Injecting cavity wall insulation

kjacko · 17 Mar 2009

Could some kind soul point in the right direction here please?

Our new extension is almost finished and we're ready for insulating it. Don't ask me why the builders didn't put the usual type of insulation in, they just didn't.

So the only way to insulate it now is to have it injected.

So, i need to know who to contact to get it done etc.
Are there any grants available to help out with this kind of insulation, bearing in mind its not pre-existing, its a new part of the house.
The extension is approx. 24sqm, but one 3m wall is ony 600mm high up to the windows. I haven't worked out the cubic requirements is yet (if it indeed matters at this stage).

Any help would be appreciated, thanks

Mikejf · 17 Mar 2009

How did building control pass that?

kjacko · 17 Mar 2009

Oh they knew about it, they just agreed that injection insulation is fine after its all been sealed.

stuart45 · 17 Mar 2009

This method has been used on some sites, because it is thought to be more cost effective taking into account the bricklayers time to install it as it is being built.

kjacko · 17 Mar 2009

yeah, quite possibly.
I've since managed to find a place on the interwebby that has taken my details and will let me know if we're eligible for a grant, and if not, how much to do the job.

Would still appreciate any further input though

Fluffster · 18 Mar 2009

I have seen it done on site before they put the roof on to minimise drill holes but have to say much better done with slabs during the blockwork as you will not have any gaps and excessive bridging of the cavity as in blown insulation.

However I have had my 1940,s end of terrace blown filled and the differencr in heat retention is considerable.

Pete

ps why are you looking for grant I would have thought this cost would have been included in the original build budget,

kjacko · 18 Mar 2009

ps why are you looking for grant I would have thought this cost would have been included in the original build budget,

We discussed this with the builder, who happens to be one of my best friends and although it was included we'd not paid for it.
My firend has given me all his labour for free

. All we have paid for is materials which as he is in the trade, is discounted as opposed to what we'd pay.
Overall we reckon he has saved us over £10k on the project, so we aint complaining.

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Injecting cavity wall insulation

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