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  1. #41
    Quote Originally Posted by Forest Way View Post
    Hi,
    Just in case it’s of interest to anyone else, it looks like I will be using 12mm Celotex to line the pond pre fibre glassing, and I guess this save on the cost of rendering, but even at the best price I can find on it still coming in at a smidge over £600.

    What I keep forgetting in my calculations general musings is that alongside the pond is going to be the veg filter ( or anoxic, subject to much more reading, and no doubt posting) the is the same length of the pond so it 6x1x0.5M deep and is going to be quite a structure in its own right, and given that it contains the ponds water obviously I don’t want that leaking, so should be given the same amount of consideration wrt construction as the main pond, so that’s going to be foam lined and fibre glassed also.

    I've started to make enquiries about fibre glassing, but if anyone can make a recommendation it would be much appreciated.

    progrees this week:
    innner and outer walls up to ground level.
    back filled and whacked all around the edges
    Cabling for the outer ‘brick’ lights and the inner pond lights is in
    Stainless steel window frames have been repaired, as they were slightly out of line.

    No pond work this weekend as I am knocking down walls in the house, and adding to the massive wate pile in front of the house, (already had 5 grab trucks)

    Hope you are enjoying your ponds and one day hope to be joining you in that ;@)

    Cheers,
    Steve H

    Attachment 23755Attachment 23756Attachment 23757
    Travis Perkins had a special offer on Celotex last week, might be worth a call rather than looking online?
    Ask for trade price, although Recticel is usually cheaper.
    Also, you can pick up some job lot bargains on insulation left over from bigger construction projects.
    I would have thought that your veggie filter wants to be constructed in exactly the same way as your main pond.
    It’s effectively another pond just smaller.


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    Last edited by bigcarpchaser; 26-05-2018 at 10:23 AM.

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  3. #42
    Hi all,
    No construction progress this week, but I have ordered about 75M2 of 12mm PU foam from East coats Fibreglass, which looked like the best value.
    12mm celotex is the better value per M2 but from what I can see this is only available with foil on both sides, which (I assume) wouldn’t be a good surface for the fibreglass to adhere to.
    So foam sheet procured, so what I’m thinking about now is how to fix it back to the block, I was thinking about using pink grip or similar, but also thinking gun grade foam adhesive would be quite good- appreciate your

    for fibre glass lining, 2x layers of 450g CSM and a surface tissue would appear to be standard..... any thoughts on this as it’s the next big purchase ??

    Butrons have advised that the drum filter is ready and the mahoosive bio stage is ready for testing so hopefully I should get these next week, and hopefully the pond glass.

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  5. #43
    Foil on Celotex/Kingspan is fine, it’s what 99% of people use.
    Mine was done last week, it’s hasn’t fallen off yet


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  7. #44
    Not sure if any of the usual glassing companies use tissue. Just 2 layers of glass and the flowcoat.
    Worth a look through the pond build section.
    Whatever you choose it’ll be covered in biofilm/algae in a year anyway.
    Don’t expect a finish like a prefabricated pond they’re made in a mold so the finish is different, much smoother. I think the tissue will give a smoother finish but not sure if that’s a major issue in a pond. You’ll have a few imperfections I’m sure.

  8. #45
    Senior Member Rank = Gosai Brandlin's Avatar
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    The guy on youtube (GRP lining i think?) uses a single layer of 600 with tissue then flow coat, rather than the more common 2 layers of 450 and flow coat.

    Also some of the fibreglass suppliers offer 2 x 450 plus tissue in their kits (perhaps to push a bigger sale by including tissue?)

    Tissues does give a smoother finish. But Like you say BigCarpChaser I don't know whether that matters significantly?

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  10. #46

    36000tr/8000Gal new Pond

    GRP probably have to offer an alternative USP to justify their “high end” prices 36000tr/8000Gal new Pond


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    Last edited by bigcarpchaser; 03-06-2018 at 10:47 AM.

  11. #47
    Senior Member Rank = Gosai Brandlin's Avatar
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    Yeah perhaps - i have no idea on their pricing so can't comment.

