Rocksilk Duct Slab
For the Thermal and Acoustic Insulation of
Square or Rectangular ducts
Description
Rocksilk Duct Slab is manufactured from non-combustible,
inorganic rock mineral wool to give a strong slab of
45kg/m3 nominal density with high thermal efficiency. It
is supplied with a factory applied Bright Class ‘O’ reinforced
aluminium foil facing.
Application
Rocksilk Duct Slab is for the thermal insulation of square and
rectangular ductwork and equipment up to a temperature up to
850°C.
Standards
Rocksilk Duct Slab is made from non-combustible, inorganic rock
wool, defined as mineral wool in BS 3533:1981. It complies with
BS 3958: Part 5 and
with the requirements of BS 5422 and BS 5970. It is manufactured to a
Quality Assurance system which complies with BS EN ISO 9001:2000.
Thermal Performance
The thermal conductivity of the insulation varies with
temperature as shown in the table below.
| Mean Temperature °C |
Thermal conductivity
(W/mK) |
| 10 |
0.033 |
| 25 |
0.035 |
| 50 |
0.038 |
| 75 |
0.044 |
| 100 |
0.049 |
| 125 |
0.055 |
Durability
Rocksilk Duct Slab is odourless, rot proof, non-hygroscopic,
does not sustain vermin and will not encourage the growth of fungi,
mould or bacteria.
Thermal Performance
Rocksilk Duct Slab has a thermal conductivity of 0.033 W/mK at
10°C.
Acoustic Performance
In combination with a suitable cladding, it provides an
excellent basis for noise breakout treatment from ductwork.
Fire Performance
Rocksilk Duct Slab is classified as noncombustible to BS 476:
Part 4: 1970 (1984), Class 1 Surface Spread of Flame to BS 476:
Part 7: 1997 and Class ‘O’ to the Building Regulations.
- Excellent thermal and acoustic properties
- Non-combustible
- Easy to cut, handle and install
Acoustic Performance
Rocksilk Duct Slab can be used for noise control of ductwork.
The lightweight, fire safe and robust nature combined with
excellent sound absorption characteristics make it an ideal choice
for sound attenuation applications.
Operating Temperatures
Rocksilk Duct Slab can be used up to continuous operating
temperatures of 850°C and down to cryogenic temperatures provided
that a 100% vapour barrier is maintained to prevent ingress of
moisture vapour. The surface temperature of the facing should not
exceed 80°C.
Environmental
Rocksilk Duct Slab is free from CFCs, HCFCs and any other
material with ozone depletion potential in its manufacture and
content and represents no known threat to the environment.
Rocksilk Duct Slab’s
manufacture has a low impact on the environment and is classified
as Zero ODP and Zero GWP.
Handling and Storage
Rocksilk Duct Slab is easy to handle and install, being
lightweight and easily cut to size.
Rocksilk Duct Slab is supplied in polythene packs in Supakube
pallets, which are designed for short term protection only.
For longer term protection on site, the product should be stored
either indoors, or under cover and off the ground.
Rocksilk Duct Slab should not be left permanently exposed to the
elements.
Product Data
| Thickness (mm) |
Thermal conductivity
(W/mK) |
Thermal resistance
(m2K/W) |
Slab Size (mm) |
Slabs per Pack |
Area per Pack
(m2) |
| 50 |
0.033 |
1.50 |
1200 x 600 |
10 |
7.20 |
| 40 |
0.033 |
1.20 |
1200 x 600 |
12 |
8.64 |
All dimensions are nominal