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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthorskywalker
    • CommentTimeOct 6th 2009 edited
     
    Don't know if it is Countrywide but the big orange DIY store is doing 2 for 1 on sheeps wool in Chesterfield. I think is was about £23 for a 200mm x 1.1m roll.

    S.
  1.  
    Hi,
    What brand sheeps wool is that? Ive seen various rock/glass/recycled offers but not the real baa baa stuff.
    Is this BBA UK sheeps wool?
    Whats the % wool content? Its not going to be 100% - the batts are about 85%, but the roll is about 65%, they are slightly cheaper. You can compare by volume. The packs for batts @100mm = 10 sqm, the 75mm batts about 12point something. So each pack has the same volume and is therfore the same price it just goes further or less so. So each pack has "roughtly" 1 cubic meter
    How long is the roll? I'm not so familiar with the rolls.
    A pack of 1 cu m "on line" with the usuals is about £80-100 per pack so at 100mm thick thats about £8-10 per sq metre.

    How does this compare

    Cheers
    Mike up North
    • CommentAuthorskywalker
    • CommentTimeOct 6th 2009
     
  2.  
    From web site...

    "For DIY use only - This product is subsidised under the Carbon Emissions Reduction Target. It is not for use in new buildings."

    How exactly can B+Q stop that then...?

    "Further subsidies cannot be claimed by professional installers on this product. This product is limited to 100m2 per customer."

    Per customer... again how would that work then...?

    J

    PS
    Posted By: skywalkerI dont know!, all I went for was a hinge.

    :clap:
  3.  
    You can also check here - npower were doing £1 per roll for loft insulation, but this seems to have expired, but they are now doing 2 for 1 deal. Shame they show nice wolley sheep on their web site with the Rockwool logo underneath. Seems they may be trying to pull the wool over consumers eyes :tongue:


    Anyway, you can check it out here - you never know there may be a sustainable option on their site somewhere http://www.npower.com/web/diyloftinsulation/index.htm
  4.  
    Hi,
    The roll is 370mm by 6m long @100mm thick. It does say R=4.55 which is equivalent to 200mm (lambda = 0.038 approx or .039 – bats and rolls are very slightly different values) which is where the 1.11sq m comes from as it also says “when doubled up”.

    Thus this is 2.2 sq m @ 100mm which at £21.96/roll = £9.86/sq m.

    Eco Merch (no names) online for packs of 3 rolls at 370mmx5.3m is £40.75+vat which equates to £7.96/sq m (inc the vat).

    This seems like a middle price, you can go cheaper on line and get some discount for bulk. That said delivery/transport is a problem due to the bulk.

    Point is - you really do need the 2 for 1 offers to get the value.

    Already had researched just about all sources of wool for current project.

    Cheers
    Mike up North
  5.  
    Guys,
    I insulated my hen house with the real stuff! Farmers have to have the sheep sheared once a year. It costs them to do it and there is almost no value in the fleece. Find a friendly sheep farmer who will give you lots of fleece for very little hard cash. I got a 1 tonne bag full to the brim for free from my sheep farmer. Chickens are now nice and cosy and condensation free! The only down side is the stuff is smelly. I encapsulated it between the metal roof and plywood to keep the moisture out and the smell in. All the edges of the ply were vapour sealed and the ply was painted. Works a treat!
    • CommentAuthorskywalker
    • CommentTimeOct 7th 2009
     
    I suspect using untreated wool with all the clags & uncleaned wool from the belly & crotch area is probably a bad idea. It will probably just compost & attract wildlife.

    Spinners will not take wool from a sheep that has been recently dipped or sprayed for pests & I think this may be true for commercial interests as well although I have no idea if this is a problem in loft insulation.

    There is no value in a lot of individual fleeces as they are unusable. I think themafleece use herdwick wool, which is a bit rubbish for most other uses, & so take only good quality fleeces for their insulation.

    Could be wrong!

