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Knauf Insulation - Rocksilk® Flat Roof Slab Extra - Flat roof insulation - Rock Mineral Wool Slab

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Knauf Insulation Ltd

A rock mineral wool insulation slab with the highest mechanical performance in the range, developed for flat roof insulation in mechanically-fixed applications onto all types of roof deck.

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Application

Rocksilk® Flat Roof Slabs are used for the thermal insulation of flat roofs.


Rocksilk® Flat Roof Slabs are suitable for use under all kinds of single ply membrane, hot applied bitumen systems and mastic asphalt and are suitable for maintenance foot traffic only.


Rocksilk® Flat Roof Slabs are suitable for use as an upstand board in warm roof applications when installed with the fixings and waterproof layer as detailed by the membrane manufacturer.

Description

Knauf Insulation Rocksilk® Flat Roof Slab Extra is a rock mineral wool insulation slab with the highest mechanical performance in the range, developed for flat roof insulation in mechanically-fixed applications onto all types of roof deck.


It is non-combustible with the best possible Euroclass A1 reaction to fire classification, and is manufactured using Knauf Insulation's Krimpact® Technology.


Features and benefits:

  • Good thermal performance.
  • Non-combustible A1 Euroclass Reaction to Fire classification.
  • Slabs contain a special additive to ensure their water repellency.
  • Manufactured using Knauf Insulation's Krimpact® Technology for high levels of compressive strength and durability.
  • Excellent sound absorption and reduction characteristics.
  • The nature of Rock mineral wool allows slabs to knit together at joints.
  • Dimensionally stable.
  • Compatible with a wide range of single ply membranes.
  • `C` generic BRE Green Guide rating.
  • Indoor Air Quality - Eurofins Gold achieved.


Standards and Certification:

Rocksilk® Flat Roof Slabs have been assessed by the British Board of Agrément (BBA) under Certificate 08/4526 for use as a thermal insulation layer on limited access flat roofs with concrete, timber or metal decks. The certification offers contractors and specifiers utmost confidence that Rocksilk® Flat Roof Slabs are fit for their intended use and will have a life equivalent to that of the roof structure in which it is incorporated, provided that it is stored and installed correctly. Rocksilk® Flat Roof Slabs are manufactured in accordance with BS EN 13162, ISO 50001 Energy Management Systems, ISO 14001 Environmental Management Systems, and ISO 9001 Quality Management Systems, as certified by TÜV Nord.


Real performance:

Glass and Rock Mineral Wool are easier to install correctly than other insulants such as rigid boards because they adapt to any slight imperfections in the substrate and knit together, eliminating any air gaps. Evidence shows the absence of air gaps is crucial to achieving real performance in the relevant application.


Environmental:

Rocksilk® Flat Roof Slabs contain no ozone-depleting substances or greenhouse gases. For further environmental information consult the relevant Environmental Product Declaration, available on our website.


Moisture:

The physical and chemical characteristics of the fibres are unaltered by wetting. Therefore the thermal properties of Rocksilk® RainScreen Slab are not affected by exposure to moisture and the product will perform as expected once dry.


Handling and storage:

Rocksilk® Flat Roof Slabs are easy to handle and install, being lightweight and easily cut to size, where necessary. Rocksilk® Flat Roof Slabs are supplied loose on a hooded (4-LDPE) pallet which is designed for short term protection only. For longer term protection on site, the product should either be stored indoors, or under cover and off the ground. Rocksilk® Flat Roof Slabs should not be left permanently exposed to the elements.

General information

Color

Brown

Finish

Unfinished

Material

Rock mineral wool

Shape

Rectangle

Slab

Length

1200 mm

Width

1000 mm

Height

95 mm

105 mm

125 mm

150 mm

Uniclass

Pr_25_57_06_53 Mineral wool insulationPrimary

CAWS

J42/425 Mineral wool (MW) insulation

J42/27 Thermal insulation

J42/23 Mineral wool insulation boards

Product range

Warm Flat Roofs

Specification data - Mineral wool insulation

Standard

To BS EN 13162.

Third-party certification

BBA Certificate 08_4526 Rocksilk Krimpact Flat Roof Slab.
Euroclass A1 Reaction to Fire Classification.
CE Marking.
Green Guide Rating C.
EPD (EN 15804+A2).
EUCEB.
Made in Britain.

Form

Slab.

Facing

Unfaced.

Thickness (minimum)

95 mm.

105 mm.

125 mm.

150 mm.

Width (nominal)

1000 mm.

Thermal conductivity (maximum)

0.039 W/m·K.

Fire performance

Euroclass A1 to BS EN 13501-1.

Recycled content

50%.

Vapour resistivity

5.00 MN·s/g·m.

Water absorption

<1kg/m2.

Short term water absorption, WS: <1kg/m2, Tested in accordance with BS EN 1609.

Dimensional stability

Tested in accordance with BS EN 1603, stable.

Compressive strength (mean value)

90 kPa.

Suitable substrates

Concrete, Metal, Timber, Plywood; OSB.

Refer to manufacturer for fixing details.

Acoustic performance

Rainfall 37-45.6LiA dB, Airbourne 39-52Rw dB.

Refer to manufacturer for guidance.

FM approved

Approval Identification: 0003063483/ RR229016.

Environmental Product Declaration (EPD)

In accordance with BS EN 15804+A2.

EPD available.

Green guide rating

C.

U-value

Calculations should be created using 2D or 3D modelling programs which comply with the methodologies detailed in BS EN ISO 10211.

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Durability

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

The product will have a life equivalent to that of the wall structure in which it is incorporated.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

26.9 kg CO₂ eq/kg

1m² of Rock Mineral Wool Rocksilk® Flat Roof Slab Extra with a thickness of 105 mm with R value of 2.69 m2K/W.

Recyclability

Recyclable

Mineral wool products from Knauf Insulation can be and in some cases are partly recycled at their end of-life, please contact supplier for more information.

Recycled content

50 %

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Literature

Knauf Insulation Rocksilk® Flat Roof Slabs - Product Datasheet

Knauf Insulation Rocksilk® Flat Roof Slabs - Product Datasheet

Rock Mineral Wool - BREEAM Helpsheet

Rock Mineral Wool - BREEAM Helpsheet

Rock Mineral Wool with ECOSE® Technology - Safety Datasheet

Rock Mineral Wool with ECOSE® Technology - Safety Datasheet

Knauf Insulation Solutions Guide

Knauf Insulation Solutions Guide

Knauf Insulation Rocksilk® Flat Roof Slab - BBA Certificate 08/4526

Knauf Insulation Rocksilk® Flat Roof Slab - BBA Certificate 08/4526

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