An alternative to thermafleece?

[Mark]

this is from an advert in this months Green Building magazine

http://www.sheepwoolinsulation.co.uk/categories.asp

I've not seen it, dont know how it compares, I am not associated with this company etc etc etc

 

[MdB]

Something doesn't quite add up. Premium is 25Kg/m^3 and Comfort is 14Kg/m^3. This would suggest that the thermal performance of the two would be different. However, they only give a single figure for thermal conductivity which sounds strange to me. I am sure I am missing something though. Price is about 3x that of Rockwool with similar thermal performance.

 

[Mark]

hm.

and the value they do quote isnt obviously from their own product.

Ive emailed for info and actual figures.

 

[Penners]

Something doesn't quite add up. Premium is 25Kg/m^3 and Comfort is 14Kg/m^3. This would suggest that the thermal performance of the two would be different.

This is more of a general question than one that relates specifically to this product, but I wonder whether the insulation effect of any such material is invariably greater with a higher mass of material. One could speculate that a lower mass of material means more trapped air pockets, thus greater insulation.

But I expect that's just my ignorance talking.

 

[Mark]

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[biffvernon]

Acoustic performance seems part of the selling point. I suspect that the less dense is a better thermal insulator and the more dense a better acoustic insulator. But it would be interesting to hear from someone who knows.

 

[Penners]

That sounds a reasonable hypothesis, since acoustic insulation is partly dependent upon mass.

 

[JW]

try this one:
uk@sheepwoolinsulation.com

or the distributor:
info@skanda-uk.com

found here: http://uk.sheepwoolinsulation.com/contact.asp

 

[Lime]

Acoustic performance seems part of the selling point. I suspect that the less dense is a better thermal insulator and the more dense a better acoustic insulator. But it would be interesting to hear from someone who knows.

Baa!

 

[Penners]

What an a-lamb-ing response.

 

[Nemesis]

Rather a woolly response if you ask me.

 

[Penners]

Well at least he didn't ram-ble on.

 

[NT]

Lets hope your e-mail rams its way through to them. The price is a bit high though, you may be getting fleeced.


NT

 

[Penners]

Sorry NT. We've already had "ram" so only one point for you.

 

[ian]

He will just have to "tegg" what he's given, not "hogget" the praise, and "wether" the comments to come!

 

[Nemesis]

I resisted those. Pity yow couldn't.

We haven't played this for ages - time to revive it?

http://www.david-lewis.com/sheepgame/

 

[Penners]

What a pun-ishing thread this is.

 

[Penners]

We haven't played this for ages - time to revive it?

http://www.david-lewis.com/sheepgame/

But there's nowhere to pen them. Phil Drabble wouldn't have stood for that.

 

[Mark]

for those who are not counting sheep I have a reply -

We measure insulations by u-values. The u-value of the Premium Sheepwool is
0.039 which has a CE Mark and the u-value of the comfort insulation is 0.042
(which we are awaiting the CE Mark on)

Hope this is of help to you.

Feel free to email me your address and I can send you down a sample of both
materials for you to have a look at.

 

[worms]

Meanwhile back on the topic...

This looks to me like the version that has been on sale in Ireland for quite some time. It has always been much cheaper than Thermafleece. I noticed in the past that the main difference is that the Irish one has a rubber content - a natural latex which they say is to help with the Borax treatment.

At the risk of starting off a whole new round of Grimmers/Penners jokes, I do wonder what the rubber coating on the fibres does to the natural properties of the wool as a breathable insulation material. It surely must affect the ability of the fibres to absorb and then shed moisture? Or have I just missed this in the Thermafleece technical spec and they include it as well?

The DIY wool insulation guys seem to manage to incorporate borax without any need for a rubber treatment.