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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorRedDoor
    • CommentTimeFeb 2nd 2018
    Is Orcon F the only gig in town?
    Pavatex make a similar product. Probably others do too.
    • CommentAuthorRedDoor
    • CommentTimeFeb 7th 2018
    Has anyone tried other non-setting sealants? I thought I'd experiment with caravan mastic - not in-situ but stick two pieces of membrane together and leave them under the floor. Hardly a BRE test!
    Pavatex product would be the Pavabond? - seems to be quite rare on the UK market but I'll get a quote from the supplier that comes up on a quick internet search.
    Orcon F 310ml cartridge seems to be more readily available from stockists near me that I already use but pricier. I see that I can get the 600ml sausages from Germany but I'm trying to make more use of local suppliers.
    • CommentAuthorTimSmall
    • CommentTimeFeb 7th 2018
    That might be butyl rubber - which has been used for years and is known to have good longevity. I haven't been super-impressed with Orcon F myself, I've seen it come unstuck a few times.

    Another possible option are MS Polymer adhesives, in the sort of locations that Orcon F is speced for, they have an expected lifetime of 50 years or more (ref https://www.branz.co.nz/Appraisal/419 ), and have been used for about 40 years. Around £4.50 per tube in a box of 12 (e.g. Soudal Fix All Flexi - which used to be called Soudal Fix All Classic). I've found it has more consistent adhesion than Orcon F.

    With both, I'm wary of using them on details which I expect to last more than 50 years (or would result in really massive leaks if they did fail), so things like window surrounds seem reasonable to me, but I'm not a fan of big areas of membrane and sealants in inaccessible locations.

    Generally I prefer to use things like plaster and wood where I can to provide airtightness. I've also sandwiched rolls of butyl tape between timber and render etc. using screws to partly compress the joint.
    • CommentAuthorgravelld
    • CommentTimeFeb 7th 2018
    Fix All does "set" though doesn't it, becomes like a firm rubber? But of the 'mainstream' sealants the polymer ones do seem the best.

    Why not use tape as well?
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