ROCKWOOL RAINSCREEN DUO SLAB
RAINSCREEN DUO SLAB is a dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory- applied water repelling agent, acts to resist rain ingress during construction.
RAINSCREEN DUO SLAB®
Effective non-combustible thermal and acoustic insulation for ventilated façades
RAINSCREEN DUO SLAB is a dual-density insulation specifically developed for use within ventilated cladding systems, as well as sealed systems such as curtain walling. Once installed, the robust outer surface of the slabs, in combination with a factory- applied water repelling agent, acts to resist rain ingress during construction.
RAINSCREEN DUO SLAB is a dual- density insulation, meaning that the outer layer of each slab is manufactured to a higher density than the remainder of the product. This results in a robust outer surface designed to withstand the rigours imposed on site, and a resilient inner face designed to accommodate any irregularities in the substrate.
A water-repelling agent is added to the product during manufacture, which in combination with a robust outer surface and random fibre orientation, prevents water transmission through the insulation layer. As such the slab is well-designed for use in conditions of severe climatic exposure.
The product can be easily fitted around brackets and other awkward details, and when tightly butt jointed the fibres of adjacent slabs will knit together to provide a continuous thermal performance – eliminating heat losses that could otherwise be caused by gaps and joints.
Its unique dual-density construction also means that RAINSCREEN DUO SLAB requires fewer fixings, making it a cost- effective solution that is quick to install.
Applications
RAINSCREEN DUO SLAB is designed for use within ventilated cladding systems, as well as sealed systems such as curtain walling.
Frequently Asked Questions
Why is RainScreen Duo Slab dual density?
The robust outer face helps the slab resist damage during installation, while the softer inner face can accommodate minor substrate irregularities. Correct fixing and close-butting remain necessary to maintain insulation continuity.
Does the water-repellent treatment make it waterproof?
No. The factory-applied water repellency helps resist incidental moisture during construction, but the slabs are not a substitute for the façade’s weather-control layers. Wet or damaged insulation should be assessed before it is enclosed.
Which cladding systems can use the product?
ROCKWOOL lists ventilated rainscreen, sealed cladding and selected masonry or framed wall systems within its BBA scope. Brackets, fixings, membranes, cavity barriers and the supporting wall must be designed as a coordinated assembly.
What fire classification does it provide?
The current product documentation should be used for the board’s reaction-to-fire classification. Compliance of the external wall also depends on the cladding, membranes, substructure, cavity barriers, building height and Irish fire strategy.
What acoustic performance can be expected?
Stone wool can contribute to airborne-sound reduction within a complete tested wall. A figure such as Rw 62 dB applies only to the specific wall construction tested and should not be presented as a standalone slab rating