loft insulation Information, help, tips and advice on cavity walls, ceilings and lofts etc....

[djperrott]

Hi,
can anyone advise me on the following.

I am wanting to top up my loft insulation, however who put the last roof on, had left a considerable amount of rubble on top of the existing insulation.
I have now removed most of this but it has left quite a lot dust on top of the insulation.
Would it be ok to put a sheet of polythene on top of the existing insulation, ( leaving gaps for the air to circulate), to help contain the dust, before I top up with new insulation.

[stoneyboy]

djperrott,
No, if you leave an air gap there will be no point in increasing the depth of the insulation. With no air gap you will get condensation forming.
end

[djperrott]

stoneyboy,

Many thanks for the reply, seems like I'll just have to lay the new insulation on top of the old then & forget about the dust.