C&G Materials

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PowerPointpresentation
Materials
Unit 102: Contribute to setting out and building
masonry structures up to damp proof course

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Example materials and their uses
Clay bricks Used for the external skin of a
house
Engineering brick Used for both appearance and
strength
Lightweight block Used for insulation properties
Dense block A strong, load-bearing block
Building sand Used to lay all bricks and blocks
Spray paint Used to mark lines to the ground
Concrete Used to infill between skins to
provide strength

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Spray paint
Spray paint comes in
tins as shown here.
The spray paint is used
to transfer the ranging
line position to the
ground or concrete.

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Building sand
Building sand can also mark the
ground to show the positions of
the face lines.

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Bricks
Bricks for building below
ground level must be a
strong, engineering brick.
These bricks have
perforations, usually three
as shown below.
Soft clay bricks
such as the brick
above are used
above damp proof
course level.

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Blocks
Internal skins on dwellings
are made from different
blocks.
• Lightweight are used for
insulation properties.
• Dense are used for
strength.

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Concrete
Concrete is used between the
two skins of a cavity wall to
add strength.
This concrete is called fine fill.
It is made from a low strength
concrete, and also stops the
two skins pushing together
when the back fill is applied.

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Cement
Cement comes in
25kg bags. Note that
cement in yellow
bags will contain a
built-in plasticiser.

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Plasticiser
Plasticiser is added to
the water to trap air in
the mix, which in turn
makes the mortar mix
more workable.

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Any questions?