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
| Required thicknesses of QUINN-therm QL for different wall constructions | ||||||
|---|---|---|---|---|---|---|
| U-value (W/m2K) | Thickness of QUINN-therm QL* (mm) | |||||
| 0.37 | 35 | 40 | 40 | 25 | ||
| 0.35 | 40 | 40 | 45 | 25 | ||
| 0.30 | 50 | 50 | 55 | 35 | ||
| 0.27 | 60 | 60 | 60 | 40 | ||
| 0.25 | 65 | 65 | 70 | 50 | ||
| Masonry | 215mm | 500mm | 215mm | 215mm | ||
| Brick | Natural stone | Dense block | Quinn Lite (B5) | |||
* Thickness of insulation only: allow 12.5mm for thickness of plasterboard.
Results based upon wall construction of:
masonry (see table), 15mm plaster, QUINN-therm QL, 25mm cavity, 12.5mm plasterboard.
Calculations performed to BS EN ISO 6946:1997, taking account of repeating thermal bridges.
Design Notes
- QUINN-therm QL shown fixed to battens using specified plasterboard fixings. On uneven walls battens may have to be packed out.
- QUINN-therm QL can also be installed on dabs of drywall adhesive with secondary mechanical fixings.
- QUINN-therm QL boards supplied in 2.4m lengths to match storey height and minimise cutting.
- a VCL may be required in some constructions: contact Quinn Technical Services for advice.
Introduction
QUINN-therm QL (Quinn Laminate) is a PIR (polyisocyanurate) insulation and plasterboard laminate for improving the thermal performance of walls in new build and refurbishment projects by internal lining.
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.
Adding an insulation to the inner face of a masonry wall is a straightforward and cost-effective way of improving the thermal performance. Using an insulation/plasterboard laminate makes the process more efficient by allowing the insulation and surface finish to be installed in one operation.
Because the addition of insulation and new surface finish will affect the usable space in the room it is vital to specify high performance insulation. QUINN-therm, which is incorporated in QUINN-therm QL boards offers a high thermal resistance, minimising the volume lost in the upgrade.
Installation Guidance
- Prepare the wall surface: ensure it is true; remove existing skirting, picture rails and projecting window boards; remove any wall coverings with a high vapour resistance (e.g. vinyl wallpaper or gloss paint).
- Cut QUINN-therm QL boards to size - ideally to floor-ceiling height.
- Fix QUINN-therm QL boards in place with suitable mechanical fixings. Seal junctions.
- Apply plasterers scrim to all joints and apply a skim coat of plaster.
Notes
- Line window reveals with QUINN-therm QL to avoid thermal bridging. Trim insulation from the board at junctions to give a continuous finish of plasterboard.
- Fix heavy items such as cupboards and sanitary units back to the wall.
- Chase services into the wall, not the insulation board.
Handling & Storage
QUINN-therm QL boards are supplied in shrink-wrapped packs. Store boards under cover and out of direct sunlight, keeping boards flat.
When handling QUINN-therm QL do not knock corners and edges. Cut QUINN-therm QL with a fine tooth saw or trimming knife.
| Product Data | ||
|---|---|---|
| Properties | Value | QUINN-therm QL |
| Board width x length | mm | 1200 x 2400** |
| Board thickness | mm | 20 - 200 |
| Board density | kg/m3 | 26 - 32 |
| Area per board | m2 | 2.88 |
| Edge profiles available | Butt edged | |
| Performance Data | ||
| Properties | Value | QUINN-therm QL |
| Thermal conductivity* | W/mK | 0.022 - 0.023 |
| Water vapour resistivity | MNs/gm | ~ 400 |
| Compressive strength | kPa | >120 |
* insulation thickness - add 12.5mm for plasterboard
** quoted in accordance with BS EN 13165:2001 ‘Thermal insulation for Buildings - factory made polyurethane foam products’.
*** other sizes may be available upon request.
Installation Guidance
When fixing QUINN-therm QL boards with drywall adhesive apply a continuous strip of adhesive to seal the perimeter then use mechanical fixings for secondary restraint. Alternatively, use treated timber battens to form the perimeter seal: trim the QUINN-therm QL board to achieve a tight fit. Use plasterboard nails at 300mm centres to fix the boards to the perimeter battens.
Typical detail for plasterboard incorporating insulationAfter boards have been positioned on dabs and left to set,fit two secondary fixings per board along horizontal centreline 15mm in from vertical edges |
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Alternative detail for plasterboard incorporating insulationAs an alternative to continuous drywall adhesive at perimeters,treated battens mechanically fixed to the masonry can be used. The plasterboard is fixed to the battens at 300mm centres. Insulation can be notched around the battens to ensure a neat fixing. |
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