Information provided by www.ukhomeinsulation.co.uk
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Method of Work
A cavity insulation Surveyor will inspect the properties to assess their suitability
to receive insulation. The major points to be considered are:- Major cracks
in the external walls. Defective pointing. Badly cracked or missing render.
Signs of frost damage Any other defects that may lead to water penetration.
If defects exist a summary of remedial work necessary to make the property suitable
for insulating will be produced.
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Preparatory Work
After arrival on site, the Cavity wall Insulation Operative should check that:-
All loose fittings (Ornaments, picture frames, ect.) have been removed from
the external walls (provided access can be obtained). All doors and windows
are in the closed position. The following work should be carried out where necessary
to prevent the escape of material. Cavity brushes are fitted as required. Air
bricks, if not adequately sleeved, should be lined to prevent blockage and to
allow free flow of air.
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Preparatory Work
The blowing holes in the wall are approximately 25mm in diameter and are drilled
at the intersection of the horizontal and vertical mortar joins so as to minimise
damage to the brickwork (unless through rendered areas). Before starting the
blowing process on any elevation, ALL holes must be drilled in that elevation.
This is to ensure that no debris can fall onto the insulation material in the
adjacent cavity and hence from a bridge between the inner and outer leaves.
The drilling pattern is planned to include details such as openings, chimneys,
flues and vents in accordance with the British Board of Agrément Certificate
No 99/3637.
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Making Good
Mortar is mixed to match existing colour. Blow holes are repointed. Any loose
material is swept up. The making good process can be carried out immediately
after each blowing hole has been filled. This has been found to be the most
effective method.
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Plant and Equipment
The following plant and equipment will be used on the project. Ladders. Ladder
spreader bars (as required). 110v drills. Generators.Blowing Machine. Harnesses
and Lanyards (as required). Under no circumstance is defective equipment to
be used.
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First Aid
Although the materials used are relatively low risk, all operatives should
be fully aware of emergency procedures.
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Personal Protective Equipment
Suitable personal protective equipment is provided to all operatives. Operatives
should wear safety helmets on all sites, the only exception being :- For operatives
working inside dwellings where there is no risk from falling objects. When inside
site offices, canteens and sanitary conveniences. Safety footwear should be
worn at all times. Ear protection should be worn whilst drilling or working
in close proximity to generators. Gloves should be worn while handling insulation
fibre and cement products. B.S.6016 Type 1 disposable face masks or other suitable
HSE approved masks should be worn while handling insulation fibres, cement or
while drilling mortar Eye protection should be worn whilst longer than 5m. The
ladder should ideally be placed at about 75 degrees to the horizontal, i.e.
1m out from the building for every 4m in height. Ladders should be rested against
a solid surface. It should not be placed against plastic against gutters or
other such surfaces.
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Blowing Procedure.
The material is injected through a directional nozzle. Filling proceeds from
the bottom to the top of the walls and from one end of the elevation to the
other. As the blowing proceeds a record of the number of bags used is kept to
confirm the installed density. If any hole excessive period a check should be
made to ensure the material is not being blown into the floor spaces, lofts,
ect.
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Final Check
Flues are checked to ensure they are clear (by a suitably trained gas engineer
where required). Airbricks are checked to ensure they are clear. The amount
of material used is recorded to ensure that a correct fill has been obtained.
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Remedial Works
Remedial works will be carried out by trained operatives using the appropriate
methods and equipment.
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Visit www.ukhhomeinsulation.co.uk to get professionally installed, guaranteed loft insulation. You may be eligible for a grant and with that, it may cost less than DIY insulation.