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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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    • CommentAuthorYalch
    • CommentTimeJun 6th 2019
     
    I am putting down a limecrete screed with geocell beneath and am putting a reclaimed junkers wood flooring ontop.

    I am going to use some 40mm wood battens to nail down the wood flooring and keep an air gap to allow everything to ventilate and breath.

    My question is, are 40mm battens going to be thick enough?

    Thanks,
    Jon
    • CommentAuthorgyrogear
    • CommentTimeJun 6th 2019 edited
     
    As I see it, it is not the width of the airspace that counts, but the nature of the wood that will be in contact with the limecrete, because it could ROT...

    https://www.limecrete.net/faqs/

    "Some of our clients have laid timber floors onto the limecrete floor, the best practice for this is as follows:– Store the timber in the room that it is going to be laid in so that it can adjust to the humidity– Lay treated wooden battens onto the screed, this creates an air gap that needs to be vented (possibly through the timber joints)– Lay the timber onto the battens to complete the floor"

    If you don't want copper and arsenic leaching or vaping up into your interior, you might consider using bamboo, or plastic battens: although seemingly more expensive at acquisition, they might leave your lungs alone for a bit longer...

    BTW, avoid fixing the battens themselves to the screed with metal - latter will also rot; rather use nylon nails, sprags etc. That way, less surprises on those occasional disco evenings...

    gg
    •  
      CommentAuthordjh
    • CommentTimeJun 6th 2019
     
    Posted By: gyrogearBTW, avoid fixing the battens themselves to the screed with metal

    Why would you fix the battens to the screed at all?
    • CommentAuthorgyrogear
    • CommentTimeJun 6th 2019
     
    to prevent the floating floor from ... floating !

    gg
    • CommentAuthorjfb
    • CommentTimeJun 6th 2019
     
    Well it's not really going to float if the boards are fixed to battens.

    I have a similar conundrum. Expanded glass sub base, limecrete floor and wood floor. I was planning on insulating 50 mm between battens and no ventilation. If it all.goes wrong not the end of the world and some insulation sounds good.
  1.  
    sounds thick enough
    • CommentAuthorYalch
    • CommentTimeJun 8th 2019
     
    Awesome thanks for your replies, :)

    The bamboo is an interesting Idea for sure, stainable too.
    • CommentAuthorYalch
    • CommentTime4 days ago
     
    @gyrogear any idea on where I would be able to source some bamboo battens ?
    Been looking about and they don't seem that easy to come by.

    Cheers,
    • CommentAuthorgyrogear
    • CommentTime4 days ago edited
     
    well I'm in Old Europe, so I guess this supplier is of no use to you...

    http://www.bobamboo.fr/plancher-terrasse-bambou-44/lambourdes-bambou_4-LAMBB4L22.html

    perhaps click the Contact box and ask them if they have a UK supplier ? (they probably come from PRC in any case...).

    Otherwise, you might have to consider ripping bamboo decking boards, bit of a shame though, not to mention the extra work !
    ...
    Good luck !

    gg
    • CommentAuthorYalch
    • CommentTime2 days ago
     
    Thanks so much :)

    I'll give it a shot!
    • CommentAuthorYalch
    • CommentTime2 days ago
     
    I've found these; https://www.kedel.co.uk/product/recycled-mixed-plastic-square-post-nailer-batten-40-x-40mm/

    Do you think that they would do the job? (just thought I'd double check) :D

    Cheers,
    • CommentAuthorgyrogear
    • CommentTime2 days ago edited
     
    Well, they do not seem to be for inside usage... (but neither is the treated timber recommended in earlier reference...). Perhaps why the technical data does not mention any offgassing risks - viz. VOC's...

    They are treated anti-UV - that probably implies more nasty chemicals...

    (BTW, when I stated "plastic battens" above, I meant "composite wood" - or wood-plastic composite
    https://en.wikipedia.org/wiki/Composite_lumber

    but I see that even *that* can contain nasties so with hindsight, please allow me to pull that suggestion !
    :shamed:

    I'd still try a bit more for the bamboo...

    Declaration of engagement (!) I have rather a lot of PVC windows (but it is uPVC...)
    (but I also live in a radon-prone region...).

    gg
    • CommentAuthorYalch
    • CommentTime2 days ago
     
    Haha no worries. This is all super useful though. Ill keep trying a bit more for the bamboo :)

    Thanks,
    Jon
    • CommentAuthorYalch
    • CommentTime1 day ago
     
    Also, has anyone used insulation dowels on flooring? as they look ideal but I'm not entirely sure if they'll be strong enough as a metal rot free substitute:

    https://www.amazon.co.uk/TOX-Husky-02210246-Insulation-Fixing/dp/B00KWEYE6U/ref=sr_1_14?hvadid=1390680640&hvbmt=be&hvdev=c&hvqmt=e&keywords=insulation%2Bfixings&qid=1560717766&s=gateway&sr=8-14&th=1
    • CommentAuthorYalch
    • CommentTime1 day ago
     
    I've just come across these https://www.mosobamboosurfaces.co.uk/product/bamboo-x-treme-outdoor-beams-chocolate-2000x40x40mm-sku-bo-dtht2173-01/#

    I've asked them the question to see what they are treated with, if anything and hopefully should be good to use :)
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