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There is loft insulation to keep in all the warm air from the heater
It Stops Convection - heat rises you stop it going up with the loft insulation and therefore the heat stays in for longer
Loft insulation and double glazing.
dependes what type of loft insulation you have
It's used to insulate your loft.
the loft insulation is bad in that house
Generally, the heat in your house rises. This can mean that a lot of heat is lost through the roof. If you put insulation in your loft, the insulation is a poor conductor of heat so the heat stays below the loft and your loft is cold. Then less heat gets to the roof and so less heat is lost.
With no loft insulation you would lose a lot of heat through your loft and be colder, and spend a lot more money on fuel to keep warm in winter.
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The thicker the loft insulation the less heat escapes The thicker the loft insulation, the more trapped air there is which helps to keep heat in as air is a good insulator.
conduction
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