Looking at insulating our house.

It seems to me that applying the insulation to the outside would make more sense. The thermal mass of all the blockwork would work in our favour internally.

Is there an acceptable method of doing this, or does it tank the property value?

they did this on DIY SOS recently. insulated outside then rendered over the top. looked quite good but it depends on what finish other houses around yours have – if yours stands out too much it’ll look like it’s stone clad and value will be hit, I’d guess.

You could do sto render or something similar. Will come out from the elevation a bit but with the right bit of detailing you could make it look fine. Can you not insulate a cavity?

Taff – Member
…Can you not insulate a cavity?

Probably, but it seems a waste to have the thermal mass on the outside of the insulation. I suspect it’s less easy to avoid heat leakage with internal.

with a vented cavity you would still end up with a cold bridge so may be a wasted effort. YOu would end up having to seal it all anyway to prevent a dew point. Not knowing the construction types I’m not sure how it would pan out.

Looking at insulating our house.

It seems to me that applying the insulation to the outside would make more sense. The thermal mass of all the blockwork would work in our favour internally.

Is there an acceptable method of doing this, or does it tank the property value?

Been a number of studies, trial etc for over cladding – often the best solution for existing stock:

– Overclad over old precast houses – anything would improve the look of these!
http://www.steni.co.uk/pdf/casestudies/BRISTOL-Case-Study.pdf

over clad insulation then rendered over
http://www.externalinsulation.co.uk/insulation-process/

http://www.greenspec.co.uk/timber-slate-tile-cladding.php

There are also aerated renders

all depend though on what the existing structure is and also the aesthetic issues/controls/planning B Regs etc