    Applied correctly with full saturation of the matting, there would be little difference between 2x450 or 1x600 mat for the purposes of lining. 450 is easier to work with around corners.

    I suspect that because tissue gives you a much better surface finish at the time the installer finishes the job and leaves its easy to see that this might look like a better job although functionally its just the same? that would be the USP you suggest.

  12. #48
    Yea..I had a price from them, I nearly fell off my chair!
    Bob was less than half but I had to do the celotex which took about 3 hours and cost about £140 for all the materials.
    The glassing of my pond took 2 men 6 hours or so including a lunch break.
    I had an idea of how much the materials cost and even allowing for an overnight stop at The Hilton and Lunch at The Ivy (leaving a generous tip) I was still gobsmaked.
    Still, don’t blame them for trying. Nice work if you can get it and I don’t suppose there’s one a week...or maybe there is?
    Out of all the jobs involved in constructing a pond glassing is one I wish I’d been brave enough to try myself. I’d definitely have a go if I were to do a third pond but after some practice on a few cardboard boxes
    I think knowing how long you can use the resin for before it goes off is maybe the key.


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  14. #49
    Senior Member Rank = Gosai Brandlin's Avatar
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    I agree the celotex certainly looks the way to go* Far easier than a render and seal job. But then I'll turn my hand to anything except plastering - I never got the knack of that - proper art form.

    Pricing - maybe thats why GRP lining is always complaining about the quality of the covers his clients put up - they simply can't afford a good cover after they pay him!

    I've done some fibreglassing work previously but that has either been within a form or using woven sheet - and nothing remotely the size of a pond. Certainly the trick I found was to half the volume of resin that the pro's mix. And then half it again. When you are uncertain its far better to work in smaller volumes to keep the working time down. As long as you keep going and you haven't overloaded the hardener then you wont have any problem with your next batch adhering to the previous one.




    * note i have a few questions about insultation and how best to do it, but that's probably for a different thread.

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  16. #50
    Senior Member Rank = Supreme Champion freddyboy's Avatar
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    Quote Originally Posted by Brandlin View Post
    The guy on youtube (GRP lining i think?) uses a single layer of 600 with tissue then flow coat, rather than the more common 2 layers of 450 and flow coat.

    Also some of the fibreglass suppliers offer 2 x 450 plus tissue in their kits (perhaps to push a bigger sale by including tissue?)

    Tissues does give a smoother finish. But Like you say BigCarpChaser I don't know whether that matters significantly?
    my pond was lined with 600 fibre glass plus tissue.

  17. #51
    Hi All,

    Quick progress update;
    I lined the pond with 12mm PU sheet last weekend, and have Warning for anyone considering it.... it’s bloody evil stuff the dust is like horrible shards of glass that float around and get in your eyes every few minutes, safety glasses are not enough as it come through the side, so I would thoughtfully recommend full safety goggles and a mask, it’s very easy to cut with a knife and I used a gun grade ( low expansion) foam adhesive from Selco, and that appears to have worked ok.
    The filters arrived early this week and couldn’t wait to make a start on piping them up.

    So the main gravity pipe work is now in, but not clipped, inc fitting for the bottom drain purge lines, and todays job is finish the last sheet of PU around a window frame, fit the mid water TGPR’s, and make a start on the pump pipe work.
    ibeabt to make a manifold, with ball and NRV’s so I can have the 3 variable flow pumps on timer, so I can boost the flow during the day and high season, and balance the flow to the returns, showers and veg pond, also have the facility to valve one off to feed the veg pond separately, as plan the is to use the 6x1M side veg pond, also as a quarantine /medication pond as I want to keep a couple of DB Stugeon

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  19. #52
    Heres a few few pics of the filter space, and the still wet slab for the side veg/quarantine pond.
    one regret already is not using double union ball valves on the main lines instead of the much cheaper Kockney koi ones, one must have got knocked and has split right through, lucky had a spare.

