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Knauf Earthwool Building Slab (formerly Universal Slab)

Standard Knauf Product, depending upon the popularity of these products in your area, these products may be readily available at the lower densities, such as 45kg/m³ and 60kg/m³. As the slab densities increase, and product popularity declines, therefore lead times may apply.

Product Functions Celotex TB4000 installed in a wooden stud partition wall application

Knauf building slabs are multi-purpose insulation products suitable for a large variety of applications

Product Description

Knauf Earthwool Building Slabs are a range of rigid and semi-rigid, resilient, non-combustible rock mineral wool slabs, available in densities from 33 to 140kg/m . The standard products are supplied un-faced, but they can also be manufactured with a factory applied foil or tissue facing, they are also available in a water repellent grade.

Earthwool Building Slabs are a range of rigid and semi-rigid, resilient, non-combustible rock mineral wool slabs, available in densities from 33 to 140kg/m3. The standard products are supplied un-faced, but they can also be manufactured with a factory applied foil or tissue facing, they are also available in a water repellent grade.

Product Benefits

Wide range of densities
Non-combustible
Excellent thermal and acoustic insulation properties

Durability

Universal Slabs are odourless, non-hygroscopic, rot proof, do not sustain vermin and will not encourage the growth of fungi, mould or bacteria.

Environmental

Universal Slabs are free from CFCs, HCFCs and any other material with ozone depletion potential in their manufacture and content and represent no known threat to the environment. Universal Slab’s manufacture has a low impact on the environment and is classified as Zero ODP and Zero GWP.

Fire Performance

Universal Slabs are classified as non-combustible to BS 476: Part 4: 1970 (1984) and Euroclass A1, Class 1 Surface Spread of Flame to BS 476: Part 7 1997 and Class ‘O’ to the Building Regulations.

Moisture Resistance

Universal Slabs are non-wicking when tested to BS 2972: 1989: Section 12. When exposed to 90% relative humidity at 20°C, Universal Slabs absorb less than 0.004% of moisture.

Vapour Resistance

Universal Slabs have a vapour resistance of 7.00 MN.s/g.

Operating Temperatures

Universal Slabs can be used up to continuous operating temperatures of 850°C. This is dependent on density.

Handling and Storage

Universal Slabs are easy to handle and install, being lightweight and easy to cut to size.

Universal Slabs are supplied in packs in Supakube pallets.

For longer term outside storage (stock or site) the pallets should be stored under a secure waterproof covering.

Universal Slabs should not be left permanently exposed to the elements.




Product availability indicators

Knauf Earthwool Building Slabs - Price and Availability Advisory:

Presently there are no availability restrictions.

Excellent = Product Availability Excellent  Good = Product Availability Good  Fair = Product Availability Fair  Poor =  Product Availability Poor  Undetermined = Product Availability Undetermined
Availability relies on stock levels at closest depots and upon transport logistics to effect deliveries


Technical Data

Flexi Slab - 33kg/m³

Product Code

Thermal conductivity (W/mK)

Thermal resistance (m²K/W)

Length (mm)

Width (mm)

Slabs per Pack

Area per Pack (m²)

140 0.035 4 1200 600 3 2.16
100 0.037 2.7 1200 600 6 4.32
90 0.037 2.4 1200 600 6 4.32
70 0.037 1.85 1200 600 8 5.76
60 0.037 1.6 1200 600 10 7.2
50 0.037 1.35 1200 600 12 8.64
140 0.037 3.75 1200 400 4 1.92
100 0.037 2.7 1200 400 6 2.88
60 0.037 1.6 1200 400 10 4.8
50 0.037 1.35 1200 400 12 5.76

Building Slab RS33 - 33kg/m³

Product Code

Thermal conductivity (W/mK)

Thermal resistance (m²K/W)

Length (mm)

Width (mm)

Slabs per Pack

Area per Pack (m²)

70 0.037 1.85 1200 600 8 5.76
60 0.037 1.6 1200 600 10 7.2
50 0.037 1.35 1200 600 12 8.64
40 0.037 1.05 1200 600 14 10.08

Building Slab RS45 - 45kg/m³

Product Code

Thermal conductivity (W/mK)

Thermal resistance (m²K/W)

Length (mm)

Width (mm)

Slabs per Pack

Area per Pack (m²)

100 0.035 2.85 1200 600 5 3.6
75 0.035 2.1 1200 600 6 4.32
60 0.035 1.7 1200 600 8 5.76
50 0.035 1.4 1200 600 10 7.2
40 0.035 1.1 1200 600 12 8.64
30 0.035 0.85 1200 600 16 11.52
25 0.035 0.7 1200 600 20 14.4

Building Slab RS60 - 60kg/m³

Product Code

Thermal conductivity (W/mK)

Thermal resistance (m²K/W)

Length (mm)

Width (mm)

Slabs per Pack

Area per Pack (m²)

100 0.035 2.85 1200 600 4 2.88
75 0.035 2.1 1200 600 6 4.32
60 0.035 1.7 1200 600 7 5.04
50 0.035 1.4 1200 600 9 6.48
40 0.035 1.1 1200 600 12 8.64
25 0.035 0.7 1200 600 18 12.96

Building Slab RS100 - 100kg/m³

Product Code

Thermal conductivity (W/mK)

Thermal resistance (m²K/W)

Length (mm)

Width (mm)

Slabs per Pack

Area per Pack (m²)

100 0.035 2.85 1200 600 3 2.16
75 0.035 2.1 1200 600 4 2.88
50 0.035 1.4 1200 600 6 4.32
40 0.035 1.1 1200 600 7 5.04
30 0.035 0.85 1200 600 10 7.2
25 0.035 0.7 1200 600 12 8.64

Building Slab RS140 - 140kg/m³

Product Code

Thermal conductivity (W/mK)

Thermal resistance (m²K/W)

Length (mm)

Width (mm)

Slabs per Pack

Area per Pack (m²)

100 0.035 2.85 1200 600 2 1.44
75 0.035 2.1 1200 600 3 2.16
50 0.035 1.4 1200 600 4 2.88
40 0.035 1.1 1200 600 5 3.6
30 0.035 0.85 1200 600 7 5.04

Thermal Properties

The thermal conductivity of Earthwool Building Slabs varies with density from 0.035 to 0.037W/mK.

