foam glass costs and suppliers

[Anonymous]

Hi! I've been trying to find cost effective foamglass here in the UK and I've been quoted List price for 100mm £62.99/SqM supply only.Don't think that will be going in in the quantities used in Europe for PH detailing unless anyone has other experience? Thanks for any comments.

[Anonymous]

Hi Kimi,

Might be able to help there – drop me an email on john.cave@ehsmith.co.uk with location and quantity and I'll see what we can get. Pitsburgh Corning are very strict on pricing and charge seperately for all deliveries, special requirements etc. Having said that, we are major customers of one of their distribution partners so we should be able to get you some decent discounts.

Best regards

John

[Nick Grant]

Kirsty

I asked John to look into this and post on forum so don't take it as a random sales pitch!

This certainly seemed to be material of the month on the CEPH Designer course.

Nick

[Tom Foster]

Why?

I see it's also used for EWI on the Cavendish Avenue, Cabmbridge house in the new Winter 09 Green Building mag.

[Nick Grant]

Tom and John

I think, from previous conversations, that Kirsty is asking about foam glass gravel for use under a ground bearing slab. Much cheaper than foam glass batts and in Germany, competitive with EPS.

Agree seems odd to use solid foam glass as EWI unless trying to get rid of cash as quick as possible.

[Mark Siddall]

Tom,
Why, what? Why interest in Foamglass on the course? Why foamglass? What?

Mark

[Tom Foster]

Why 'seemed to be material of the month on the CEPH Designer course'? – but don't worry, Nick removed my cause for query, and brought a v interesting material to my attention.

[Anonymous]

Will report back when I have heard from Germany

[David Olivier]

This is why I prefer aerated concrete which has a compressive strength sufficient to support quite a heavy building.

Also FWIW cellular glass (foamglass is a tradename) can absorb water and underground it can be damaged by vermin as proved by a long-running case in Belgium. But the greenwash is impressive.

D

[Nick Grant]

David

The German architect who were keen on it said there was no vermin problem with aggregate. Is aerated concrete available as aggregate to use in this way, ie as insulation under a reinforced slab?

Nick

[Mark Siddall]

Aerarated conc is susceptible to absorbing moisture also – overcoming capillary action is the issue. Would large enough granulated pieces help address this?

Here's an example of the foamglass aggregate from Hasopor (George from Architype first brought this to my attention) http://www.hasopor.com/

Mark

[David Olivier]

Mark

Yes aerated concrete does absorb moisture. Because of this tendency, the mfcrs. can give you a separate conductivity for use outside the DPM, versus for use inside it. One product has figures of 0.11 and 0.19 W/mK respectively.

For celular glass, I have yet to see two separate figures quoted, although the “battle in Belgium” may lead PC to start quoting two.

BTW I wouldn't expect there to be much wildlife below the centre of a floor but the authorities which have warned of this risk to insulation such as XPS have proof that vermin can cause damage e.g. to the outside of basement walls 750 mm below ground.

Cheers

David.

[Mike Jacob]

David

Do you have any further info on the Belgium case?

[Author]

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