Gable – Upper portion of a sidewall that comes to a triangle at the ridge of a sloping roof. Triangular area on an end wall of the building that has sloping roofs.

Gable roof – A type of roof containing sloping planes of the same pitch on each side of the ridge. Contains a gable at each end.

Gable End – The end that has a gable. ‘

Gambrel Roof – Type of roof containing two sloping planes of different pitch on each side of the ridge. The lower plane has a steeper slope than the upper. Contains a gable at each end.

Gauge – A measurement of thickness, used for sizing nails, wire, sheet metal, flashing etc. the lower the number or gauge the thicker or heavier the material.

Geothermal Heating – System similar to a heat pump, except that it uses water from a pond or underground source to provide a heating or cooling instead of outside air.

Girder – A large steel beam-supporting floor joists.

Glaziers Point – In metal triangle used to hold glass into the frame before the putty or glazing compound is applied.

Grade – The level of the grounds surface around the foundation. The surface or slope of finished landscaping or ground.

Grade Line – Level at which the ground or landscaping will be finished around a building.

Granules – Ceramic coated colored crushed rock that is applied to the exposed surface of asphalt roofing products.

Green Board – Special type of sheetrock used in damp or moist locations. Should be used behind bathroom tiles.

Ground – Electrical systems must be grounded to provide a safe service. The ground acts as a safety device in case of a short circuit, it takes electricity out of the system sending it to ground, which is a copper rod hammered into the ground beside your home.

Ground Fault Interrupter – Commonly called a GFI or GFCI. These units are installed on exterior outlets, or in areas where there is a water source (bathroom or kitchen sink) near the outlet. GFI units are designed to protect people from electrocution from hazardous ground faults or short circuits by automatically turning off electricity when a fault is detected. There are two types available; one replaces a standard circuit breaker with a special GFI circuit breaker. The other is a GFI protected outlet that takes the place of a regular outlet, when installed this outlet will also protect all the outlets down line of it on the circuit

Grounded Outlets – These outlets are distinguishable by their three-hole pattern, on this type of outlet the ground hole is wired to the ground system in the home.