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UL (Underwriters' Laboratories).
An independent
testing agency that checks electrical devices and other components
for possible safety hazards
ultraviolet degradation.
A reduction in certain performance limits caused by exposure
to ultraviolet light
undercoat. A
coating applied prior to the finishing or top coats of a paint job;
may be the first of two or the second of three coats; a.k.a. prime
coat
underground plumbing.
The plumbing drain and waste lines that are installed beneath
a basement floor
underlayment.
A ¼" material placed over the subfloor plywood sheeting and
under finish coverings, such as vinyl flooring, to provide a smooth,
even surface; also, a secondary roofing layer that is waterproof
or water-resistant, installed on the roof deck and beneath shingles
or other roof-finishing layer
union. A plumbing
fitting that joins pipes end-to-end so they can be dismantled
utility easement.
The area of the earth that has electric, gas, or telephone
lines; may be owned by the homeowner, but the utility company has
the legal right to enter the area as necessary to repair or service
the lines
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