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U
Undercoat
Layer or layers of paint used to cover previous paint colours or wallpaper patterns or to cover the initial colour of a surface.
Undercutting
Cutting away material from the edges of a recess to provide a key for new material.
Underpinning
A method of strengthening weak foundations by supporting the walls, digging underneath and inserting a new foundation
Unique Property Reference Number
See UPRN
Unplasticised Poly Vinyl Chloride
See UPVC
UPRN (Unique Property Reference Number)
Each building in the UK is given a UPRN by the Government which is unique to that property
UPVC (Unplasticised Poly Vinyl Chloride)
Durable and versatile plastic commonly used in windows, doors, guttering and fascias