Architect: GM Design Associates
Main Contractor: Patrick Bradley Limited
The roof system used for the Limavady PFS project consisted of:-
ARKzip 65/400 in 0.9mm stucco aluminium
290mm non-combustible insulation
ARKbar spacer
Vapour control layer/ air barrier membrane
ARKdeck 158 in 0.88mm steel with a white polyester finish.
17.5m waveform shaped ARKzip standing seam sheets were smooth curved in the factory to 20m concave/ 30m convex radii and joined at the ridge on site using the ARKzip sealed-ridge lap detail.
The structural liner was ARKdeck structural deck, laid across falls with spans up to 6.2m between rafters providing a working platform and supporting the roof covering.
ARKdeck is self finished with a RAL9002 off white polyester paint system.
The class A1 non-combustible insulation was installed with a 10% compression and provides a U value of 0.15W/m2K