200+ building and trade terms defined in plain English - from foundations to finishes, planning to Party Walls.
200+ terms across 16 trade categories
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A horizontal barrier built into a wall to prevent ground moisture rising by capillary action. Required by Building Regulations in all new walls.
Read definition StructuralA structural steel beam used to carry loads over openings such as knocked-through walls, garage conversions and loft hatches. Also called an I-beam or universal beam.
Read definition PlanningA simplified route for obtaining building regulations approval without submitting full plans. An inspector visits at key stages to check compliance. Suitable for straightforward domestic work.
Read definition PlanningRights that allow certain types of work to be carried out without needing to apply for full planning permission, subject to size, location and design limits set by the GPDO.
Read definition CarpentryA short horizontal timber fitted between studs in a stud wall to provide lateral bracing and a fixing point for shelves, radiators, sanitaryware and other wall-mounted items.
Read definition StructuralA horizontal structural member spanning an opening in a wall - above a door, window or archway - transferring the load from above to the masonry or structure on each side.
Read definition ThermalA measure of how quickly heat passes through a building element. The lower the U-value, the better the insulation. Part L of the Building Regulations sets maximum U-values for walls, roofs and floors.
Read definition MasonryThe mortar finish applied to the exposed joints between bricks or stones. Repointing replaces old, weathered mortar to restore weathertightness and appearance.
Read definition DrainageAn underground pit filled with rubble or crates that allows surface water or roof runoff to drain slowly into the surrounding ground. Required for sustainable drainage (SuDS) on new driveways.
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Find out whether your project needs full planning permission or qualifies as Permitted Development - with clear rules for England.
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