    S.
  6.  
    Use of raw(er) wool at CAT:

    "Three tonnes of Welsh Steel wool has been donated by the British Wool Marketing Board in support of the Centre's pioneering work. Scoured (to wash off the grease and dirt) and carded (to align the fibres), the fleeces are sprayed with borax on site to protect the wool from fire and insects."

    J

    http://www.cat.org.uk/news/news_release.tmpl?command=search&db=news.db&eqSKUdatarq=10340
    • CommentAuthordickster
    • CommentTimeOct 7th 2009
     
    Welsh Steel wool?
    • CommentAuthorpmusgrove
    • CommentTimeOct 7th 2009
     
    Best deal I found was from SIG at £6.14 per sq m (excl VAT) for 100mm depth. At that rate it is becoming cheaper than many other alterntive insulants.
  7.  
    <blockquote><cite>Posted By: dickster</cite>Welsh Steel wool?</blockquote>

    Their typo I think, blindly copied by me.

    J

    ..from steel sheep...?
    • CommentAuthorskywalker
    • CommentTimeOct 7th 2009
     
    Welsh Steel wool is, more or less, the same colour as the stuff from herdwicks & thus of not much use for textiles.

    Interesting info in the CAT release states that much wool insulation in the UK is produced from Ausssie or Kiwi wool.

    Not quite as 'green' as I thought!

    S.
  8.  
    The SiG price is very good – Roll or Batts?. Elsewhere I got down to just on £6.9/sq m @ 100mm this was for Batts. The roll at 65% content is usually a bit cheaper as the batts are 85% wool (£8-9/sq m). Some online retailers are pushing the 10sq m packs of Batts at up to £110 so there is a wide price range - search. Haulage charges can be an issue if you are out with the midlands (or main industrial regions) where distribution is easy. Also many (SiG included) wouldn’t do it for me at anything smaller than a whole lorry load to their depot (that’s even before the onwards delivery to door). This means to compare what’s the best deal you have to add in the haulage charges as invariably those offering the best deal wont/cant do a delivery. Therefore, a slightly higher price that can actually be delivered is sometimes necessary. I had 2 or 3 good price quotes that ended as can’t be delivered.

    As to where it’s from. A quick scan through suppliers shows some don’t mention anything at all about origin, but some do specifically state that it is welsh or Cumbrian. That was also one of my criteria – that it was produced in the UK.

    Cheers

    Mike up North
    • CommentAuthorTerry
    • CommentTimeOct 8th 2009
     
    Skywalker - the CAT release was dated 2000. I think a few things have changed in the UK wool insulation industry since then, but to what degree I am not sure.
    • CommentAuthorskywalker
    • CommentTimeOct 8th 2009
     
    I'm sure they have Terry.

    Although I may switch to calling it 'Wool Rich' insulation (a La M&S socks) as this is a fairer description it seems.

    Interestingly I got my foam insulation from Sheepbridge.

    But these things can keep you awake at night!

    S.
    • CommentAuthorpmusgrove
    • CommentTimeOct 8th 2009
     
    The wool from SIG was in rolls. I took delivery of 200sq m worth of the 150mm deep stuff with no charge. Didn't realise that it wasn't 100% wool though. Will go and look at the label.
  9.  
    Hi,
    They mix in various binders to hold it all together. The batts are surprisingly strong - you certainly can't tear it. You can separate layers a bit. Its quite good to work with as it stays to gether in a slab.
    I'm really impressed with working with it.
    Cheers
    Mike up North
    • CommentAuthordavid2686
    • CommentTimeOct 13th 2009
     
