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Unfibered Gypsum

A neat gypsum. It has no additives.

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Underground plumbing

The plumbing drain and waste lines that are installed beneath a basement floor.

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Underlayment

Sheet material, such as hardboard, that is laid over the subfloor to provide a smooth, stiff surface for the finish flooring.

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Undercoat

A coating applied prior to the finishing or top coats of a paint job. It may be the first of two or the second of three coats. Sometimes called the Prime coat.

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Underlayment-

A Â¼" 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.

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Union

A plumbing fitting that joins pipes end-to-end so they can be dismantled.

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Under-Carpet Wiring

A flat, insulated electric wire that is run under the carpet.

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Unreinforced Concrete

Concrete placed without steel-reinforcing bars or welded-wire fabric.

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Uniform Load

Any load that is spread out evenly over a large area.

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Underpinning

Placing a new foundation below the existing foundation.

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Vapor barrier

A building product installed on exterior walls and ceilings under the drywall and on the warm side of the insulation. It is used to retard the movement of water vapor into walls and prevent condensation within them. Normally, polyethylene plastic sheeting is used.

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Valley flashing

Sheet metal that lays in the "V" area of a roof valley.

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Urea Formaldehyde (Formaldehyde (Added))

Formaldehyde is classified by the International Agency for Research on Cancer and the State of California as a known human carcinogen. Common health effects at low levels of exposure to this volatile organic compound include irritation and sensitization as well as acting as an asthma trigger. Long-term exposure is associated with nasal cancers and leukemia. https://healthymaterialslab.org/tool-guides/hml-resources

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Valuation fee

- The fee paid by the prospective borrower for the lender's inspection of the property. Normally paid upon loan application.

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Valence

The points on an atom to which valences of other elements can bond.

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Valley

The "V" shaped area of a roof where two sloping roofs meet. Water drains off the roof at the valleys. The intersection of two inclined surfaces.

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Valuation

An inspection carried out for the benefit of the mortgage lender to ascertain if a property is a good security for a loan.

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Upcycling

Materials are applied with respect for their intrinsic value and their useful afterlife in recycled or even "upcycled" products, which have value and technological sophistication that may be higher than that of their original use. Upcycling is any measure and activity in the design phase targeting at optimal handling of products as nutrients https://healthymaterialslab.org/tool-guides/hml-resources

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USASI

United States of America Standards Institute, now American National Standards Institute.

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Utility easement

The area of the earth that has electric, gas, or telephone lines. These areas 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.