    Fibre glassing next week hopefully :@)


    D8669E6F-71DA-4C2F-B3F8-BB06C5BBB897.jpg09F184EE-A2CB-47EE-8833-878A4745908B.jpgB4A60D2D-16DF-45BA-88DB-0F043AEA445C.jpgCE124A39-2DCE-42DC-8ACB-2D46ADD7EA2C.jpg
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  21. #53
    Senior Member Rank = Supreme Champion freddyboy's Avatar
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    Looking good mate. Soon be there

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  22. #54
    Senior Member Rank = Grand Champion RoyLittle0's Avatar
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    Looking good, I think i need to get my finger out, I'm just at the blockwork stage
    4600 Gallon Concrete Block and Fiberglass
    2100 mm x 710 mm Infinity Window 32mm thick glass
    2 x Aerated Bottom Drains and Skimmer
    Filtreau HiFlow 30 Drum Filter
    Bio Chamber - 140 litres K1
    Bakki Shower - 30 KG Sakura Far Infrared Media
    2 x 18,000 lh pumps
    Heated from house boiler through a heat exchanger
    Idealseal MS290

    My Pond Build

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  24. #55
    Senior Member Rank = Grand Champion andikoi's Avatar
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    looking great,apart from th KK valves,if there anything like they used to be they will seize up and become inoperable,if your not going to be turning off and on all the time i would replace with slide valves,sometimes cheaper isnt the best policy especially with valves,also as said i would redo that clay pipe with plastic,andi

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  26. #56
    Looking good, looking forward to see its progression


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  28. #57
    Hi all,
    Fibre glassing is well underway, and would probably be finished if I hadn’t underestimated, but I did double check the total M2 and then buy a kit for the next size up, but in any case we are quite a bit short on mat and totally out of resin, probably ‘cos We are laying it on thicker than a pro would.
    The Guys worked through the night so it was quite annoying to then run out of material, It was a job I was looking forward to getting stuck into but had to go away on business, and it would have been daft to not take advantage of the settled weather.
    so 2 coats of 450 +tissue on the side and most of the bottom done.

    I have started to make up my 3x3 pump manifold with 2” pressure pipe, ball valves and NRV’s, and I am reluctant to make the final pump connections with hose, would anyone be able to advise if the typical thread on a decent sized pump is 2” BSP like this as I would like to fit a Union like this ....https://www.cdaquatics.co.uk/-pvc-im...ad-p-3819.html

    My Pumps are Jebao eco (1x30000, 2x 20000) all have the same threaded hosetail fitting, the male thread is about 2& 3/16” or 58mm in new money and 11 TPI, my Googling says it 2” BSP, but I’m not sure, and 6x 2” BSP Union come in at about £100 so I don’t want to get it wrong, you advise is much appreciated....also I’ve lost one end of the direct air kit for the bottom drain, any ideas where I have put it ? - somewhere ‘safe’ probably. ;@)
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  30. #58
    Senior Member Rank = Grand Champion RoyLittle0's Avatar
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    Making good progress
    4600 Gallon Concrete Block and Fiberglass
    2100 mm x 710 mm Infinity Window 32mm thick glass
    2 x Aerated Bottom Drains and Skimmer
    Filtreau HiFlow 30 Drum Filter
    Bio Chamber - 140 litres K1
    Bakki Shower - 30 KG Sakura Far Infrared Media
    2 x 18,000 lh pumps
    Heated from house boiler through a heat exchanger
    Idealseal MS290

    My Pond Build

  31. #59
    Fantastic weekend, hope yours also went well.
    pond fibre glassing is complete and sanded ready for top coat, and pipe work is almost complete, and only need a few more fittings to complete.
    For anyone having similar questions as I had my pump outlets were 2” BSP ( well at least 2 “ BSP fits.... its remaims to be see if it will leak)

    Sunday was topped by my 12 year old beating a British champion in continuous kick boxing match, and then beating an adult in a points fight...Go Hythe Dragons !!

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  33. #60
    Senior Member Rank = Grand Champion voodoo_15_uk's Avatar
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    You been making the dog a paddling pool?

    All looking very good. Bet it's been a struggle in the heat.

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