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  1. #41
    Senior Member Rank = Nanasai Gray's Avatar
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    Quote Originally Posted by Skoosh88 View Post
    I measured and it should about 5-10cm above the floor. Not sure where they pipe work was going to finish so was going to wait


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    As Liam said, Iíd get those uprights solvent welded in now because theyíll be a pig to fit after the pour and your concrete may just go higher than the elbows so best to get them in now and then youíre sorted.

    Thatís what I did on mine and once the base was down I adjusted the uprights to ensure they were plumb 90deg and then let the concrete go off.

    Iíd also suggest dumping some concrete under the pipe runs and also around the sides to keep them nice and level during the pour and cure.

    Also gives them some substance in case someone steps on them when floating the base out.

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  3. #42
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Quote Originally Posted by Gray View Post
    As Liam said, Iíd get those uprights solvent welded in now because theyíll be a pig to fit after the pour and your concrete may just go higher than the elbows so best to get them in now and then youíre sorted.

    Thatís what I did on mine and once the base was down I adjusted the uprights to ensure they were plumb 90deg and then let the concrete go off.

    Iíd also suggest dumping some concrete under the pipe runs and also around the sides to keep them nice and level during the pour and cure.

    Also gives them some substance in case someone steps on them when floating the base out.
    I see what you mean about standing in it but will have my builders arse if I find out he has damaged anything. Unfortunately too late now Iím off to work at 6am and concrete is being pour around midday


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  5. #43
    Senior Member Rank = Rokusai Handy Kenny's Avatar
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    [QUOTE=Skoosh88;277418]Has anyone put celotex on the floor of their pond?? I was planning on it until I just looked at an old thread and they only did the walls??

    If you are going to put celotex on the floor of the pond you will have to reduce the depth of your concrete or raise the height of your bottom drain. Raising the height of the bottom drain raises the height of the pipes which then doesn't have much concrete covering it unless you use say 1" Celotex. Probably the reason why some don't celotex the floor of their pond. However the deeper you go into the ground the warmer the ground is anyway which is why Ground Sourced Heating works. At 2m deep, there is a relatively stable 8-12oC temperature or so they say. The frost line ( the depth frost can get to) where I am in Scotland is 90cm and that is for something like a 100 year low, anywhere south of the border the frost line is higher.

    Kenny

  6. #44
    Senior Member Rank = Nanasai Gray's Avatar
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    Iím sure itíll be fine. It was just one of those ďjust in caseĒ ideas so itís not essential at all.

    Will be great to see the finished piece later!

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  8. #45
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    [QUOTE=Handy Kenny;277447]
    Quote Originally Posted by Skoosh88 View Post
    Has anyone put celotex on the floor of their pond?? I was planning on it until I just looked at an old thread and they only did the walls??

    If you are going to put celotex on the floor of the pond you will have to reduce the depth of your concrete or raise the height of your bottom drain. Raising the height of the bottom drain raises the height of the pipes which then doesn't have much concrete covering it unless you use say 1" Celotex. Probably the reason why some don't celotex the floor of their pond. However the deeper you go into the ground the warmer the ground is anyway which is why Ground Sourced Heating works. At 2m deep, there is a relatively stable 8-12oC temperature or so they say. The frost line ( the depth frost can get to) where I am in Scotland is 90cm and that is for something like a 100 year low, anywhere south of the border the frost line is higher.

    Kenny
    Ah bugger it then just the walls, any tricks on how to cut the wedge? My cutting arm is straight as a roundabout!

    Where abouts you from? Iím originally from Largs on the west coast moved down 7/8 years ago


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  9. #46
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Quote Originally Posted by Gray View Post
    Iím sure itíll be fine. It was just one of those ďjust in caseĒ ideas so itís not essential at all.

    Will be great to see the finished piece later!
    Yea I appreciate it mate, I have only got 2 3m lengths of 4Ē so didnít want to cut it then change my mind


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  11. #47
    If you put say 25mm celotex on the base just chamfer the perimeter down towards the drain with a craft knife, it doesnít have to be pretty as the fibreglass will cover it up, there should be enough adjustment in the stem of the diffuser to allow for the ďfinger thicknessĒ gap but check first obviously.
    Cut corner wedges with a bread knife or you can get a special saw (your builder may have one you can borrow, I wouldnít buy one especially)


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  13. #48
    Iíve got a couple of meters of 4Ē lying around if you get stuck but am away from Saturday for a week, can leave it accessible if you need it mate


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  15. #49
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Quote Originally Posted by bigcarpchaser View Post
    If you put say 25mm celotex on the base just chamfer the perimeter down towards the drain with a craft knife, it doesnít have to be pretty as the fibreglass will cover it up, there should be enough adjustment in the stem of the diffuser to allow for the ďfinger thicknessĒ gap but check first obviously.
    Cut corner wedges with a bread knife or you can get a special saw (your builder may have one you can borrow, I wouldnít buy one especially)


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    Iím might get a samurai sword and go full scale Japanese on it, does it matter if it ends up a bit wonky??


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  16. #50
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Quote Originally Posted by bigcarpchaser View Post
    Iíve got a couple of meters of 4Ē lying around if you get stuck but am away from Saturday for a week, can leave it accessible if you need it mate


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    Should be alright mate, if you leave your drum on a trailer I will take it away to er...make sure no one takes it...


