Measuring device for fluid pressures. A digital manometer measures the air pressure relationship between two spaces, providing the magnitude of the pressure difference (if one exists) rather than just the direction.


Heavy-consistency compound that may remain adhesive and pliable with age. Is typically an airtight waterproof compound applied to exterior walls and roof surfaces, or to provide a robust and durable air seal to air duct distribution systems.

Mechanical Ventilation

Controlled, purposeful introduction of outdoor air to the conditioned space.


Full-scale, but limited extent demonstration of a construction assembly, such as a window in a wall, a roof parapet, cladding interface or other construction assembly; prior to mass construction.

Moisture meter

A moisture meter is a device which can check for moisture content in drywall, insulation, wood, concrete and plaster. It can also assist in tracing leaks and finding exterior moisture sources.


A type of fungus that is different from plants, animals and bacteria. Molds are decomposers of dead organic material such as leaves, wood and plants. Molds sometimes can infect living plants and animals. The spores and hair-like bodies of individual mold colonies are too small for us to see without a microscope. When a lot of mold is growing on a surface, it often appears black or green. The color of mold is influenced by the nutrient source and the age of the colony. Mold growing on fabric is called mildew.