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| URBAN SPACE
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Land availability in an urban area. |
| URBAN SPRAWL
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Unplanned & unexpected expansion of a large area of development in an urban area. |
| UREA FORMALDEHYDE FOAM INSULATION (UFFI)
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A form of insulation no longer in use because of excessive formaldehyde emissions and documented associated health impacts. |
| UREA RESIN GLUE
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Water resistant adhesive sold in powdered form. |
| URETHANE
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An elastomeric polymer with excellent chemical and water resistance. Single component (moisture cure) and 2-part (chemical cure) systems are available. Both types may be applies in a fluid state and cure (polymerize) after installation. Typical tile industry applications include sealants, caulks, waterproofing membranes and high performance flexible adhesives. |
| URETHANE VARNISH
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Durable varnish used frequently on wood floors. |
| URETHANE VARNISH, MOISTURE-CURING
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Oil-free varnish used in damp areas. The varnish cures by reacting to moisture in the air. |
| URINAL
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A plumbing fixture which receives only liquid body waste and conveys the waste through a trap seal into a gravity drainage system. |
| URINAL STRAINERS
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Refers to a domed metal piece fastened to the bottom of an urinal to prevent debris from plugging the trapway of the unit. |
| USABLE STORAGE
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Percentage of hot water that can be drawn from a tank before the temperature drops to a point that it is no longer considered hot. |
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