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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Products: torch-on membrane systems - v - the sticky stuff

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  1.  
    • CommentAuthorCassie
    • CommentTimeApr 17th 2009
     
    Have any of you any experience of dealing with a waterproof tanking membrane that is torched- on as opposed to the sticky backed membrane that you peel off and stick on??

    I am not looking for comments on the quality of the systems etc - (no backdoor badmouthing), I want to know, from a users point of view what they are like to handle?
  2.  
    Hi Cassie. No experience of either I'm afraid. But I have used an SBR product which is mixed with cement and painted on. Let me know if you want to know more.
    • CommentAuthorCassie
    • CommentTimeApr 21st 2009
     
    Sad to say I am finding tanking/waterproofing fascinating ( Oh Dear !).

    I need a rhobust product that can stand the pressure 5m down in clay, that can bind with the underslab and the roof membrane.

    Spoke to manufacturer of above products at length, torch on very expensive, but, "you gets what you pay for" and I can't afford to get this bit even a tiny bit wrong.

    Any knowledge of products that can fit the bill ( I have looked and looked ) I would be very happy to be pointed in their direction - post or e-mail me.
  4.  
    Not sure the SBR product I used is robust enough for you then. The scenario I had was only 2.5m deep with no significant sign of water penetration or dampness.
    • CommentAuthorSaint
    • CommentTimeApr 21st 2009
     
    In a former life...working on water retaining structures, underground, above ground, sewage treatment works, reservoirs etc. etc we used miles and miles of Bituthene tanking membranes. Easy to apply, tough, self sealing you name it. Worth a look at the range anyway
    http://www.uk.graceconstruction.com/product.cfm?mode=c&id=2&did=11

    Expandite and Schlegel had alternatives but not sure if they're both still around in this market segment
    • CommentAuthorTerry
    • CommentTimeApr 21st 2009
     
    Berm house near us build many years ago used torch on membrane and they swore by them. When I was there 7 or 8 years ago they had had no problems. they were also members of an earth sheltered building association - cant remember the name at the mo. Have seen them mentioned on this forum before, but probably find them through google. Probably a mine of info on this subject.
    Just looked them up - BESA - British Earth Sheltering association http://www.besa-uk.org/
    hope that helps
    •  
      CommentAuthornigel
    • CommentTimeApr 21st 2009
     
    Have you looked at Vandex BB75 - works at a pressure of up to 6 bar.
    • CommentAuthorCassie
    • CommentTimeApr 22nd 2009
     
    Nigel, have looked at Vandex - cant remember the specifics of why we rejected - something to do with the need for roof and underslab membranes to bond with the wall tanking to provide a waterproof envelope right round the house.

    Terry - BESA they ( or rather Arthur Quarmby ) designed my house!

    Its the heavy nature of the surrounding clay that we need to account for, Visqueen were worried about the sticky membranes withstanding the pressure, particularly the joints.

    Also looking at Grace Construction and their Bituthene 8000

    Torch-on winning so far ( but crickey its expensive)

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