is turned. Unfortunately, the cracks between the windowpanes don't allow for air infiltration. Home Improvement Glossary keys The wood lath is installed with gaps, called keys, between each piece of lath. The plaster was forced between spaced lath, and this keying action holds the plaster in place. Home Improvement Glossary latchbolt The part of the latch that goes into the edge of the door. Home Improvement Glossary latex glazing putty Latex glazing putty is used for sealing window glass into frames. Home Improvement Glossary lath, laths, lathing Thin strips of wood used as a base for applying plaster. The strips are installed next to each other, separated by gaps. The plaster is forced between spaced lath. Home Improvement Glossary light boxes A light box is a fixture mounted to the ceiling to hold a flat light fixture, usually fluorescent. Home Improvement Glossary linoleum A very durable flooring material made from natural products, such as linseed oil, cork or wood dust, and tree resins. Not to be confused with vinyl sheet flooring. Home Improvement Glossary linseed oil The oil of the flax seed plant, which is used in paint, varnish, lacquer and in the making of linoleum. Home Improvement Glossary liquid asphalt sealer A product that is used to make asphalt more water proof and less porous. Home Improvement Glossary lock cylinder The part of a door look that is attached to the face of the door. Home Improvement Glossary loose fill insulation Loose fill insulation is made out of small