DCT-R20-1
METAL ROOF OVER AN INSULATION BLANKET AND RIGID XPS THERMAL BREAKS (HC9 SPACER MAT)
Pitched metal cathedral roof externally insulated with a continuous vapour and air retarder faced mineral fibre insulation blanket supported by a safety mesh or strapping. The full thickness of the insulation is maintained using a rigid DCT XPS thermal break at each purlin. The ProctorGeo HC9 drainage mat installed between the roof sheet, and above the vapour permeable ProctorWrap HTS sarking, provides for drainage and acoustic attenuation of rain noise.
Section J (NCC 2019) R-Value Calculator
ProctorGeo HC9 Drainage Spacer Mat is a three dimensional shaped mesh of UV stabilized polypropylene monofilaments, tangled and fused together.
ProctorWrap High Tensile-Roof (HT-S) is a medium weight highly durable medium duty vapour permeable roof underlay for use in tiled, slate and metal roof applications. ProctorWrap HTS-IT is supplied with double integrated tape.
DCT XPS Thermal Break Strips are closed cell high compressive strength, low moisture absorption extruded polystyrene (XPS) strips to serve as thermal breaks for roofs in commercial and residential applications.
ProctorPassive SmartVap is a light duty air barrier and variable vapour diffusion vapour control membrane.
