AshZip U-Values

Single-Height Halter Construction

As an alternative to using the Ashgrid spacer support system within the roof buildup, Ash & Lacy also offer a single height halter option. Developed exclusively for use with the AshZip standing seam roofing system the use of this thermally efficient halter bracket is designed to offer an easy to install solution where low U-values are required.

The halter bracket is manufactured in heights of 245mm, 295mm and 345mm to offer U-values of 0.25, 0.20 and 0.16 W/m2K respectively. This method of construction significantly reduces installation time as a single component is fixed straight through to the purlin when used in conjunction with a standard liner profile.

U-Value Calculations and System Thickness

The thermal performance of the AshZip standing seam roofing system has been calculated by taking into account the effects of two and three dimensional heat flow by using computer software to model the building structure. The following tables detail the heights/thickness of the various components required to achieve the desired U-value.

Note: The above are calculated with LAMBDA 90/90 values and AshZip 400 at 1500 purlin centres. Wider purlin spacings will reduce the insulation thickness and overall system height, as may further improved ‘K’ values. Please consult our technical department for the most up to date information.

CLICK HERE to access the Ash & Lacy U-value calculators.