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View Full Version : Liner or Fiber glass render? (costs)



Grayham
29-04-2012, 10:10 AM
Hi,

Im new here and am in the process of planning my new pond. I have inherited a sunken concrete pond which I plan to use as a base and make the pond raised between 750mm to 1metre using concrete block. This will make it up to 2metres at its deepest and will end up roughly 20000 litres. As I am new to owning/building ponds myself. I am taking my time to work out what will be a combination of the best/cheapest/easiest way to go about things. I plan on installing a bottom drain for a start, but how to line it is troubling me. As its a bit of an odd shapes a box weld liner is out of the question. So I am torn between a liner and fiberglass render. As the final decisio may come down to cost, does anyone know a rough cost per m2 for a fiberglass render?

I will put some pics up when I get near a pc and I will be starting a build thread as soon as I get going.
I'm sure I will be back with more questions as I go along.
Thanks for reading

Grayham

keithatrax
29-04-2012, 10:43 AM
Hi,

Im new here and am in the process of planning my new pond. I have inherited a sunken concrete pond which I plan to use as a base and make the pond raised between 750mm to 1metre using concrete block. This will make it up to 2metres at its deepest and will end up roughly 20000 litres. As I am new to owning/building ponds myself. I am taking my time to work out what will be a combination of the best/cheapest/easiest way to go about things. I plan on installing a bottom drain for a start, but how to line it is troubling me. As its a bit of an odd shapes a box weld liner is out of the question. So I am torn between a liner and fiberglass render. As the final decisio may come down to cost, does anyone know a rough cost per m2 for a fiberglass render?

I will put some pics up when I get near a pc and I will be starting a build thread as soon as I get going.
I'm sure I will be back with more questions as I go along.
Thanks for reading

Grayham
hi and welcome yes we all like pics, cost per m2 for fiberglass is around £20, its worth looking at the pond builds on the forum may give u some ideas.
good luck with the pond & keep us all posted

Gazfish
29-04-2012, 11:28 AM
Hi Grayham,

I would say fiberglass as you get a great finish and its sometimes not as expensive as you may think so well worth looking into.

Were abouts are you ?

Welcome to the forum :)

Grayham
29-04-2012, 12:03 PM
Hi Grayham,

I would say fiberglass as you get a great finish and its sometimes not as expensive as you may think so well worth looking into.

Were abouts are you ?

Welcome to the forum :) Thanks for the quick replies. I am near Ely. About 12 miles north of Cambridge.
£20m2 is quite a bit more expensive than a liner. I presume that inclues the cost of labour for someone else to do it. I plan on doing all the build myself to keep costs down. If I went for the render would I be abl to use 100mm blocks as the render + fiberglass would be acting as reinforcement, thus saving the distilled blocks and rebar

DamianBethell
29-04-2012, 01:05 PM
hi i am only new to koi myself 2 years but i have built a fair few ponds if you use a liner you run the risk of ugly folds in the liner i personaly would go fiberglass thi is anywhere from £18 to £50 a square mtr but if that works out to expensive you could also think about glass fiber reinforced render and then coat it in the special pond paint green black or blue in colour choices choices choices all depends on how much money you have to spend all you have to remember is we are water keepers first and fish keepers second

Davej
29-04-2012, 10:08 PM
Hiya and welcome to the forum.

The lining to the pond is a pretty critical part, to get the best and most durable finish then there is no option but fibreglass.

But does all depends on circumstances and glassing is not a simple DIY job, at a glance it looks easy, but reality is rather different.

Cost does depends on the spec of the glass that is applied and in comparing prices its important to compare like with like, big difference between one layer of 600gsm and flowcoat against two layers of 450gsm, layer of tissue and flowcoat.

Dave

Grayham
30-04-2012, 08:50 AM
Hi,

Thanks for all your responses. Much to ponder.

I think I might get the walls built and get some quotes for rendering and glassing and take it from there.

I was hoping to be up and running by the end of summer, but things are a bit more expensive than I had envisaged. I think I might have to do things one stage at a time and aim for next spring.

It doesn't help looking at the build threads and seeing windows in ponds. It only adds to my ideas of grandeur and cost's.

