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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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    • CommentAuthorrevor
    • CommentTimeSep 10th 2021
     
    Will be bonding 250 mm wide x 60 mm thick cork fa├žade board to the plinth of a wall with Isovite e cork adhesive. The substrate stone wall was rendered with I believe a similar material to the adhesive I am going to use and think was finished off with a lime putty final coat about 2 years ago. The surface is a bit dusty but not all that much and brushes off easily. What I am unsure of is whether to seal the surface with something or wet it or leave as it is. Any suggestions welcome.
    • CommentAuthorSimonD
    • CommentTimeSep 12th 2021
     
    While I've used the e cork adhesive on moisture absorbent clay bricks without problems - at least not yet - I'd be tempted to insure the plinth on something dusty with a coat of primer.

    This product by EWI pro is what I used for my plinth insulation (I went for EPS plinth insulation) and it took no time at all to apply

    https://ewipro.com/product-item/water-based-primer/
    • CommentAuthorrevor
    • CommentTimeSep 12th 2021
     
    Posted By: SimonDWhile I've used the e cork adhesive on moisture absorbent clay bricks without problems - at least not yet - I'd be tempted to insure the plinth on something dusty with a coat of primer.

    This product by EWI pro is what I used for my plinth insulation (I went for EPS plinth insulation) and it took no time at all to apply

    https://ewipro.com/product-item/water-based-primer/


    Many thanks looks like what I need have 3 other primers but are not vapour permeable. Found 3 on line suppliers 2 wanted ┬ú35+ for delivery on pallet the other supplier free delivery but problem with site not taking payment. Will call them tomorrow have no email address for them nor enquiry form. May try plain water to dampen surface won't be any danger of the boards falling off trapped at top and bottom and no load on them. Being fa├žade boards they are left plain faced.
    • CommentAuthorSimonD
    • CommentTimeSep 12th 2021
     
    Have you tried EWI Store: https://ewistore.co.uk/shop/ewi-301-water-based-substrate-primer/

    I've had some good service from them.
    • CommentAuthorrevor
    • CommentTimeSep 12th 2021
     
    Posted By: SimonDHave you tried EWI Store: https://ewistore.co.uk/shop/ewi-301-water-based-substrate-primer/

    I've had some good service from them.


    Yes they quoted on the pallet in checkout. If they were open today would have asked if they could send it another way. A month ago I bought 5l of hydraulic oil for £7 carriage. The vendors of insulation etc are geared up for pallet deliveries so can't really blame them.
    Meanwhile have just done a test with an offcut but no idea how long it takes to "go off" there is no indication on the data sheet nor of the working time of the mix. Do you recall how you fared with these parameters?
    Have prepared my panels ready so just need to fix now.
    • CommentAuthorSimonD
    • CommentTimeSep 13th 2021
     
    How strange, and annoying. I've had a normal courier delivery from them.

    Temperature dependent I get a good two hours or more working time. I haven't needed longer for any mixes yet. In terms of set, the boards have been pretty well set in a couple of hours even when the mix hasn't fully cured (it's often quicker as i had real trouble adjusting a misaligned board less than half an hour after intallation).
    • CommentAuthorrevor
    • CommentTimeSep 13th 2021
     
    Posted By: SimonDTemperature dependent I get a good two hours or more working time. I haven't needed longer for any mixes yet. In terms of set, the boards have been pretty well set in a couple of hours even when the mix hasn't fully cured (it's often quicker as i had real trouble adjusting a misaligned board less than half an hour after intallation).


    Thanks Simon much appreciated. The test I did seems to have stuck well but not tugged too hard on it yet. The mix that oozed out between the board was still soft about 2hrs after fixing so seems to be about same as your findings. I am hoping not to have to realign boards as I have already aligned them dry, cut around obstacles and found the high point in the run.
    • CommentAuthorrevor
    • CommentTime6 days ago
     
    Completed the job worked out really well the adhesive very easy to mix and work with apart from it being rather dusty. Has good open time at least 2 hours was well set next day really hard after 2 days. When took test piece off the wall it was really well bonded, adhesive stayed on wall came off the board. Did not need the primer coat but if I need in future a water permeable primer I will know what to get. So thanks again for the info.
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