Rainscreen Duo-slab
ProductRockwool Rainscreen Duo-slab is a dual density slab which has been specifically developed for insulation behind rainscreen cladding systems and also for sealed cladding systems such as curtain wall and other over cladding systems. UsageThe slab is designed for use in conditions of severe climatic exposure. Because of its unique dual density construction, the product requires fewer fixings, thus providing a cost effective solution in overcladding applications. |  |
Effective, non combustible thermal insulation for rainscreen and overcladding applications Advantages• Designed for use on high rise buildings
• High resistance to wind and rain during construction
• Fewer fixings required for installation – compared to standard mineral wool slabs
• Robust front face resists damage and overdriving of fixings Standards and approvalsRainscreen Duo-slab satisfies the requirements ofBS EN 13162: 2001 ‘Thermal insulation products for building – Factory made mineral wool (MW) products – specification’. DescriptionRainscreen Duo-slab is a dual density slab comprising arobust outer surface (designed to withstand the rigoursimposed on site), and a resilient inner face (designed toaccommodate the substrate to which it is being applied).The robust outer surface offers improved weather resistanceand a more clearly defined cavity width, whilst the resilientinner surface accommodates itself to irregularities in thesurface of the substrate, thus maximising thermal performance. The slabs will knit together when tightly butt jointed so thatway extraneous heat loss caused by gaps is eliminated.This also prevents water transmission through the insulationlayer and is proven over 25 years in traditional masonry wall construction. The slab is designed for use in conditions of severe climaticexposure. Because of its unique dual density construction, theproduct requires fewer fixings, thus providing a cost-effective solution in overcladding applications. Dimensions
Standard size of 1000 °— 600 mm and is available inthicknesses from 50 mm up to 150 mm. For other thicknesses please contact Rockwool. Performance and propertiesFire
Rated A1 when tested to EN 13501-1 classification using testdata from reaction to fire test. Wind resistance
Rainscreen Duo-slab fixed as indicated in Figure 1 (opposite)has successfully undergone wind resistance testing by theBuilding Research Establishment. Windloading fatigue testswere used to simulate the performance of the slabs when fullyexposed and subjected to fluctuating wind loads during theconstruction stages of buildings. The tests simulated andexceeded the maximum UK basic wind speed of 56 m/s asdefined by BS CP3: Chapter 5: Part 2: 1972. Test report BRE GI2801 Water resistance
Rockwool mineral wool repels liquid water due to its fibreorientation and the presence of water repellent additives. Acoustic Performance
The slabs can significantly improve the acoustic performanceof the external building structure. Condensation control
Vapour resistivity = 5.9 MNs/gm. The slabs, therefore reduce therisk of condensation, allowing natural drying out of the structure. 
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