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DADO RAIL |
| Wooden moulding fixed horizontally to a wall, about 1 metre (3ft 4in) above the floor, originally intended to protect the wall against damage by chair-backs. | |
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DAMP-PROOF COURSE |
| Course Layer of impervious material (mineral felt, pvc etc.) incorporated into a wall to prevent dampness rising up the wall or lateral dampness around windows, doors etc.. Various proprietary methods are available for damp-proofing existing walls including "electro-osmosis" and chemical injection. | |
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DEATHWATCH BEETLE |
| (Xestobium Refovillosum.) Serious insect pest in structural timbers, usually affects old hardwoods with fungal decay already present. | |
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DOUBLE GLAZING |
| A method of thermal insulation usually either: Sealed unit : Two panes of glass fixed and hermetically sealed together; or Secondary : In effect a second "window" placed inside the original window. |
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DRY ROT |
| (Serpula Lacrymans.) A fungus which attacks structural and joinery timbers, often with devastating results. Can flourish in moist, unventilated areas. | |
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EAVES |
| The overhanging edge of a roof. | |
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EFFLORESCENCE |
| Salts crystallized on the surface of a wall as a result of moisture evaporation. | |
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ENGINEERING BRICK |
| Particularly strong and dense type of brick, sometimes used as a damp-proof course. | |
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