A modification of the construction contract to authorize a change in the work, an adjustment in the amount of the contract or a change in the contract time. The owner, architect and contractor must sign the change. Chattel Personal property such as furniture, clothing or a car. Chattel mortgage A lien on personal property used as collateral for a loan. Chimney back The back wall or lining of a fireplace or furnace chimney.
Chimney flue The passage inside a chimney that channels smoke and heat to the outside.
A short pipe at the top of a chimney that increases ventilation to the fireplace and reduces smoke. A block made of ash and cement that is used in construction. Cinder fill Cinders used below a basement or around a foundation to promote drainage. An electric fuse that activates or deactivates a circuit. Cistern A tank used to store rainwater.