1.
Is Rockwool fire safe?
All unfaced, aluminium foil faced and glass tissue faced Rockwool products
produced in the UK are noncombustible and will achieve a reaction to fire
classification of A1.
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2. Can Fire Barrier be used as fire Protection for structural
steel?
Yes, depending of the Hp/A ratio Fire barrier can be used for up
to 2 hours fire protection.
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3. What about fire protection of structural steel beams
and columns?
Firepro Beam Clad can provide up to 4 hours fire protection to steel
beams and columns. If appearance is important, the Firepro Beam Clad
board system can be installed to provide boxed or profiled protection
for 2,3, or 4 sided, exposed steel conditions.
Available with scrim, foil or plain facing it can be glued or pin-fixed
into position to provide a neat finish, which, if required, can be
decorated. Firepro Beam Clad boards are easy to cut to required shapes
on site, allowing service penetrations to be neatly accommodated.
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4.
Which product would you recommend for fire resisting division
of
roof spaces to comply with fire regulations?
Rockwool Fire Barrier is the ideal system. Made of non-combustible
rock stitched to a wire mesh, the barrier can be installed
(using Rockwool angle supports and clamping plate) as a curtain
of
Rockwool. It will inhibit the spread of smoke and flames through
concealed spaces. Flexible and easy to handle it will provide
up to 2 hours fire resistance. Extended drops are feasible
in large voids and the system allows for penetration by building
services. Rockwool Fire Barrier also has a useful acoustic
attenuation effect, reducing the level
of transmitted from room to room.
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7.
If I fully fill my masonry cavity wall with Rockwool Cavity , will
I require additional
fire stopping at the party wall junction?
No – in the opinion of the British Board of Agrément,
Rockwool Cavity will satisfy the following requirements of the 2000
Building Regulations:
B3 (4): Resistance to fire spread between and within cavities.
Rockwool Cavity is non-combustible and therefore may be used in
buildings of every purpose group. They may also be considered as
a cavity barrier when tightly fitted between masonry leaves where
an insulated wall connects with the cavity of a wall without cavity
insulation.
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8. How
can I achieve the compartmentation requirements in an empty or partially
filled external masonry cavity wall, at the party wall junction?
Rockwool Acoustic Party Wall dpc, which comprises of Rockwool insulation
bonded to a wide dpc, is friction fitted into the external cavity
across the party wall junction. The dpc face is located against
the external leaf. This solution not only provides the 60-minute
fire resistance requirements of Building Regulations Approved Document
B, but will also meets the acoustic requirements of Approved Document
E.
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9.
Can I use other fixings than Rockwool Angles and Straps to fix
the Fire Barrier System?
Obviously, our primary objective is to ensure that the fixing angle
and strap that Rockwool has had tested and certificated is used
in conjunction with our Fire Barrier although, we would accept
that non-Rockwool supplied angles and straps may well be used as
an alternative.
In such instances we would advise that the specifier, supplier,
or installer satisfy them selves totally, via reference to the
fixing manufacturer, that the chosen fixing has
been tested and approved for the required amount of fire resistance.
As we are sure you will appreciate, Rockwool could not possible
underwrite a product that it has not supplied.
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10. How can
the gaps between the head of a block work wall and a tiled or slated
pitched roof be sealed to prevent fire spread to the adjacent property?
There are two paths which require sealing to maintain the fire
compartmentation at this junction – between the masonry wall
and the underside of the roofing felt and within the timber batten
void, between the felt and the tiles/slates. 300mm wide strips
of 30mm thick Rockwool RWA45 can be used in both instances. Provided
the masonry wall width is at least 250mm
and the insulation is inserted under at least 10% compression, the
60-minute requirement of Building Regulations will be met.
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11.
When installing recessed lighting within a ceiling are there
any precautions required
if there is already insulation between the joists.
When installing down lighters within a ceiling you should have
acoustic/fire covers, or maintain a void over the top of them.
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