Page 73 - Glow Insulation Product Guide

PIR (FLAT ROOF)
1 - Roof joists
2 - Timber deck
3 - AVCL
4 - QRFR boards
5 - Waterproofing layer 6 - QRFR boards
6
5
4
3
2
1
U-value results below based
upon flat roof construction shown:
12.5mm plasterboard; roof joists; timber deck; AVCL; Quinn Therm QRFR insulation (QRFR-FFR shown for illustration); waterproofing layer (single ply membrane with 5 fixings per m2 shown). Calculations performed to BS EN ISO 6946, taking account of repeating thermal bridges.
Required thickness of Quinn Therm on a flat roof with a timber deck
Built-up roofing: Built-up roofing: Built-up roofing:
Quinn Therm QRFR-FFR Quinn Therm QRFR-GFR Quinn Therm QRFR-BFR
Quinn Therm U-value thickness (mm) (W/m 2K)
75 80 90
100 110 120 125 130 140 150
80 + 80 80 + 90*
0.25 0.24 0.22 0.20 0.18 0.17 0.16 0.15 0.14 0.14 0.13 0.12
Quinn Therm U-value thickness (mm) (W/m 2K)
90 100 110 120 125 130 140 150
80 + 80 90 + 90
0.24 0.22 0.20 0.18 0.17 0.17 0.16 0.15 0.14 0.13
Quinn Therm U-value thickness (mm) (W/m 2K)
90 100 110 120 125 130 140 150
80 + 80 90 + 90
0.24 0.22 0.20 0.18 0.17 0.17 0.16 0.15 0.14 0.13
Compatability
• Quinn Therm QRFR-FFR: suitable for mechanically fixed single ply membranes.
• Quinn Therm QRFR-GFR: suitable for fully adhered and mechanically fixed single ply membranes, partially bonded built up felt, mastic asphalt and cold liquid applied waterproofing systems.
• Quinn Therm QRFR-BFR: suitable for hot or cold bonded built-up bituminous waterproofing systems.
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