can rust over time. Home Improvement Glossary caulk Caulk is a filler material that seals a crack where two nonmoving components meet, such as where a house's siding meets the exterior window trim. Home Improvement Glossary ceiling box The housing for the electrical wiring that provides power to ceiling light and fan fixtures. Home Improvement Glossary cellulose insulation Cellulose insulation is an organic, loose-fill material made from recycled paper. It has to be chemically treated to resist attack from moisture and pests. Moisture absorption can make cellulose heavier, causing it to become compacted and lose its insulative value. Home Improvement Glossary chimney pots Chimney pots are decorative flues that sit on top of the chimney in older homes and in Tudor or Medieval styled homes. Home Improvement Glossary chintz A glazed floral fabric often used in the English Country style. Home Improvement Glossary chip brush A chip brush is a small paintbrush used to paint in tight spaces. Home Improvement Glossary circuit breakers Protective switches that enable you to fix short circuits without turning off the power Home Improvement Glossary combination primer/sealer A combination primer/sealer seals the surface material and allows the finish paint to have a strong bond. Home Improvement Glossary complementary color scheme A color scheme made up of colors that are at the opposite ends of the color wheel. Home Improvement Glossary compression fittings Compression fittings are used to bond two pipes made of different materials. The fittings also allow the water flow to be turned off