    Just been looking at the safety sheet on the B&Q website. It says there is only 50% wool in the product, yet the packaging doesn't state this. The Trading Standards office would have a real problem with their labeling.
    Thought I would checkout SIG, their web site says that it is wool and deosn't mention anything about plastic. spoke to the local branch, he said it was 100% wool. I said I heard it wasn't. He checked and came back to tell me it was in fact only 60% wool, he didn't know why SIG didn't tell the truth on their web site. Wonder what the Trading Standards would say of SIG. Found out that they get it made by the same company as B&Q - Cottons. Must be the same product but one says one thing the other says another.
    Got the bit between the teeth and phone Thermofleece, they said they had two products the rolls have only 60% wool their batts have 85% wool. They said they put plastic in for transport savings, they also said there was significant price difference between their two products - think we have now found why everyone sticks lots of plastic in ! They do state the facts on their website though. They get theirs made by Cottons - interestingly they all claim different thermal performance.
    Thought I would try one more Black Mountain, spoke to a local distributor he said they had their own factory. decided to call the factory, the girl said they have min 85% wool and that they make it themselves they have the only dedicated factory in the UK. she passed me to the boss, I asked him why did he have 85% wool and others didn't. He said that others were trying to get the costs lower sinc ethey had others taking a slice of the cake. Aksed him how could I be certain that he din't have lots of plastic in the product. He invited me to the factory, said I could drop in uninvited and have a look at the formulation they have dialed into their production computer. Invited me to take any roll from their stock and unroll it to check the gauge, said I could look at their termal testing and invited me to bring some material with me to have it tested in front on my eyes. Aksed him to comment on the otehrs he said that thermofleece batts were good quality. He thought all the rolls from B&Q etc had the same formulation but hadn't tested the competitors product for a few months, his view was that if you want plastic buy plastic if you want wool buy wool from them or Thermofleece.
    I am going to Chester on Monday so I am going to take him at his word and drop in before I decide who I buy from. will let eveyrone know.
  10.  
    Hi, that was interesting. I think the origianl idea with the addition of non wool fibre was to add some binding to hold it all together. it certianly does not look or feel like a sheepskin rug. It actualy not that different in feel from the e-cosy Knauf? (i think thats a wrong spelling) batts which are brownish and also not unpleaseant to handle. I suspect that this is now taken advantage of to bulk it up a bit with cheaper wastes. You have to remember that there is a big difference between those selling it and those making it (applies to everything). How often has a sales person in response to a question said "dunno - I just sell the stuff". You have to do your own invetsigations.
    Looking forward to your visit report.
    Cheers
    Mike up North
    • CommentAuthorTerry
    • CommentTimeOct 14th 2009
     
    Interesting david2686. please report back.
    The Black mountain product tears easily across the roll, but not down the length of the roll, so had presumed the plastic was laid across the line of the wool fibers to hold it together a bit better.
    • CommentAuthorJulian
    • CommentTimeOct 14th 2009
     
    In the past I have used Thermafleece and I have used Black Mountain. Now I would only use Black Mountain. Reasons exactly as Dave describes. If going to the trouble of buying wool BM is the best option I reckon. The use of polyester in some of the wool mixes is also to bind the material together into batts and it helps with lofting (both according to Thermafleece manufacturer).
    • CommentAuthorskywalker
    • CommentTimeOct 14th 2009
     
    Without being at all funny 85% wool is still 'wool rich' rather than Wool isn't it?

    I appreciate the 'need' to add other materials but they stop the product from being Wool (100%).

    A bit like 100% recycled paper toilet roll or toilet roll which contains a proportion of recycled material. They are different products.

    I'd still use it if I could by the way, I'd just rather the contents were right 'in your face'.

    S.
    • CommentAuthordavid2686
    • CommentTimeOct 14th 2009
     
    Post all the questions you can think of and I will try and get answers, he seemed quite open to me. I am going to take my camera and ask if I can take some photos, might be pushing my luck. The Black Mountain distributor I spoke to was actually quite good he had been to the factory and knew the boss, he also had sold Thermafleece batts for a long time. Thought both products were good, however didn't understand why Thermafleece has stuck plastic in their rolls, said that Thermafleece had told him it was the same as the B&Q product and they were very embarrassed. Will post what I find out next week
    • CommentAuthorskywalker
    • CommentTimeOct 15th 2009
     
    Please could you ask him why it does not specify anywhere on the front page or in the technical data or the product details section of his website that his product is in fact 85% wool & not Wool as it claims.

