Cavity Wall Insulation is a simple process by which insulation is
injected into this cavity through a carefully designed
pattern of holes. The insulation system is designed so
that any water that does enter the cavity can drain away, whilst
the insulation reduces the heat loss through the
wall.
There are a number of different products, or systems, each of which
must pass stringent technical requirements laid down
by the British Board of Agrement or alternative
independent approvals body. All systems are "fit and
forget" and require no servicing, maintenance or
adjustment.
There are three main
systems in common use, and all are suitable for the
purpose and (except for UF Foam) can be used in all areas
of the UK. CIGA has registered installers, and offers Guarantees
for, all 3 products:
Mineral Wool
Mineral Wool insulation is a cotton wool like material produced from either rock wool or
glass wool, and is used in the majority of
installations.
Polystyrene Bead
Bead is made up of small expanded polystyrene beads normally
injected with a binder.
UF Foam
Urea Formaldehyde cavity wall insulation was introduced
into the UK in the late 1960's and involves the injection of a
water based chemicals system that produces an insulating foam in the
cavity.
