Cavity Barriers
For use in firestopping and noise reduction applications in
cavity walls
Description
Knauf Insulation Cavity Barriers are manufactured from a
continuous length of non-combustible glass mineral wool which is
compressed within a resilient polythene sleeve incorporating two
flanges designed for ease of fixing.
This polythene sleeve is colour-coded to suit a variety of
cavity widths from 50mm to 100mm and eliminates the need for
weather protection during installation.
The barriers are 1200mm long and can be used in both vertical
and horizontal applications, and are available in two standard
depths (100mm and 300mm).
100mm barriers are used for normal fire stopping and noise
reduction applications. 300mm barriers are used where higher
performance levels are specified and at party wall / external wall
cavity junctions.
Application
Knauf Insulation Cavity Barriers are engineered to prevent the
spread of smoke and fire through walls, floors and cavities in
timber frame, metal frame and masonry buildings.
They are also suitable for reducing flanking noise transmission
in these concealed cavities.
The use of the correct size of Cavity Barrier is essential.
Knauf Insulation Cavity Barriers are designed to compress to a
tight fit in cavities and in the event of fire breaking into the
cavity, Cavity Barriers do not rely on the polythene flanges to
hold them in place, but on their compression between the inner leaf
and external brickwork or blockwork.
It is, therefore, essential to specify the Cavity Barrier by
reference to the actual constructed cavity width. In vertical
applications, both flanges of the Cavity Barrier should be fixed to
the inner leaf.
Fire Performance
The mineral wool in Knauf Insulation Cavity Barriers is
classified as Euroclass A1 to BS EN ISO 13501-1.
Acoustic Performance
Knauf Insulation Cavity Barriers meet the generic description
for cavity closers and will therefore ensure compliance with Part E
and Robust Details in timber frame and masonry constructions.
- Meets Building Regulation requirements for both fire and
acoustics
- Simple to install and fix due to flanges on all
thicknesses
- Easy identification by colour coded polythene for stockist and
contractor
- Dimensionally stable and robust
In horizontal applications the top flange of the polythene
sleeve should be fixed to the inner leaf.
All joints and intersections of Knauf Insulation Cavity Barriers
should be closely butted.
Standards
Knauf Insulation Cavity Barriers are noncombustible, inorganic
glass wool, defined as Mineral Wool in BS 3533: 1981 and are
manufactured in accordance with BSI Quality Assurance Standard BS
EN ISO 9001: 2000.
Durability
Knauf Insulation Cavity Barriers are odourless, rotproof,
non-hygroscopic, do not sustain vermin and will not encourage the
growth of fungi, mould or bacteria.
Environmental
| ECOSE® Technology |
Knauf Insulation mineral wool products with ECOSE® Technology benefit from a natural, formaldehyde-free binder made from rapidly renewable organic materials, instead of petroleum-based chemicals, which is up to 70% less energy intensive.
The technology has been developed for Knauf Insulation’s glass and rock mineral wool products, enhancing their environmental credentials without affecting the thermal, acoustic or fire performance. Insulation products made with ECOSE® Technology contain no dye or artificial colours – the colour is completely natural.
|
Knauf Insulation Cavity Barriers are free from CFC’s, HCFC’s and
any other material with ozone depletion potential in its
manufacture and content and represents no known threat to the
environment. Glass mineral wool is an environmentally friendly
insulation material with a high percentage of the raw materials
used in the process coming from recycled sources. Knauf Insulation
glass mineral wool’s manufacture has a low impact on the
environment and is classified as Zero ODP and Zero GWP.
Fire Performance
Knauf Insulation Cavity Barriers are manufactured from glass
mineral wool which has a Euroclass A1 fire rating when classified
in accordance with BS EN 13501-1. Knauf Insulation Cavity Barriers
have been tested for fire resistance in accordance with BS 476:
Part 8: 1972 and will provide 60 minutes stability, integrity and
insulation. This is covered by the Warrington Fire Report
No.151215.
Acoustic Performance
Building Regulations require the use of a cavity closer to
reduce flanking noise transmission along party wall cavities and
external wall cavities in masonry and timber frame constructions.
Knauf Insulation Cavity Barriers meet the generic description for
cavity closers and will therefore ensure compliance with Part E and
Robust Details in timber frame and masonry constructions.
Handling and Storage
Knauf Insulation Cavity Barriers are easy to handle and install,
being lightweight and easily cut to size. They are supplied in
polythene packs which are designed for short term protection only.
For longer term protection on site, the product should either be
stored indoors, or under cover and off the ground.
Product Data
| Thickness (mm) |
Length (mm) |
Depth (mm) |
Barriers per Pack |
Sleeve Colour |
| 50 - 65 |
1200 |
100 |
50 |
yellow |
| 50 - 65 |
1200 |
300 |
13 |
yellow |
| 66 - 80 |
1200 |
100 |
40 |
blue |
| 66 - 80 |
1200 |
300 |
10 |
blue |
| 81 - 100 |
1200 |
100 |
40 |
white |
| 81 - 100 |
1200 |
300 |
10 |
white |
All dimensions are nominal