CUTTING & FIXINGS
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Whilst having an excellent compressive strength - more than strong enough for most building
purposes - the microcellular composition of aircrete makes it extremely easy to work with. It
can be sawn, chiselled, drilled and chased using ordinary hand tools - saving time as well as
being highly convenient.
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Easy to cut and work with
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Aircrete products have exceptionally good workability and are easy to cut, shape and
chase using ordinary woodworking tools. This makes them ideal for closing the cavity at
reveals and for cutting around and over joists, or for special shapes such as infills.
Blocks are easily cut using hammer and bolster or wood saw.
A straight cut ensures less wastage and reduces the need to make good.
Hammer and wood chisels can be used for chasing-out.
Use woodworking drill bits to accommodate wall plugs before fixing screws.
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Reliable and strong fixings
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Aircrete is an excellent substrate for strong, reliable fixtures and fittings
when hanging even moderately heavy items such as radiators and wall cupboards.
Careful installation is the key to ensuring strong, secure and reliable fixing.
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Fixing with cut nails
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Proprietary cut nails can be driven, askew, directly into Aircrete for fixing
skirting boards, timber battens or lightweight door linings. Insert nails
immediately above and below door hinge positions.
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Correct drilling procedure
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Use a steel, not a masonry, bit of smaller diameter than the plug and at the
slowest possible speed.
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Screws with plugs
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For light duty fixings, use proprietary nylon or plastic plugs. For a
stronger, medium-weight fixing, use tapered plastic plugs, tapped into a
parallel-sided hole. For heavier weights use plastic plugs with teeth on
the sides which key into Aircrete ensuring high pull-out resistance.
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Special Aircrete fixings
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Many specialised fixings have been developed for Aircrete, and their use
wherever possible is recommended by the APA. These include:
- Special fixings for door frames.
- Plastic spiral screw-fixing plugs which cut their own thread into
pre-drilled holes.
- Special hollow-centre plugs which are grouted into Aircrete for
heavy-duty fixing of boilers for example.
- Spiral or helical stainless steel nails which provide an excellent
hammer-in fixing for securing timber to Aircrete.
- Sleeved nails which expand into the blockwork after being driven in
to a certain depth, ensuring an excellent fixing, even if loosened.
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