Polycomp Products Limited

PART 1 - INTRODUCTION

1.1

Rockwool Roll is a medium density multi-use insulation mat.

It is a semi-perforated roll guiding the user to accurate cut widths of 400mm, 600mm or 1200mm from one product.

This versatile Roll is suitable for thermal insulation of roof spaces in domestic, commercial and industrial buildings. It is also useful for improving the acoustic performance of suspended ceilings.

1.2 Advantages

• Multi-application product
• Fire, thermal and acoustic properties
• Easy to use for 400 and 600 mm centres
• Higher density provides superb fit

PART 2 - PRODUCT DESCRIPTION

2.1 Dimensions

Rockwool Roll is manufactured semi-split at 400 mm (× 3) 600mm (× 2) or 1200mm (× 1).

Thickness*	Roll length
100 mm	4800 mm
150 mm	3200 mm
170 mm	2800 mm

2.2 Standards & Approvals

Rockwool Roll conforms to BS EN 13162:2001 'Specification for factory-made mineral wool products'.

PART 3 - PERFORMANCE AND PROPERTIES

3.1 Fire Classification

Rockwool Roll achieves a reaction to fire classification of A1 as defined in BS EN 13501-1.

3.2 Acoustic

The incorporation of Rockwool Roll within suitably designed constructions can provide improved levels of sound reduction.

3.3 Compatibility

Rockwool will not react with any metal components in the loft, nor will it cause loss of plasticiser from PVC cables and pipes (see also the note on electrical cables below).

3.4 Watertanks

Insulation should not be placed directly under the cold water tank. Where access is required to water tanks etc, supports should be provided for a raised walkway.

3.5 Loft hatches

To preserve continuity of insulation, covers to loft hatches should be insulated with a minimum 100mm thickness of Rockwool Roll. Double-sided adhesive tape may be used to hold the insulation in place.

3.6 Electrical cables

The IEE Wiring Regulations, 16th edition, British Standard BS 7671: 2001 and the Electricians' Handbook (latest edition) give guidance on the correction factors to be applied in down-rating cables according to situation, and each case should be separately calculated. Where possible, all cables should be lifted free of the insulation.

3.7 Handling and storage

Rockwool Roll is very light and easy to handle. It is supplied compressed in polyethylene wrappings which provide short term protection. For long term protection the roll must be stored indoors or under a waterproof covering.

3.8 Environment

Rockwool insulation relies on entrapped air for its thermal properties; air is not a VOC and it does not have Global Warming Potential (GWP) or Ozone Depleting Potential (ODP).

PART 4 - THERMAL PERFORMANCE

4.1 Thermal Performance

Rockwool Roll has a thermal conductivity (k value) of 0.044 W/mK.

4.2 Installation

Part L: 2006 edition requires new pitched roofs with loft spaces to achieve U-values between 0.16 W/m²K and 0.11 W/m²K.

To meet this thermal performance and minimise heat loss through the timbers, Rockwool Roll should be cross-layered between and over the ceiling joists.

The first layer (generally of 100mm thickness) is rolled between the ceiling joists, which are normally spaced at 400mm or 600mm centres. A second layer of Rockwool Roll (e.g. 170mm thick) is then cross-layered to cover the first layer of insulation and the ceiling joists.

If upgrading loft insulation, check to see if existing insulation between joists is tightly butt jointed to sides of timber. If not, remove and replace as above. If the existing insulation is in good condition, cross-layer this with a minimum of 170mm Rockwool Roll.

4.3 U-values

100mm Rockwool Roll between joists (with the additional thickness of Rockwool Roll laid over joists shown in table below).

Ceiling Joist	38 × 100 mm		47 × 100 mm
Joist spacing	400 mm	600 mm	400 mm	600 mm
Insulation Thickness over joists	U-values		U-values
100 mm	0.22 W/m2K	0.21 W/m2K	0.22 W/m2K	0.21 W/m2K
150 mm	0.17 W/m2K	0.17 W/m2K	0.17 W/m2K	0.17 W/m2K
170 mm	0.16 W/m2K	0.16 W/m2K	0.16 W/m2K	0.16 W/m2K
200 mm (100+100)	0.15 W/m2K	0.14 W/m2K	0.15 W/m2K	0.14 W/m2K
250 mm (150+100)	0.12 W/m2K	0.12 W/m2K	0.13 W/m2K	0.12 W/m2K
300 mm (150+150)	0.11 W/m2K	0.11 W/m2K	0.11 W/m2K	0.11 W/m2K

PART 5 - HEALTH AND SAFETY

Current HSE 'CHIP' Regulations and EU directive 97/69/EC confirm the safety of Rockwool mineral wool; Rockwool fibres are not classified as a possible human carcinogen.

The maximum exposure limit for mineral wool is 5mg/m³, 8 hour time-weighted average.

A Material Safety Data Sheet is available from the Rockwool Marketing Services Department to assist in the preparation of risk assessments, as required by the Control of Substances Hazardous to Health Regulations (COSHH).