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RockShield

Product

The Rockwool RockShield system fulfils the triple function of thermal insulation,weather protection and aesthetic improvement. The system offers a choice of options in insulation thickness and fixing methods to meet different substrate conditions. RockShield decorative coats and specially developed paints are available in a choice of textures and a wide range of colours, so that a finish appropriate to the building character, context and type may be achieved.

Rockwool’s complete high performance external wall insulation. Suitable for insulating, weatherproofing and decorating all wall types.

Advantages

• Fire safe, Euroclass A2
• Dimensionally stable
• Low maintenance
• Wide range of colourfast finishes
• Removes cold bridges

Standards and approvals

Rockwool RockShield has been extensively used for both new-build and refurbishment schemes, and on a wide range of building types.

Rockwool RockShield systems have been approved by the BBA (Certificate No. 90/2437) and by the Institute of Bautechnik in Germany. The systems are also registered with the Insulated Render and Cladding Association (INCA).

Rockwool RockShield meets the requirements for the NHBC on masonry substraits subject to individual assessment.

Insulation options

Rockwool RockShield Rigid Slabs
Sized 1200 °— 600 mm, RockShield rigid slabs are available in thicknesses of 30mm to 200mm in 10mm increments. Rigid slabs are adhesive and mechanically fixed.

Rockwool RockShield Facade Lamellas
Facade Lamellas are 1000 °— 200mm and are available in thicknesses from 30mm to 300mm in 10mm increments. They are generally adhesive fix and may therefore be used on substrates that are problematical for mechanical fix. They are ideally suited to new-build constructions with a height limit of 20m.

Base coat options

RockShield TC
Rockwool RockShield TC is a thin coat system with a total thickness of between 6 and 8mm.

RockShield LW
Rockwool RockShield LW is a thicker coat system with a total thickness of between 8 and 12mm (it can be applied up to 20mm thick) offering a higher level of tolerance on uneven substrates.

Both RockShield TC and RockShield LW can be classified as thin coat systems which have a high degree of flexibility and are not subject to the temperature stresses which are imparted to thick, sand/cement renders. Both RockShield systems include glass fibre reinforcing mesh for added strength.

High Impact Coat

For areas which are likely to be subject to high levels of impact, an additional high impact coat can be applied to both the above systems.

Decorative coat options

Silcoplast
Silcoplast represents a state of the art development of plaster formulation. It is based on quartz, a natural, weather-resistant material, using an organic binder.

Silcoplast’s excellent vapour permeability properties enable the total RockShield system to breathe, helping to eliminate condensation problems. Because of its highly water repellent nature, any contamination of the surface is washed away by
rainwater, thus retaining the colour intensity of the finish. It is supplied in 25 kg tubs, ready mixed, ensuring perfect colour matching.

The Silcoplast decorative coat is available in two finishes:

(1) grained texture

(2) dragged texture

Colours

Both decorative coat finishes are supplied in a wide range of standard colours as well as BS 4800 colours. Formulations can also be made to specific colour requests. Colour charts are available on request from Rockwool’s Marketing Services department.

Textured finishes

Silcoplast is available in a grained texture of three grain sizes: 1.5mm, 2.5mm and 3.5mm and dragged texture two grain sizes 2 mm and 3 mm.

Paint finishes

Colorsil

Colorsil paint is a silicon-based paint available in all the same colours as the decorative coats. It is totally water resistant and highly vapour permeable.

Properties

Typical weights for Rockwool RockShield systems (70 mm Rockwool)

System	Weights (kg/m2) TC	LW
Adhesive mortar	4.5	4.5
Rockwool slab	9.8	9.8
Base coat	4.5	7.5
Decorative coat*	3.5	3.5
Total	22.3	25.3

* Decorative coat weight will alter with grain size

Fire
When tested to the new European Fire Classification, the RockShield system is likely to achieve a Euro Class ‘A2’ for reaction to fire. The core Rockwool insulation will achieve ‘A1’.

‘U’ values

Insulation thicknesses relating to typical wall constructions are shown below.

Condensation control

When calculating vapour diffusion through a structure, the vapour resistance of Rockwool is 5.9 MNs/gm. The vapour resistivity of the combined Rockwool RockShield base coat and decorative coat is 9 MNs/gm.

Environment

No CFCs, HFC’s or HCFCs are used in the manufacture of Rockwool materials.

Compression

The System will, without being damaged, support ladders, with a spreading board being used for normal maintenance work.

U values (W/m2K)
Rockshield Slab Thickness (mm)	Masonry construction options
	Dense block λ = 1.13 w/mK Thickness (mm)		Mid dense block λ = 0.51 w/mK Thickness (mm)		Lightweight block λ = 1.19 w/mK Thickness (mm)		Brick Solid Thickness (mm)	Brick / Block 50mm Cavity Thickness (mm)
	140	215	140	215	140	215	255	102 (Brick) / 100 (Block)
70	0.45	0.43	0.42	0.40	0.35	0.32	0.40	0.41
80	0.40	0.39	0.38	0.36	0.32	0.29	0.36	0.38
90	0.36	0.35	0.34	0.33	0.30	0.27	0.33	0.35
100	0.33	0.32	0.31	0.30	0.28	0.25	0.30	0.32
110	0.30	0.30	0.29	0.28	0.26	0.24	0.28	0.30
120	0.28	0.27	0.27	0.26	0.24	0.22	0.26	0.28

Impact resistance

Rockwool RockShield has been tested by a 25 mm punch method and achieved an ultimate strength figure of 1000 N. The following materials and constructions are shown for comparison:

13mm wood fibreboard on battens	150 N
13mm gypsum plasterboard on battens	300 N
8mm asbestos cement sheet on battens	550 N
Rockwool Shield	1000 N

Rain resistance

Rockwool mineral wool is inherently water repellent, and this property is enhanced by special additives. RockShield base coats, decorative coats and specially developed paints are also highly water resistant.

Durability

It is essential that the basic structure is sound and in good repair. It is recommended that a suitable damp-proof course be installed, if none exists in the original structure.

The Rockwool RockShield system is stable and will ensure continuing high performance. Rockwool slabs have been proved in service for over 50 years in all types of exposure.

The base coats and decorative coats employed in the RockShield system have been used with great success for over 19 years within the UK, and for in excess of 25 years on the Continent.

Rockwool RockShield has undergone successful accelerated ageing tests simulating 25 years of exposure. Life expectation is in excess of 50 years without any major maintenance.

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