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  18. #51
    Lol...
    Procedure for me went...
    Lay celotex
    Cut hole in approximate centre of drain and slice outwards toward inside edge.
    Cut round inside edge so you now have tour hole
    Lay knife at about 45 degrees and cut round edge
    Sand smooth (forgot about sanding out some imperfections, thatís where the dusty shit comes from)
    Worked for me.
    You also want a smooth rounded edge at the top where the glassing goes over the walls but under the coping. Basically no ďsharpĒ edges.
    If I can do it, anyone can. The hardest bit was doing the taped joints, I canít even wrap Christmas presents up without using those little pre cut bits of tape so using that metallic tape was a challenge. Only wasted half a roll before I got the knack.
    I wouldnít worry about it being perfect, itís going to be underwater and covered with algae so youíll never know.
    Bob said Iíd done a good job but Iím sure he was just being nice lol.
    Anyway, it looked pukka after heíd done his stuff.


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  20. #52
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Well the slab is done I think





    Itís not perfect, a little bit bumpy and he didnít quite get over the flange of the drain but close enough I reckon


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  22. #53
    Senior Member Rank = Nanasai Gray's Avatar
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    Todayís the day...

    Quote Originally Posted by Skoosh88 View Post
    Well the slab is done I think

    Itís not perfect, a little bit bumpy and he didnít quite get over the flange of the drain but close enough I reckon


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    Happy days! Looks good to me. My base and sides were rendered by me and I ainít no plasterer so they were a bit lumpy in places. After the fibreglass went on youíd never tell as it all seemed super smooth.

    Re the flange, better to be a bit lower than too high. My glasser took care of that on one side of my BD so I donít have a lip before the drain now.
    Last edited by Gray; 15-09-2018 at 12:52 AM.

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  24. #54
    Senior Member Rank = Grand Champion voodoo_15_uk's Avatar
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    I put celotex on the floor too.


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  26. #55
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Quote Originally Posted by voodoo_15_uk View Post
    I put celotex on the floor too.


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    Iím still in two minds... will wait and make a rash decision at the time

    What thickness did you go for?


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  28. #56
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Quote Originally Posted by bigcarpchaser View Post
    Lol...
    Procedure for me went...
    Lay celotex
    Cut hole in approximate centre of drain and slice outwards toward inside edge.
    Cut round inside edge so you now have tour hole
    Lay knife at about 45 degrees and cut round edge
    Sand smooth (forgot about sanding out some imperfections, thatís where the dusty shit comes from)
    Worked for me.
    You also want a smooth rounded edge at the top where the glassing goes over the walls but under the coping. Basically no ďsharpĒ edges.
    If I can do it, anyone can. The hardest bit was doing the taped joints, I canít even wrap Christmas presents up without using those little pre cut bits of tape so using that metallic tape was a challenge. Only wasted half a roll before I got the knack.
    I wouldnít worry about it being perfect, itís going to be underwater and covered with algae so youíll never know.
    Bob said Iíd done a good job but Iím sure he was just being nice lol.
    Anyway, it looked pukka after heíd done his stuff.


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    How did you round the edges of the celotex?


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  30. #57
    Senior Member Rank = Nanasai Skoosh88's Avatar
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    Concrete was ok to stand on when I came home from work so had a look under the pots to see how the BDís had coped, chipped away excess concrete and itís not too bad actually. The builder accidentally kicked the bucket over when pouring the concrete and a little bit has dropped inside but it scrapes off with a fingernail


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  32. #58
    Quote Originally Posted by Skoosh88 View Post
    How did you round the edges of the celotex?


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    Fine sanding block. You have to be a bit gentle with it else it will sort of chip off so nice and easy, donít rush it. A little gentle chamfer is all you need. 5mm or so.


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  34. #59
    Senior Member Rank = Rokusai Handy Kenny's Avatar
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    [QUOTE=Skoosh88;277461]
    Quote Originally Posted by Handy Kenny View Post

    Ah bugger it then just the walls, any tricks on how to cut the wedge? My cutting arm is straight as a roundabout!

    Where abouts you from? I’m originally from Largs on the west coast moved down 7/8 years ago


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    Skoosh,

    I thought your nom-de-plume was a bit Scots for an Englishman. Lived in Livingston since the 70's (that's before desktop PC's were invented).

    Kenny

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  36. #60
    Senior Member Rank = Rokusai Handy Kenny's Avatar
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    Right this is just the thoughts in my head. If anyone has any real idea then let me know.

    My Bottom Drain sits at 7.5 feet. The bottom of my pond is not flat (very roundy) and quickly rises parabolically to straight up. The deepest part is like a bowl and the BD sits in the middle of that and is actually set into the concrete so that the "flange" of the BD is actually around 1" below concrete level with the top (airy bit) of the BD just above concrete level. My pond is painted so there is no more height around the BD. I thought it was a good idea at the time and the muck certainly moves down the "hill" and into the BD. However I think that the air from the BD agitates incoming muck and sends (at least some of it) it skyward in the column of air/water.

    My thoughts are that if the BD flange was level with the bottom of the pond then the "sook" into the BD would be across the bottom of the pond (albeit that it isn't even flat) rather than interupted by a 1" shoulder of concrete around the whole of the BD which possibly dissipates the "draw".

    Not sure what the answer is (or if there is one) but I thought it was worth a mention when others on this thread have added celotex and chamfered it into the BD.

    Kenny
    Last edited by Handy Kenny; 14-09-2018 at 01:51 AM.

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