Mineral wool has a
unique range of properties combining high thermal resistance
with long-term stability. It is made from molten glass, stone or
slag that is spun into a fibre-like structure which creates a
combination of properties that no other insulation material can
match.
Namely the ability to:
The properties derive
from its structure, a mat of fibres which prevent the movement
of air and from its chemical composition. All mineral wool
products exhibit exceptional thermal, fire and acoustic
properties.
Inorganic rock or slag
are the main components (typically 98%) of stone wool. The
remaining 2% organic content is generally a thermosetting resin
binder (an adhesive) and a little oil. Glass wool products
usually contain 95% to 96% inorganic material.
Stone wool is made from
volcanic rock, typically basalt or
dolomite, an increasing proportion of which is recycled
material in the form of briquettes. Slag wool
is made from blast furnace slag (waste).
The briquette can be from recycled material
Glass wool is made from
sand or recycled glass, limestone and soda ash; the same
ingredients as for familiar glass objects such as window panes
or glass bottles. In addition, glass fibre has boron added to
improve its moisture tolerance.
 CE
Marking
The Construction
Products Directive (89/106/EEC) requires products to be 'CE'
marked which shows their conformity with EU standards. The CPD
aims to harmonise the tests, performance declarations and
conformity testing across Member States in order to remove any
barriers to trade through having to comply with differing
national standards.
A CE marked product can
be sold anywhere in the European Economic Area. It should be
noted that it is not a label of quality with, for example
factors such as reliability or durability not taken into
account.
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