A masonry wall made up of two wythes of masonry units separated by an air space.

(1) A flexible material used to seal a gap between two surfaces e.g. between pieces of siding or the corners in tub walls. (2) To fill a joint with mastic or asphalt plastic cement to prevent leaks. A resilient material used to seal cracks and prevent leakage of water.

One of a series of parallel framing members used to support ceiling loads and supported in turn by larger beams, girders or bearing walls. Also called roof joists.

Vacuum tube, made primarily of glass, which constitutes the video display component of televisions and computer monitors. These tubes are generally hazardous for lead. https://healthymaterialslab.org/tool-guides/hml-resources

CDPH Standard Method is the "Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers” published by the California Department of Public Health (CDPH). https://healthymaterialslab.org/tool-guides/hml-resources

A pesticide that is forced into wood under high pressure to protect it from termites, other wood boring insects, and decay caused by fungus

Concrete piles cast in a hollow metal shell driven into the earth or an uncased hole.

A drainage device used to collect water, with a deep pit to catch sediment.

Black fibrous board that is used as exterior sheathing.

A metal part produced by pouring a molten metal into a mold.

A rating that expresses the amount of air a blower or fan can move. The volume of air (measured in cubic feet) that can pass through an opening in one minute.

A fire-resistant vertical shaft through a multistory building used to route electrical, mechanical, and transportation systems.

A compound of metallic oxides, chemicals, and clays fused to a material at high temperature, providing a hard, smooth surface.

Materials that have cementing properties.

A man-made or machine-made clay tile used to finish a floor or wall. Generally used in bathtub and shower enclosures and on counter tops.

A class of products made of clay fired at high temperatures.

A factory-manufactured panel, 1/4" to 3/4" thick, 32" to 48" wide, and 3' to 10' long, made from aggregated and reinforced portland cement.

The gray powder that is the "glue" in concrete. Portland cement. Also, any adhesive. A material that is able to unite nonadhesive materials into a solid mass.

The point in a cross-section where all of the area may be considered concentrated without affecting the moment of the area about any axis.

Mortar made with the addition of slaked lime to the cement.