A - B | C | D - E | F - H | I - O | P - R | S | T - Z

Inspection chamber

Commonly called "man-hole". Access point to a drain comprising a chamber (of brick, concrete or plastic) with the drainage channel at its base and a removable cover at ground level.

Jamb

Side part of a doorway or window.

Joist

Horizontal structural timber used in flat roof, ceiling and floor construction. Occasionally also metal.

Landslip

Downhill movement of unstable earth, clay, rock etc. often following prolonged heavy rain or coastal erosion, but sometimes due entirely to sub-soil having little cohesive integrity.

Lath

Thin strip of wood used in the fixing of roof tiles or slates, or as a backing to plaster.

Lintel

Horizontal structural beam of timber, stone, steel or concrete placed over window or door openings.

Longhorn beetle

(Hylotrupe Bajulus.) A serious insect pest mainly confined to the extreme south-east of England, which can totally destroy the structural strength of wood.

LPG

Liquid Petroleum Gas or Propane. Available to serve gas appliances in areas without mains gas. Requires a storage tank.

Mortar

Mixture of sand, cement, lime and water, used to join stones or bricks.

Mullion

Vertical bar dividing individual lights in a window.

Newwl

Stout post supporting a staircase handrail at top and bottom. Also, the central pillar of a winding or spiral staircase.

Oversite

Rough concrete below timber ground floors: the level of the oversite should be above external ground level.

A - B | C | D - E | F - H | I - O | P - R | S | T - Z