Forums DIY House insulation improvements? Reply To: House insulation improvements?
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Yes, I would lay another 300 or 400 mm of glass wool in the opposite direction to the first layer. It will make a big difference. It should be cheap at this time of year if you shop around.

If you’re bothered about the warm air going up past the ceiling lights, change the fittings for bathroom ceiling fttings, which seal better to the ceiling so as to prevent steam from entering the attic.