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Knauf Drywall’s range of Thermal Laminate Plaster-boards provide ideal, cost effective dry lining and insulation solutions for solid and cavity-walled buildings, dramatically cutting energy needs of a typical home and reducing CO2 output by approximately 0.5 - 3.0 tonnes per year
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Knauf Thermal Laminates prevent wastage of heat through the walls, which helps to reduce energy required for heating. The saving in energy costs results in an attractively short payback time where a house has been upgraded to Knauf Thermal Laminates. In the longer term, it becomes a real saving for the homeowner.
Thermal Laminates can also be used to accelerate building schedules in new constructions by combining the functions of insulating and lining.
Knauf Drywall Insulating Laminates combine the qualities of Knauf Wallboard or Knauf Vapourshield with additional insulating materials to provide thermal and acoustic performance, plus condensation control where required.
They are perfect for internal applications in both new or refurbishment constructions to meet specified levels of thermal insulation and to satisfy Building Regulation requirements.
The use of highly efficient insulating materials enables Knauf Insulating Laminates to offer excellent thermal resistance whilst the thinnest appropriate section can be selected. This keeps costs down and minimises the loss of valuable room space.
The laminates have a layer of expanded polystyrene, CFC-free extruded polystyrene, or CFC and HCFC-free phenolic foam bonded to 9.5mm Knauf Wallboard.
Knauf Thermal Laminates range from 22mm to 65mm in thickness, with the thickest – 65mm Knauf Phenolic Laminate – providing thermal resistance of 2.58m2 K/W.
Knauf Thermal Laminates are fixed on adhesive dabs or mechanical fixings and are used to line brick or block walls in new, refurbished or extended residential and commercial buildings. Because they incorporate highly efficient insulation materials, relatively thin sections can be selected to deliver the required performance – keeping down costs and minimising the loss of valuable room space. Thermal Laminates are finished and decorated in the same way as Standard Wallboard and High Performance Plasterboard.
Knauf's Emma Olsen ascerts that calculations based on typical semi-detached (90m2), terraced (77m2) and detached (120m2) houses show that the payback period for electrically heated houses can be as short as 1–2 years, or 3–5 years on gas heated houses. Because, people tend to overheat their homes, actual paybacks may be slightly longer – but there will still be substantial savings. Depending on the size of house and whether they use gas or electricity for heating, homeowners could on this basis cut their energy costs by £75–£750 a year, and CO2 emissions by 500–2,775kg.
All Knauf Insulating Laminates are suitable for direct bonding using Knauf Bonding Compound to brick only, block only or brick/block external walls. 2 nailable plugs should also be used per board as an additional mechanical fixing.
They are ideal for use in new build and refurbishment projects and can be used in single or double leaf constructions.
Choose from ...
Thermal Laminate ...
Is a 9.5mm Knauf Vapourshield plasterboard combined with the same high quality expanded polystyrene.
Thermal Laminate is available in vapour check grade.
Thermal Laminate has a Thermal Conductivity figure for wallboard of k = 0.16W/mK, for Knauf Vapourshield of 0.18W/mK and for Expanded Polystyrene of 0.038W/mK.
Thermal Resistance:
22mm = 0.39m2 K/W
30mm = 0.60m2 K/W
40mm = 0.86m2 K/W
Thermal Laminate Plus ...
CFC-extruded polystyrene bonded to 9.5mm Knauf Wallboard means better thermal performance from thinner laminates than expanded polystyrene. This gives more internal space, as well as providing good vapour resistance.
Thermal Laminate Plus has a Thermal Conductivity figure for wallboard of k = 0.16W/mK and for Extruded Polystyrene of 0.030W/mK.
Thermal Resistance:
27mm = 0.71m2 K/W
35mm = 1.00m2 K/W
40mm = 1.19m2 K/W
45mm = 1.37m2 K/W
55mm = 1.75m2 K/W
Thermal Laminate Phenolic ...
CFC and HCFC-free phenolic foam bonded to 9.5mm Knauf Wallboard offers the highest thermal performance and has a vapour check incorporated within its construction. Phenolic Laminate gives you excellent performance, even in areas where condensation might be a problem.
