Page 84 - Glow Insulation Product Guide

PIR (WALLS)
Cavity Walls: Masonry - internal dry lining
with Quinn Therm QL-Kraft insulated plasterboard
Design and Installation
Cavities up to 100mm wide require ties at maximum 900mm horizontal centres and 450mm vertical centres, with additional ties around openings and at corners. Cavities wider than 100mm may require ties at reduced centres.
Cavity wall ties can have a significant impact on the overall U-value of the wall. It is therefore important to select ties which will minimise heat loss, such as stainless steel double triangle ties. Ties should comply with EN 845–1 and PD 6697.
Insulation in the wall cavity must extend 150mm below the upper edge of floor insulation to prevent thermal bridging. If the cavity includes a radon barrier the first run of boards should be supported on the cavity tray.
Quinn Therm boards should be fitted against the inner leaf of masonry and held in place by wall-tie clips or collars. Boards must be butted tightly together atcornerstogiveacontinuouslayerof insulation, and cut neatly to fit tight to the backs of frames, sills, cavity closers and lintels.
To minimise air infiltration, a continuous strip of dry-lining adhesive should be used to seal the perimeter of the Quinn Thermal QL-Kraft boards, including around window and door openings.
Benefits
• Suitable for new build projects.
• The combination of Quinn Therm QW within the masonry cavity and Quinn Therm QL-Kraft thermal laminate applied to the internal face of the wall achieves the very low U-values required by some projects.
• The low emissivity facings of Quinn Therm enhances the thermal performance of the cavity between masonry leaves.
•Quinn Therm QW has good dimensional tolerances, enabling boards to be tightly butted to form a continuous layer of insulation within the cavity. The boards are co-ordinated with standard wall tie spacings.
• Quinn Therm QL-Kraft enables thermal insulation and internal finish to be applied in one operation.
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