ROCKWOOL Thermal Insulation Cavity Slab 32 is a full and partial fill stone wool slab designed for the thermal insulation of masonry cavity walls.
Suitable for use in new builds, renovations or extensions, the lightweight slabs are easy to handle and simple to install providing an accurate fit against the blockwork.
ROCKWOOL Cavity Slab 32 has a more efficient fibre structure that increases the density of air pockets trapped within each slab. This results in an improved thermal performance when compared to typical stone wool products.
- Low thermal conductivity of 0.032 W/mK.
- ROCKWOOL Cavity Slab 32 is able to resist temperatures of over 1,000ºC achieving the highest Euroclass A1 non-combustibility classification as defined in EN13501-1.
- The slabs come in a 455mm width to suit standard vertical wall tie spacings allowing a closely knitted joint with adjacent slabs.
Specification
NBS Clauses | Length (mm) | Width (mm) | *Approved thickness range (mm) |
1200 | 455 | 100 |
*Thickness options may be subject to a minimum production volume. Speak to the specification team for guidance.
Standards and Certification
Product Standards | BS EN 13162 |
CE Marking / UKCA | Yes |
BBA Approved | Certificate 22/6335 |
Technical Properties
Reation to Fire | Euroclass A1 (BS EN 13501-1) |
Thermal Conductivity | 0.032 W/mK |
Water Repellent | Yes |
Thermal Performance
Full Fill Application
102mm facing brick outer skin, ROCKWOOL Thermal Insulation Cavity Slab 32 Full Fill, 100mm internal concrete block (various densities) Internal finishes: plasterboard on dab.
Inner Block |
Dense 1900-2250kg/m³ (1.130 W/mK) |
Medium Dense 1400-1450kg/m³ (0.470 W/mK) |
Aircrete Hi Strength 750kg/m³ (0.190 W/mK) |
Aircrete Std 600kg/m³ (0.150 W/mK) |
Cavity (mm) | U-value (W/m²K) | |||
100 | 0.27 | 0.26 | 0.25 | 0.24 |
Partial Fill Application
102mm facing brick outer skin, 50mm clear cavity space, ROCKWOOL Thermal Insulation Cavity Slab 32, 100mm internal concrete block (various densities) Internal finishes: plasterboard on dab.
Inner Block |
Dense 1900-2250kg/m³ (1.130 W/mK) |
Medium Dense 1400-1450kg/m³ (0.470 W/mK) |
Aircrete Hi Strength 750kg/m³ (0.190 W/mK) |
Aircrete Std 600kg/m³ (0.150 W/mK) |
Cavity (mm) | U-value (W/m²K) | |||
100 | 0.26 | 0.25 | 0.24 | 0.23 |