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Home/Glossary/U

Glossary

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U

Undercoat

The foundation coats applied before the topcoat.

Underlay

A flat roof covered with roofing felt will normally have three layers of felt. The first two layers are called the underlay.

Underpinning

Strengthening existing building foundations, to remedy a problem with subsidence.

UPVC

UPVC (unplasticised polyvinyl chloride) is a rigid plastic material widely used in the construction industry in the form of pipes, guttering, window and doorframes, fascias and soffits.