solutions for flat roofs and curved roofs down to a 1.5° radius.

NBS specifications are available on request along with further details on acoustics, fire and thermal efficiency.

For further information please download or request the Kalzip systems brochure or contact us.