Cavity Wall Insulation

Engineer installing cavity wall insulation

InstaFibre cavity wall insulation is available in four types as described below. An exclusive patented blown installation process developed by InstaGroup and approved by the BBA is used to install the three mineral wool systems.

The InstaBead system is installed using a compressed air system which delivers the beads, together with adhesive, under pressure into the cavity.

InstaFibre Yellow Wool

InstaFibre Yellow Wool PDF download

Manufactured from recycled insulation material (granulated glass wool fibres manufactured from silica sand and treated with an inert water repellent), Yellow Wool provides an alternative to InstaFibre White Wool described above.

 

 

InstaFibre White Wool

InstaFibre White Wool PDF download

This insulation comprises granulated glass wool fibres manufactured from silica sand and treated with an inert water repellent during manufacture. It is a new generation product developed specifically for use in cavity walls.

 

 

InstaFibre Rockwool

InstaFibre Rockwool PDF download

Manufactured from Basalt volcanic rock, this type of insulation comprises granular rock wool fibres treated with inert water repellent during manufacture. Its loose fibres are easily blown into the recesses of the cavity. It is a well-established product offering excellent thermal resistance.

 

InstaBead Cavity Wall Insulation

InstaFibre Bead PDF download

This system consists of an expanded polystyrene bead material injected into the cavity where it is bonded with adhesive. It is the latest addition to the InstaFibre range.

Technical Information

Without InstaFibre installed, heat is lost through the empty cavity in your external walls. With InstaFibre installed, heat is radiated back into your home.

More heat is lost through the walls of our homes than in any other way. A staggering 35% of our domestic heat is wasted across un-insulated cavity walls, which means that we are consuming energy far in excess of our needs.

New Building Regulations introduced by the Government require an increase in the amount of insulation fitted in all new homes to make heating more efficient, more economical to run and to help conserve the world's natural resources. Soon we will all be expected to save energy by insulating our homes to a required standard.

InstaFibre is a blown mineral wool, which, once installed in the cavity wall, forms an insulative barrier, which retains the heat inside your home. It works by storing the heat in the inner wall and radiating it back into the home - with the effect that you can turn down your heating without losing out on comfort. It also maintains a constant temperature throughout the home. One of the benefits of this is to eliminate condensation. Draughts are also reduced as InstaFibre seals off the gap around badly fitting door and window frames. InstaFibre makes your home warmer and cheaper to run by cutting the cost of your heating.

To ensure a total fill of the cavity, the material is blown through a predetermined drilling pattern of small holes that are made good with matching mortar after installation.

For many years, InstaFibre has been used extensively by the building and construction industry. Our material is widely used to insulate factories, offices, schools and and is specified by Housing Associations all over the country.

InstaFibre cavity wall insulation is available only through our network of fully trained specialists. Using our patented InstaFibre system, which has been approved and certified by the British Board of Agrément (BBA), the body responsible for testing standards for building products, you can be assured that you are getting the best materials that money can buy.

The fact that so many house builders, local authorities and construction companies use InstaFibre across the UK is testimony to the proven effectiveness of the InstaFibre system. As quoted in the Agrément Certificate for the material, "No failure of InstaFibre has been reported to the British Board of Agrément". This unparalleled performance means that you can have total confidence in the InstaFibre cavity wall insulation system.

Checklist for effective Cavity Wall Insulation

  1. Produced by the world's largest insulation manufacturer
  2. Fully approved by the British Board of Agrément (BBA)
  3. Non-combustible when tested to BS 476 Part 4 1970
  4. Allows the walls to breathe
  5. Will remain effective for the life of the building
  6. Will not transmit the passage of water
  7. Will not sustain mould growth or rodents
  8. No added chemicals or water
  9. No adverse effect upon wood, brick, wall ties or unsheathed PVC cables
  10. Will not settle or shrink
  11. Will not escape from the wall
  12. May be installed anywhere in the UK
  13. Installation by fully trained insulation specialists
  14. Manufactured from the Earth's natural products
  15. Ozone friendly - no CFCs or chemical vapours
  16. No failure of InstaFibre ever reported to the BBA

Density

The target mean density of the three types is as follows:

InstaFibre Rockwool 40 kg/m3
InstaFibre Yellow Wool 20 kg/m3
InstaFibre White Wool 18 kg/m3
InstaBead 12 kg/m3

Thermal Conductivity

For the purpose of U-value calculations, the thermal conductivity may be taken as:

InstaFibre Rockwool 0.039 Wm-1K-1
InstaFibre Yellow Wool 0.039 Wm-1K-1
InstaFibre White Wool 0.040 Wm-1K-1
InstaBead 0.040 Wm-1K-1

Cavity wall insulation is an accepted means of improving the thermal resistance of walls built using the cavity wall form of construction. All Four InstaFibre systems are suitable for all types of building with masonry cavity walls, up to and including 12m in height.

All four InstaFibre systems are certificated by the British Board of Agrément: Rockwool is covered by Certificate No 95/3149, White Wool by Certificate No 89/2294, Yellow Wool by Certificate No 88/1976 and InstaBead by Certificate No 04/4155. The company has a quality assurance scheme complying with ISO 9001 (Certificate No: GB05/64742) and ISO 14001 (Certificate No: GB07/72624).