Heavy Duty Aluminium White Brush Around Door Seal Draught excluder Weather proofing by Stormguard. Size 4 ×1028 mm and 1 x 914 mm, Enough for one Single Door Opening

Your house or commercial property will loose heat during cold weather partly due to poor thermal insulation, but also due to the air-leakiness of the building. This warm air loss is technically known as infiltration or permeability and is measured in metres cubed per hour per square metre of floor area. A typical building built 1900 to 1990 will loose around 20-30 metres cubed of air per hour p...