What to fill my wall cavity with

[hughsie]

Hi,

I'm doing a loft insulation. There is an interior wall (blocks) which comes up as far as the 1st floor with a cavity. I am going to dry line from the 1st floor up and use insulation board but what can I put into the cavity ? Insulation board wont slide down so I was hoping that some kind of granual product would work. If I did this would that create a problem with condensation ?

 

[PrenticeBoyofDerry]

Have you thought of having the cavity insulation injected?
It's not that expensive these days and you might be lucky, there could be grants or a decent sized discounts in your area.
If you have the cavity insulated, there would be no need to use internal insulation boards, this save some money and space.

 

[hughsie]

Any other suggestions ? - Was told that it would be much easier to put some product into the cavity before the top was closed off. Back to square one I'm afraid.

 

[Richard C]

Be careful what you use, incorrect or unproven insulation material in the cavity could give you serious damp problems. I did some research intending to insulate the cavityies as part of my own property renovation but after reading some of the horror stories I came across, my cavities will remain empty for the foreseeable future

 

[Bankrupt]

Be careful what you use, incorrect or unproven insulation material in the cavity could give you serious damp problems. I did some research intending to insulate the cavityies as part of my own property renovation but after reading some of the horror stories I came across, my cavities will remain empty for the foreseeable future

I completely agree - And retrofitting cavity wall insulation in the relatively small gap between the two skins gives at best a very small improvement in insulation. Much better for air to be free to circulate between the two skins as was the original design intent of this method of construction.

 

[mointainwalker]

Much better for air to be free to circulate between the two skins as was the original design intent of this method of construction.

Was that really the purpose ? I thought it was separation of the two skins to eliminate water penetration.

 

[Bankrupt]

That as well - The two go hand in hand