    S.
    •  
      CommentAuthorDAI_EVANS
    • CommentTimeOct 15th 2009
     
    <blockquote><cite>Posted By: dickster</cite>Welsh Steel wool?</blockquote>

    Wales where the men are men and the sheep are scared! Welsh Steel Wool proves this phrase! haha! Dim problem!
    • CommentAuthordavid2686
    • CommentTimeOct 21st 2009
     
    Just to inform everyone of my visit to Black Mountain
    Decided to call ahead and ask if it was OK to visit, they said absolutely. Met the boss Andrew Evans who took me round. Very modern big factory, highly automated not what I was expecting. Asked him about the wool and polyseter argument, he explained that to make the insulation they need to glue the wool fibres together or they will compact. The adhesive they use is a polyester that melts in their big oven which then sticks the fibres in place.
    He said they only use it as a adhesive not as a cheap filler like some other products. He actually changed the formualtion for a few mintues to show me the result at the end of the machine, the product fell appart. Don't worry all the material was recirculated to the front of the machine. I was convinced they use it as an adhesive not a cost reduction.
    He also said they were running tests on other adhesives made from corn (I think he said) said it will take time to do all the test to ensure the product lasts 100 yrs.
    They had lots of charts on quality control and I saw them feeding product back into the machine which wasn't good enough, i was convinced that thye were serious. Also showed me daily charts on gas and energy said they were passionate about embodied energy. He asked me to choose a roll from their stock which hethen laid out in the room they use for comparison between products, had lots of rolls laid out. from glass fibre to green polyester.
    That was really interesting, they had a B&Q roll from a year ago and a B&Q roll which they bought last week, for a 100mm product the one year old was only 50mm thick. The one from last week was only 65mm thick. laid out the roll we took from stock it was 90mm, he gave me a fresh roll to take home and said leave it few hours and check it again. Measured it today sure enough 100mm +. He was careful with his words regarding B&Q, wouldn't comment on SIG said they were made by Cottons also and that he thought they were all the same formaulation but couldn't confirm this. He said Black MOuntain only made product for themselves and thought the were the lowest price since they didn't pay anybody else a slice, didn't need to add plastic to get the price point. He said only Thermafleece batts and their product were real wool the rest were poly cotton sheets in his mind.
    He also asked me to walk up and down on the various rolls, to show recovery, the wool products recoverd almost immediately, the glass fibre was rubbish you could see deep foot prints.
    Showed the reason why it tears across but not down the roll, it is because the fibres of wool are combed in one direction to a very thin layer and then the layers are built up to make the product.
    I was impressed, nice people it was worth taking the time to visit especially sinc ehe gave me a roll free, only another 99 visits and I can do my project for free.
    • CommentAuthorJulian
    • CommentTimeOct 21st 2009
     
    David
    Thank you for taking the time to do that research and very interesting to read, bearing out my own experience when I spoke to Andrew. I guess, as with most things, you pay your money and make your choice. Perhaps, for the sake of absolute clarity, it should state (if it doesn't already) somewhere on BM's site the proportion of polyester added or the percentage of the product that isn't wool.
    julian
    • CommentAuthorTerry
    • CommentTimeOct 22nd 2009
     
    Cheers David, very interesting
    I also had a long and helpful chat with Andrew earlier in the year which resulted in us buying from them.
    Simple to fit and easy to work with.
    The blokes helping were very impressed, even if only because they didnt itch after :bigsmile:
    • CommentAuthordavid2686
    • CommentTimeDec 21st 2009
     
    Worth reading pervious discussion on sheep wool, if you get a chance to go the factory worth the time, yuo will learn a lot, make sure to speak to Andrew Evens. Interesting I went to B&Q to compare their product and they had withdrawn the product from sale. Evens reckons that Black Mountain and Thermafleece original product is good, he said many others had put lots of plastic in, wouldn't give me any more but said to compare the material myself.

    http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=4637&page=1#Item_29
   
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