Application Overview
A partial fill cavity features thermal insulation secured back to the inner SFS frame, leaving a cavity of air between the insulation and the masonry outer leaf, and can be used on buildings of any height.
The cavity between the insulation and the outer leaf performs as a barrier to external moisture, preventing it from tracking to the inner construction.
In addition to thermal performance, fire performance of insulation materials is a crucial consideration, particularly when designing buildings over 18m in height or when the building is to have high occupancy levels or be used by vulnerable occupants.
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WHY MINERAL WOOL?
Non-combustible, being suitable for use on all buildings including those above 18m in height providing compliance with fire related building regulations.
Contributes to building regulation compliance without reliance on separate testing or desktop studies.
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Typical U-values
Using Knauf Insulation RainScreen Slab
102.5mm Brick Outer Leaf K=0.770 | 102.5mm Brick Outer Leaf K=0.770 | 100mm Dense Block Outer Leaf K=1.210 | 100mm Dense Block Outer Leaf K=1.210 | 100mm Medium Block Outer Leaf K=0.510 | 100mm Medium Block Outer Lea K=0.510 | 100mm Aircrete Block Outer Leaf K=0.150 | 100mm Aircrete Block Outer Leaf K=0.150 | |
Rainscreen Slab (mm) | 100mm SFS | 150mm SFS | 100mm SFS | 150mm SFS | 100mm SFS | 150mm SFS | 100mm SFS | 150mm SFS |
50 | 0.27 | 0.23 | 0.27 | 0.23 | 0.26 | 0.22 | 0.23 | 0.20 |
75 | 0.22 | 0.19 | 0.22 | 0.20 | 0.22 | 0.19 | 0.20 | 0.18 |
100 | 0.19 | 0.17 | 0.19 | 0.17 | 0.19 | 0.17 | 0.18 | 0.16 |
120 | 0.17 | 0.15 | 0.17 | 0.15 | 0.17 | 0.15 | 0.16 | 0.14 |
150 | 0.15 | 0.13 | 0.15 | 0.14 | 0.15 | 0.13 | 0.14 | 0.13 |
180 | 0.13 | 0.12 | 0.13 | 0.12 | 0.13 | 0.12 | 0.13 | 0.11 |
200 | 0.16 | 0.14 | 0.16 | 0.14 | 0.16 | 0.14 | 0.15 | 0.13 |
210 | 0.16 | 0.14 | 0.16 | 0.14 | 0.15 | 0.13 | 0.15 | 0.13 |
NOTE: 1.2mm Gauge SFS at 600mm centers, fully filled with OmniFit Slab (0.035 W/mK). 2x15mm Standard wallboard internal finish. Rainscreen Slab installed with 50mm residual cavityusing using Ancon 25/14 restraint system. Ancon tube (compression sleeves) installed >180mm which is reflected in the calculations.
The above values are for guidance only, please contact our Technical Service Team direct for specific values – all of our calculations for Rainscreen Facade Systems are carried out to BS EN 10211 using compliant software.
We provide FREE 3D U-value calculations for rainscreen façade systems Contact our Technical Support Team for details on 01744 766 666 or technical.uk@knaufinsulation.com
Did you know...
That we have a CPD dedicated to rainscreen façade systems?