Knauf Phenolic Laminate has a Thermal Conductivity figure for Vapourshield of 0.18W/mK and for Phenolic Foam of 0.022W/mK (60mm and 65mm boards) or 0.018W/mK (50mm boards).
Thermal Resistance:
50mm = 1.82m2 K/W
60mm = 2.36m2 K/W
65mm = 2.58m2 K/W
Knauf product composition ...
Knauf Plasterboard Laminates ...
are comprised in general of a core
of calcium sulphate dihydrate encased in paper liners onto
which various insulation materials are laminated. Minor
additives include starch, foaming agents and dispersants.
Thermal Laminate ...
is backed with an expanded
polystyrene. The expanded polystyrene contains residual
amounts of Pentane (<1%wt), Styrene Monomer and
Hydrogen Bromide (FRA Grades only).
Thermal Laminate Plus ...
is backed with an extruded polystyrene, which is a CFC free, closed-cell rigid
polystyrene board.
Knauf Phenolic Laminate ...
is backed with phenolic foam, which has a wet-lay glass-fibre tissue facing and a rigid
phenolic foam core.
Knauf product performance ...
Fire Performance
Gypsum is non-combustible. So, by definition, any of the Knauf plasterboard range is acknowledged to contribute to the fire resistance of the structure in which it is used.
Knauf Insulating Laminates are designated as Class O materials under the Building Regulations 1991, Approved document B. They also meet BS476: Part 6: 1989, With the fire propagation index I = 12 and under BS476: Part 7: 1987 surface spread of flame are designated Class 1. Specific Knauf Drywall Systems are fire tested in accordance with BS476: Part 20: 1987.
Acoustic Performance
All Knauf Plasterboards offer excellent sound reduction qualities, whether used in drywall systems for ceilings, wall linings, partitions and separating walls.
Plasterboard, as a single element, is not normally given a sound reduction figure. Specific Knauf Drywall Systems are tested in full accordance with BS EN ISO 140-3: 1995 and the values calculated in accordance with BS EN 717-1: 1996.
Vapour Performance
Knauf Vapour check Laminates have been tested to BS3177: 1959 and exceed the minimum requirement of 15MN s/g. Except for Thermal Laminate Plus 27.0mm and 34.5mm.
Limitations
Knauf Insulating Laminates are not suitable for areas which are subjected to extremes of temperature and humidity.
Temperature over 50°C can induce a change of state in the plasterboard which would reduce its physical performance and serviceability.
Humidity over 90% or subjection to excessive moisture would also reduce the serviceability of the plasterboard.
It is recommended that where PVC insulated cables are to be installed in contact with Knauf Insulated Laminates, for more than 500mm of their length, the cables should be encased in conduit, or a similar barrier, or should be de-rated in accordance with the IEE regulations, 16th, Edition.
Knauf Insulating Laminates must be secondary fixed with a minimum of 2 fixings, meeting the requirements of BS8212: 1995.
Storage on site
Plasterboards are supplied on timber bearers. Packs should be lifted with a fork lift-truck, and stacked not more than one high on a flat surface. They should be stored in a clean dry environment.
Note: If handling manually, consider risks as required by Manual Handling Operations Regulations 1992.
Health & Safety
Knauf Plasterboards must be handled with care; boards must be carried on their edges. When cutting ensure adequate ventilation.
Knauf plasterboards are not classified as hazardous under CHIP2 Regulations 1994 and the Control of Substances Hazardous to Health (COSHH) Regulations 1994.
Sitework
Thermal Laminates must be installed in full accordance with Knauf's recommendations and those of BS8212: 1995 and BS8000: Part 8: 1994. Screws should penetrate a minimum of 20mm into timber and 10mm into metal framing. Nails should penetrate timber framing by a least 25mm
Manufacturer's Contact Details
Knauf Drywall’s Technical Team can offer advice on the correct product combination to specify, based on SAP calculations to determine the relevant U-values.
Knauf Insulation Ltd., PO Box 10, Stafford Road, St Helens, Merseyside, WA10 3NS, England
Page last updated
Tuesday, June 1, 2010
