Flashing: a thin layer of impermeable material (often sheet metal) used in construction to prevent water penetration and provide drainage. Often used between a roof and a wall or over exterior door and window openings.

Fuel Cell

Fuel Cell A clean fuel source that converts chemical energy from hydrogen to electrical energy. Yields zero emissions.

Fresh Air Ventilation

Fresh Air Ventilation A mechanical ventilation component of the HVAC system that draws in fresh air rather than recirculating and filtering air within a home.

Forest Stewardship Council (FSC)

Forest Stewardship Council (FSC) A non-profit organization that encourages the responsible management of the world’s forests. FSC sets high standards that ensure forestry is practiced in an environmentally responsible, socially beneficial, and economically...

Fiber Cement

Fiber Cement A siding that is more durable than wood and is termite resistant, water resistant, non-combustible, and warranted to last 50 years. It is composed of cement, sand, and cellulose fiber that has been autoclaved (cured with pressurized steam) to increase its...