Gable
The triangle of brickwork that forms the roof, usually found on the end of a house.
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Gable Board
A timber board following the lines of the apex on the gable-end covering the ends of roof timbers, protecting them from rain. Also known as Barge Boards or Verge Boards.
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Galvanized
Covered with a protective coating of zinc.
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Gauged Brickwork
Brickwork with 10mm joints.
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Glazing Bar
Thin bar shaped to receive a pane of glass.
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Going
The depth of the treads on a staircase.
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Grain
The general direction of wood fibres; the pattern produced on the surface of timber by cutting through the fibres. (See also End Grain and Short Grain).
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Gravity Fed System
Central heating system that circulates water by gravity and water expansion.
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Grommet
A rubber or plastic ring, which lines a hole to protect electrical cable from damage.
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Groove
A long narrow channel cut into a material.
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Ground Heave
Swelling of clay sub-soil due to absorption of too much moisture - this can cause an upward movement in foundations.
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Grounds
Strips of wood fixed to a wall to provide nail-fixing points for skirting boards, door casings etc. (See also Pallets).
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GRP
Glass Reinforcement Plastic - a type of fibreglass used in the making of some garage doors
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Gully
An opening into a drain, normally at ground level, placed to receive water etc. from downpipes and wastepipes.
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