This is due to the capillary action of the bead allowing gravity to draw any moisture present down the inner surface of the outer leaf to drain away at foundation level.
Cavity wall insulation beads or foam.
Many people are now opting for pumping the cavity walls with bonded eps beads after the wall is built rather than relying on the block layer to put the insulation in as he goes.
Cavity wall insulation can give you an annual saving of up to 275.
This process creates holes in your walls that need to be filled patched and painted.
The polystyrene used for cwi is in the form of virgin pre formed bead which is usually combined with a.
Ciga cavity insulation guarantee agency issue an independent 25 year guarantee covering defects in materials and workmanship.
They should all be manufactured to british standards.
New cavity wall insulation polystyrene beads.
Independent research has confirmed that cavity wall insulation is a very reliable process.
If the puffed beads fill the cavity the space can obtain r values close to that of fiberglass insulation.
Problems are therefore extremely rare but if they do occur ciga has the expertise to ensure that they are swiftly rectified.
Cavity wall insulation beads will not allow dampness or moisture to penetrate the cavity in a properly constructed wall.
This also requires that cavities are kept clean but with a 150mm wide clear cavity there is much more space to maintain a clean cavity.
Special 16 width makes it easy to fit between brick ties in cavity wall applications.
We are all familiar with glass wool in the shape of insulation rolls.
Another application in construction for polystyrene beads is retrofit insulation of un insulated exterior walls.
The recommended cavity width is 50mm.
Glass wool rock wool eps beads and foam.
An extruded polystyrene foam insulation board with square edges on all four sides.
To fill a cavity wall one uses 4 types of insulation.
As for cavity insulation glass wool is used in the shape of flakes.
Pur cavity wall insulation.
Injection foam expands to work into difficult areas that blown in insulation may ignore.
Eps expanded polystyrene beads and polyurethane foam are the most commonly used these days and with good reason.
Foam insulation is probably the best retrofit choice in terms of avoiding wall damage.
There is also a 25 year insurance backed guarantee available for pu foam.
Each material has its own price and specific properties.