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Topping up exisiting insulation

Discussion in 'Floors, Stairs and Lofts' started by paulheadbaker, 3 Dec 2009.

  1. paulheadbaker


    3 Dec 2009
    Thanks Received:
    United Kingdom
    Hello all,

    I've just bought my first home and as a result, I am venturing into the world of DIY! (Wish me luck).

    In our loft, the joists are annoyingly spaced at app 53cm and are 10 cm deep. Currently, it has some loose fibre insulation in between the joists, not enought to come up flush with the top of the joists, I'd estimate it is only about 4cm deep!!

    Now, I see the thinest Space Blankets I can get are 100m, which would be fine if the joists were clear. But would it be alright to lay this on top of what is exisiting as it means it would rise over the top of the joists?

    Would that make it tricky when I want to lay the 2nd layer at right angles?

    Also - with regards to the 2nd layer - If I want to board a part of the loft, would people recommend I use board insulation for a section of the loft instead of a second roll of space blanket?

    Sorry for the long post - any advice would be welcomed!
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  3. Chukka63


    14 Oct 2009
    Thanks Received:
    United Kingdom
    just lay the new insulation between the joits and then the 2nd layer perpendicular and yes you can use board insulation under the boarded area
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