InstaFibre Yellow Wool

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. We supply and install InstaFibre Cavity wall insulation in Dublin and Monaghan.

InstaFibre White Wool

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 Cavity wall insulation.

InstaFibre Wool versus Polystyrene Beads

When installed correctly, InstaFibre wool is certified, by the National Standards Association of Ireland (NSAI), not to settle or shrink in a wall. It’s installed at a target mean density of 20 Kg/m3 to a pre-determined drilling pattern as outlined by the NSAI, BBA and InstaFibre.

The NSAI and InstaFibre regularly check to see if the correct amount of InstaFibre is used per job. To facilitate this we record a 7 digit serial number, which is printed on each 16.6kg bag of InstaFibre wool. The number of bags required for each job can be determined by examining the cavity width and net wall area.

Polystyrene beads cannot be installed in a cavity wall which has existing electrical cables that are not in a conduit. In our experience, in more than 50% of cases of existing housing stock, the main ESB cable is not in a conduit. Unlike beads, InstaFibre wool has no issue with being installed around unprotected cales. Polystyrene beads, can affect electrical cables in two ways…

1. They can cause the electrical cable to melt. This is a fire hazard and can give off a toxic smoke.

2. Polystyrene can interact with the chemical composition of cables. This will reduce the flexibility of the cable, which can then become rigid and break in the cavity.

InstaFibre wool is installed directly into the wall cavity, from factory packed bags, via the insulation blowing machine. There is no possibility of the errors associated with mixing glue into the insulation.