Key Properties
QUINN-therm
- does not readily absorb water, making it suitable for use in damp environments;
- is light, robust and easy to handle; it may be worked using a saw or sharp knife;
- is durable and will perform for the service life of the building.
Meeting Regulations
| Thickness of QUINN-therm QRFR to meet rquired U-value (W/m2K) | |||||
|---|---|---|---|---|---|
| Required U-value (W/m2K) | 0.25 | 0.22 | 0.20 | 0.18 | 0.16 |
| Thickness of QUINN-therm (mm) | 90 | 100 | 110 | 125 | 140 |
Results based on roof construction of:
Lightweight metal deck, QUINN-therm QRFR, waterproofing membrane. 5 fixings/m2.
Calculations performed to BS EN ISO 9646:1997, taking account of repeating thermal bridges.
Design Notes
- Detail perimeters to minimise thermal bridging and air infiltration at wall/roof junctions.
- The fixing pattern should be determined from the predicted uplift forces, and the type of fixing selected. Consult Quinn Technical Services for advice.
- Whilst QUINN-therm QRFR boards are compatible with a wide range of membranes the membrane manufacturer should always be consulted to confirm compatibility.
Introduction
QUINN-therm QRFR (Quinn Flat Roof) is a PIR (polyisocyanurate) insulation board intended for use in lightweight metal roof decks covered with single ply roofing membranes. QUINN-therm consists of a core of PIR foam bonded on both faces to composite aluminium facings; the gas filled cells give QUINN-therm its high thermal performance and strength.
Lightweight metal deck construction enables rapid weatherproofing of large roof spans. In a typical system the metal deck is covered with a VCL then rigid insulation boards are mechanically fixed to the deck.
The waterproofing layer - usually a single-ply polymeric membrane is then laid and fixed through to the deck. QUINN-therm QRFR is an ideal solution for such roofs: its low thermal conductivity minimises the insulation thickness, while the boards provide a stable substrate for installing the waterproofing.
Installation Guidance
- Lay the vapour control layer over the metal deck with laps sealed and edges bonded to the roof perimeter.
- Lay QUINN-therm boards in brick bond, with long edges at right angles to the troughs of the deck. Ensure board ends are supported on the crowns of the deck.
- Fix QUINN-therm boards to the deck with mechanical fixings, which should be at least 50 mm from board edges.
- Lay and fix the waterproofing membrane.
Notes
- Butt boards tightly together to form a continuous layer of insulation.
- Cut boards neatly around penetrations. Seal gaps with expanding foam.
- Avoid high point loads on boards during installation.
Handling & Storage
QUINN-therm QRFR boards are supplied in shrink-wrapped packs. Store boards under cover and out of direct sunlight, keeping boards flat.
When handling QUINN-therm QRFR do not knock corners and edges. Cut QUINN-therm QRFR with a fine tooth saw or trimming knife.
| Product Data | ||
|---|---|---|
| Properties | Value | QUINN-therm QRFR |
| Board width x length | mm | 2400 x 1200** |
| Board thickness | mm | 60 - 200 |
| Board density | kg/m3 | 30 - 34 |
| Area per board | m2 | 2.88 |
| Edge profiles available | Butt edged | |
| Performance Data | ||
| Properties | Value | QUINN-therm QRFR |
| Thermal conductivity* | W/mK | 0.022 - 0.023 |
| Water vapour resistivity | MNs/gm | ~ 400 |
| Compressive strength at 10% deformation | kPa | >150 |
* quoted in accordance with BS EN 13165:2001 ‘Thermal insulation for Buildings - factory made polyurethane foam products’.
** other sizes may be available upon request.
