Loft Insulation and Double Glazing (S.A)
This diagram shows where heat is lost most in a house. Loft insulation and window double glazing can reduce the amount of heat lost. Heat energy is transferred from homes by conduction through the walls, floor, roof and windows. It is also transferred from homes by convection. Heat energy also leaves the house by radiation through the walls, roof and windows.
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Loft insulation is an important method of decreasing the amount of heat lost through your roof. Up to 25% of all heat loss through the home is through the roof due to a lack of loft insulation. The Government guidelines say that loft insulation should now be at least 270mm thick. It reduces the amount of heat lost through conduction and convectionthrough the roof.
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DOUBLE GLAZING!
Heat loss through windows can be reduced using double glazing. The gap between the panes of glass is filled with air. Heat loss through conduction is reduced, as air is a poor conductor of heat. Heat transfer by convectioncurrents is also reduced by making the gap is very narrow.
ADVANTAGES
Heat loss through single glazing will be at least halved with double glazed units. Draughts through windows caused by sinking cooled air will be less with double glazed units .Rooms will be warmer with double glazed units Outside noise can be reduced with double glazed units. Condensation can be reduced with double glazed units.Increases the saleability of the property with double glazed units.Savings on fuel bills with double glazed units.
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LOFT INSULATIONLoft Insulation can take as much as 20% of your energy bill can be saved by havingloft insulation. Loft insulation generally comes in three types; blown material, mineral wool quilt, and loose fill. It can cost as little as £100 to install roof insulation if you do the work yourself and up to about £300 if you get a contractor to do the work. It will save you up to £70 a year if you do it yourself and you will get back your money very quickly, as well as having a much warmer home and reducing Carbon Dioxide emissions. It prevents convection so when the warm air in your house rises, it usually rises out of the roof but when you have loft insulation, the material traps the air and keeps the heat in the house.
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