Frequently Asked Questions |
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What is Class 1 |
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Class 1 is a classification as defined by
BS 476 Pt 7 – Surface spread of Flame. The test measures
the distance of flame spread across a surface. Results
ranging from the worst, Class 4 –i.e. longest distance
of flame spread to the Best, Class 1 –i.e. least
distance of flame spread. |
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What is Class O |
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Class O is not a fire test but in fact a
classification from The Building Regulations 1991 – Fire
Safety, Approved Document B.
In order for a system to achieve a Class O rating it must meet the following
requirements: 2.1 Achieve a Class 1 fire rating from BS476 Pt7 – Surface
spread of Flame.& 2.2 Achieve an Index of I= less than 12 & i1= less
than 6.from BS476 Pt 6 – Fire Propagation. |
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Can I upgrade my softwood door to
30 minutes fire resistance using a clear intumescent
varnish. |
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There are no clear "intumescent varnish" type
coatings that will provide 30 minutes fire resistance to
timber floors. The best people to advise you are Chiltern
Fire, Tel: 01494 569800. They are the specialists in upgrading
timber doors. |
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How much paint do I need to protect
my steel work for 60 Minutes Fire resistance. |
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The amount of paint required to protect
your steel will depend of several factors. Please refer
to our section on Hp/A. This will explain the methodology
of heat sink and how we calculate film thicknesses and
quantities. |
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Can I use a normal paint on top
of your Intumescent paint. |
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In order to maintain the fire rating that
the Intumescent has provided you will be required to use
one of our flame retardant top seals. If you use a conventional
paint it may well down grade the fire rating of the system. |
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My walls have had several coats
of conventional paints over the last few years. Do I
have to remove these before treating the surface with
a flame retardant product. |
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Providing the paint layers are firmly adhered
to the substrate you will be able to over coat the wall
with our Intumescent coating to achieve a fire rating.
If the paints are in poor condition then they must be removed
back to the substrate. If the bare wall is noncombustible,
i.e. Plaster / Plasterboard then you can use our Flame
retardant paint systems to achieve a Class 1 or O rating.
Do not use conventional paints as they may contribute to
the spreading of fire. |
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What is airless spray. |
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Airless spray is a method of application
which involves the use of a variety of different types
of equipment i.e. Electrically, Petrol or air compressor
driven. They work by forcing the material at high velocity
and high pressures through a fine spray tip. This type
of application is a highly economically way of applying
fire protection products quickly and efficiently.
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How do I know how much Brosteel
I am applying to the steelwork. |
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With every can of Brosteel you will be supplied
with a wet film thickness gauge. This can be used to measure
the amount of paint that you are applying to the surface.
Follow the guidance notes on the gauge to use correctly.
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Can I obtain some sort of certification
to verify that the paint has been applied. |
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Bollom fire protection will supply a certificate
of supply when the project has been completed, providing
certain information has been supplied. Contact our technical
support staff to discuss this matter further. |
