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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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    • CommentAuthorShevek
    • CommentTimeMar 30th 2022
     
    What other reputable adhesive airtightness/windtightness tape options are there besides Pro Clima & Tremo-Illbruck? A contractor I'm working with would like some alternatives to price up.

    And what are the most common reasons to avoid cheap alternatives? I presume longevity, anti-tear resistance, flexibility and strong adhesive are the main factors? Have you had any bad experiences with tape?
    • CommentAuthorRex
    • CommentTimeMar 30th 2022
     
    I guess I was a bit of a cheapskate with my taping for my tf house.

    I used the thin, aluminium duct tape everywhere. Around the windows, tf panel joins, etc. My belief was that I don't know how long the adhesive will last for any of the tapes, and I don't know how long the actual tape will last, but as all the tape is sandwiched between whatever is it struck to, and then the Fermacell is covering, the tape will not go anywhere and the ali (albeit very thin) will not degrade whatsoever.

    Best of all, it is not expensive! And I got a much better air tightness score (1.7 per hour) than the pre-build (9 per hour) and planning approved calculation.
    • CommentAuthorJeff B
    • CommentTimeMar 30th 2022
     
    I concur with Rex. As long as the tape is effectively sandwiched between two surfaces I can't see a problem. In my case I used aluminium tape to tape joins in Celotex boards which were then covered with plasterboard. I did need to clean the area around the joins first as I found that the tape did not stick very well unless I did this first.
    • CommentAuthorrevor
    • CommentTimeMar 30th 2022
     
    You could consider Tyvek acrylic tape I used this around windows tried and tested for some time about £25 per roll it can be made more economical in use by slitting down the the middle I use aluminium tape to join insulation boards I found Tickitape brand really good. I found unbranded tape i.e. with no name did not adhere as well.
  1.  
    Some (maybe not all) foil tape does not perform well under tension, particularly at changes of plane - for example where taping a sloping ceiling to an adjacent vertical wall, where the tape is folded at 90 degrees. If there is any movement when, for example, plasterboard is fixed, the tape can just split. 'Proper' a/t tape takes much more provocation.
    •  
      CommentAuthordjh
    • CommentTimeMar 30th 2022 edited
     
    Posted By: ShevekWhat other reputable adhesive airtightness/windtightness tape options are there besides Pro Clima & Tremo-Illbruck?
    Another name often mentioned is Siga, but that will just scare your price-sensitive contractor :) Their Sicrall has by far the strongest adhesive I found. We used it to secure things to pull them through our bales (i.e. in tension on the tape). I used their stretchy Rissan tape in preference to the EPDM grommets for sealing around cables after I used it to seal around the MVHR ducts.

    Pro Clima advertise testing their tapes to a 100 year lifetime (by some accelerated process or other), so the theory is that the 'better' products last longer and have better adhesives whilst the 'worst' products may stick well initially but work loose quickly. That matches my limited experience with Pro Clima and Siga versus duct tapes and ali tapes.

    edit to add: I've just seen Nick's post and would agree. Even with good tapes though it is always advised to make sure there is some slack in corners and other joins in order to minimise tension.
  2.  
    djh wrote: ''edit to add: I've just seen Nick's post and would agree. Even with good tapes though it is always advised to make sure there is some slack in corners and other joins in order to minimise tension."

    Perhaps use 'proper' a/t tape at perimeters and foil on butt joints if finances are tight.

    Pavatex do a/t tapes too. Plenty of search results.
    •  
      CommentAuthordjh
    • CommentTimeMar 30th 2022
     
    FWIW, I found a PDF of a paper entitled "Durability evaluation of adhesive tapes for building applications" that discusses how to test tapes. It looks a serious piece of work but unfortunately it doesn't name the four tapes they tested. Maybe somebody can work it out from the details they do give?
    • CommentAuthorbhommels
    • CommentTimeMar 31st 2022
     
    +1 for Siga. Not for their price tag though!
    • CommentAuthorSimonD
    • CommentTimeMar 31st 2022
     
    I've used quite a bit of Gerband tapes, both internal and external ones. Price is pretty good. I'm happy with the tapes - very sticky and very stretchy.
    • CommentAuthorjms452
    • CommentTimeApr 3rd 2022
     
    For membranes and things that could move/flex I think you want a decent proven tape.

    Ten years ago when extended I also I stuck some strips of polythene together with Tescon no 1 - it's still totally solid.

    5 years ago I blocked some holes in a scavenged hdpe water butt with the same and it's sat there wet with force on it, either baked in the sun or frozen ever since - still perfect too.
    •  
      CommentAuthorfostertom
    • CommentTimeApr 4th 2022
     
    Posted By: Jeff BI did need to clean the area around the joins
    How did you do that? VOC-laden solvent? Scrubbing brush dipped in the scummy rainwater barrel?!
    • CommentAuthorShevek
    • CommentTimeMay 9th 2022
     
    I came across ISO Chemie EU today. Has anybody used their products? They look very good, but I have no idea how they compare on price.
    • CommentAuthorJeff B
    • CommentTimeMay 9th 2022
     
    Posted By: fostertom
    Posted By: Jeff BI did need to clean the area around the joins
    How did you do that? VOC-laden solvent? Scrubbing brush dipped in the scummy rainwater barrel?!


    From memory, I rubbed down the area around the join (approx 2" either side) with a very fine sandpaper followed by a cloth dampened with detergent-water and dried off with kitchen roll. I find that Celotex has a slightly waxy surface which prevents the Alu tape from sticking properly but cleaning the edges as described eliminated this.
    •  
      CommentAuthordjh
    • CommentTimeMay 10th 2022
     
    Posted By: ShevekI came across ISO Chemie EU today. Has anybody used their products?
    I haven't used them but they do have a good reputation. Their ISO-BLOCO is an alternative to Illbruck Compriband. Illbruck is another company with good products.

    They look very good, but I have no idea how they compare on price.
    Me neither :(
    • CommentAuthorgravelld
    • CommentTimeMay 11th 2022
     
    I used bloco one on our windows,good stuff! And the scraps were really useful for all sorts later :smile:
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