Verified by manufacturer 2 months ago
RockSilk® Building Slab RS45
A rock mineral wool insulation slab, designed for use in multiple applications providing thermal, fire protection and acoustic insulation.
Rocksilk® Building Slabs are multi-application products for use in built-up metal roofs and walls, pitched roof constructions between rafters, intermediate floors, separating floors, internal stud partitions and light steel frame infill. Rocksilk® Building Slabs are used extensively in OEM applications for fabrication of thermal, acoustic and fire products.
Knauf Insulation Rocksilk® RS45 is a rock mineral wool insulation slab, designed for use in multiple applications providing thermal, fire protection and acoustic insulation. It is non-combustible, achieving the best possible Euroclass A1 reaction to fire classification and is manufactured using Knauf Insulation's unique bio-based binder, ECOSE® Technology.
Rock mineral wool
J21/23 Mineral wool insulation boards
J31/23 Mineral wool insulation
J41/23 Mineral wool insulation boards
J42/23 Mineral wool insulation boards
H11/780 Thermal insulation
J21/425 Mineral wool insulation
H90/400 Thermal insulation
H92/776 Thermal insulation
H30/311 Mineral wool thermal insulation
H30/310 Mineral wool thermal insulation
H31/271 Mineral wool thermal insulation
J31/334 Mineral wool insulation
J41/425 Mineral wool (MW) insulation
H30/40 Thermal insulation
H31/50 Mineral wool thermal insulation
P10/50 Insulation supported between joists
P12/40 Mineral wool rigid batts
J31/26 Thermal insulation
J41/26 Thermal insulation
J42/27 Thermal insulation
J42/425 Mineral wool (MW) insulation
P10/250 Insulation supported between floor joists
P12/360 Mineral wool rigid batts
To BS EN 13162.
Thermal conductivity (maximum)
Euroclass A1 to BS EN 13501-1.
Knauf's rock mineral wool is manufactured using around 35% recycled content (recycled material mostly from the steel industry along with customer production waste).
Vapour barrier vapour permeability
Short term water absorption, WS: <1 kg/m², tested in accordance with BS EN 1609.
Environmental Product Declaration (EPD)
In accordance with BS EN 15804+A2.
Green guide rating
Products manufactured with ECOSE® Technology generate low levels of dust, VOCs and contain no added formaldehyde or phenol.
Calculations should be created using 2D or 3D modelling programs which comply with the methodologies detailed in BS EN ISO 10211.
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.
Contains Red List materials
Country of material origin
Country of product manufacture
A1-A3 (production stage) as defined in BS EN 15804
7.14 kg CO₂ eq/kg
1 m² of Rock Mineral Wool Rocksilk® RS45 with a thickness of 120 mm.
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.
NBS BIM object standard
This BIM object has been authored to meet the requirements of the NBS BIM object standard.
Find out more about the NBS BIM object standard.
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