Fire Resistance Properties

Earthwool Building Slabs are classified as Euroclass A1 to BS EN 13501-1

Product Information and Certification

Links to manufacturer's information. Click to download in a separate browser window.

Knauf Universal Slab Datasheet | Knauf Earthwool Flexi Slab Datasheet | Knauf Earthwool Handy Guide |

 

Knauf Building Slab Range - Certification

Earthwool Building Slabs are manufactured in accordance with BS EN 13162,ISO 50001 Energy Management Systems, OHSAS 18001 Occupational Health and Safety Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, as certified by Bureau Veritas.

Knauf Insulation Products CE Markings

Important to note is that products that are currently CE marked or have been CE marked before July 1st 2013 are deemed to comply automatically with the CPR (Construction Products Regulation). All of Knauf Insulations building insulation products are CPR ready, additionally the CPR does not apply to fire protection and acoustic insulation products so they are unaffected by this new legislation.

The most important part of the CPR is the Declaration of Performance (DoP) which contains all of the key information about a product`s characteristic`s, when compiling the DoP the product manufacturer assumes responsibility that the product is in confirmation with its declared performance characteristics.
Knauf Insulation can provide a DoP for each product which can be able to find online via a unique web address to be found on the product label, packaging or invoice - this is not a service that we undertake on Knauf's, our our customer's behalf.


  • DriTherm Cavity Slabs

    Non-combustible, water repellent, glass mineral wool Cavity Wall slabs. 455mm wide to suit standard vertical wall tie spacings

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    Earthwool DriTherm Cavity Slabs are semi-rigid or rigid slabs of non-combustible, water repellent, glass mineral wool. They are 455mm wide to suit standard vertical wall tie spacings, ensuring a closed joint with adjacent slabs.
  • Rockwool RW Slabs

    Thermal / acoustic slabs suitable for roofs, ceilings, walls, partitions, floors, and can be fitted between timber and metal frames.

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    RW Slab Range is used for thermal, acoustic and fire insulation in general building applications. The product range consists of high quality resin bonded slabs in a variety of thicknesses and densities.
  • Acoustic Partition Rolls

    Designed for metal and timber stud partitions, APRs are flexible, resilient, unfaced roll of glass mineral wool.

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    Isover Insulation acoustic insulation rolls have been especially developed to utilise the sound absorption properties of glass mineral wool
  • Earthwool Loft Rolls

    Ceiling joist level loft rolls that are flexible, lightweight, low density, resilient and non-combustible glass mineral wool quilts.

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    Knauf Insulation have specially designed our loft insulation products for the thermal insulation of loft and attic spaces, when insulating at ceiling level between or above joists

Product Installation

Knauf Insulation Building Slab Installation Examples

Example: Building a bedroom extension above an existing garage.

Building an extension to create a new first storey over an existing attached single-storey garage built with masonry cavity walls. The external walls and the pitched roof of the extension are new build. The roof of the garage has to be removed and a new intermediate floor constructed with deeper floor joists and at a level to coincide with the first floor of the house.

In order to minimise the additional load on the existing foundations, the example applies timber frame for the inner leaf of the external walls of the second storey, and raises the brick facing of the garage to be the outer leaf of the timber frame structure.

The floor structure will be timber joists and the roof will be insulated at ceiling level. The example proposes U-value of 0.30 W/m2K for the new external walls exceeds the standard elemental U-value of 0.28 W/m2K for new wall elements, but the area-weighted average heat loss for the thermal elements is less than using the standard elemental U-values

Pitched roof

Roof insulated with two layers of Earthwool Loft Roll 40, 100mm between the ceiling joists and 200mm over the ceiling joists achieves a U-value of 0.13 W/m2K.

External wall

Cavity wall with brick outer leaf and insulated timber frame system with 90mm Earthwool FrameTherm 32between the studs and a low emissivity breather membrane achieving a U-value of 0.30 W/m2K.

New floor

Two layers of 100mm Earthwool Flexible Slab between 200mm deep timber joists at 600mm centres achieves a U-value of 0.19 W/m2K.



Contact Manufacturer

Knauf Insulation Limited

PO Box 10, Stafford Road, St Helens, Merseyside, WA10 3NS

Knauf Technical Advisory Service

Telephone: +44 (0) 1744 766666 - Fax: +44 (0) 1744 766667
Email: technical.uk@knaufinsulation.com
Web sites: Knauf Home Page / Knauf Insulation Solutions iPad App.

Contact us

Insulation Online Limited

27 Massetts Road, Horley, Surrey, RH6 7DQ, UK

Telephone: 0333 8000 828

Facsimile: 0333 7000 797

Email: enquiries@insulation-online.com

Web site: www.insulation-online.com

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