As promised here are some photo's of the pond as it stands

This is what it was like when we moved in
http://www.extremekoi.co.uk/imgcache/1498.png (http://www.flickr.com/photos/34348363@N02/7127502029/)
191120111923 (http://www.flickr.com/photos/34348363@N02/7127502029/) by grayham.roper (http://www.flickr.com/people/34348363@N02/), on Flickr

And before the rain came
http://www.extremekoi.co.uk/imgcache/1499.png (http://www.flickr.com/photos/34348363@N02/6981416920/)
2012-04-07-204 (http://www.flickr.com/photos/34348363@N02/6981416920/) by grayham.roper (http://www.flickr.com/people/34348363@N02/), on Flickr

and now

http://www.extremekoi.co.uk/imgcache/1497.png (http://www.flickr.com/photos/34348363@N02/6981419778/)
2012-04-29-323 (http://www.flickr.com/photos/34348363@N02/6981419778/) by grayham.roper (http://www.flickr.com/people/34348363@N02/), on Flickr

This is what I plan for the wall
http://www.extremekoi.co.uk/imgcache/1500.png (http://www.flickr.com/photos/34348363@N02/7127503367/)
pond wall (http://www.flickr.com/photos/34348363@N02/7127503367/) by grayham.roper (http://www.flickr.com/people/34348363@N02/), on Flickr

And on of the small pond which will stay as a nature pond.
http://www.extremekoi.co.uk/imgcache/1501.png (http://www.flickr.com/photos/34348363@N02/7127504471/)
2012-04-29-328 (http://www.flickr.com/photos/34348363@N02/7127504471/) by grayham.roper (http://www.flickr.com/people/34348363@N02/), on Flickr

It does need a tidy up though

Gazfish
30-04-2012, 03:15 PM
Hi Graham,

Yes building a koi pond is not cheap and then keeping them isn't cheap either :)

Are there any filters on this pond ?

I would say looking at the shape of the new pond you would be best going for fiberglass even if it means waiting as otherwise you will have creases in the liner which can be a pain.

What will the rough dimensions of the new build be ?

Grayham
30-04-2012, 03:36 PM
http://www.extremekoi.co.uk/imgcache/1502.png (http://www.flickr.com/photos/34348363@N02/6982321768/)
Pond Dims (http://www.flickr.com/photos/34348363@N02/6982321768/) by grayham.roper (http://www.flickr.com/people/34348363@N02/), on Flickr

I will be going 3 or 4 courses high with the block work. I'll decide that when building.

There are no filters. It was pretty much a bog when we moved in.

It is just a large concrete hole in the ground. I will have to run cable roughly 30meters to get electricity for the kit.

Luckily its 4" thick reinforced concrete. Which I'm not looking forward to cutting into and tunnelling under to install the bottom drain.

Would a render with added fibreglass and then sealant be sufficient?

Corgi.kid
30-04-2012, 04:06 PM
That is going to look great when you finish it. I would of used a good quality liner personally and a bottom drain. Good luck on the project with whatever method you choose. :)

Gazfish
30-04-2012, 08:07 PM
Hi Graham,

Would a render with added fiberglass and then sealant be sufficient?

Normally you would render over the block work and then glass onto that and no other sealant is needed.

Koipondconstruction
01-05-2012, 08:39 AM
The fibreglass fibres are added to the render to give it added strength and reduces any cracking of the render, maybe getting a bit confused but as Gaz says, once this render coat is dry you would glass over the render with 2 layers of 450gsm matting and then flowcoat, or you can paint it with pond paint but make sure no pinhole areas in the render or it could leak if paint dont seal it properly.

Grayham
04-05-2012, 08:03 AM
Thanks everyone your input. I think fiberglass is the way to go. I will build up the walls and get some quotes for the work and take it from there. Now all I need to do is decide whether to build the walls straight or follow the curves of the current shape & decide on filtration. I'm thinking sieve & bead filter.
Grayham

Gazfish
04-05-2012, 02:27 PM
Hi Graham,

How deep is the pond going to be ad are you keeping the slopes ?

Grayham
04-05-2012, 04:56 PM
Yes I plan on keeping the slopes.

The current pond is sound, so I see no point in taking it up. The only thing I will be doing is cutting a hole in it to install the bottom drain. I hope the shape will help flow around the pond.

I think I will build the walls 1 metre high. So it will be roughly 2 metres at it's deepest and over 1metre at the shallow end.

Grayham
05-09-2015, 02:49 PM
Holy thread resurrection Batman!!

I'd love to be able to report that my plan's came to fruition. As is often the case, the need to spend money in other areas of the house and lack of time got in the way.

The pond ended up a smelly green pool until I finally had enough last weekend and drained it down.

The structure of the pond is still sound and shows no sign of leaks. So over the coming weeks I'm going to jet wash the inside to clean it and paint with rubberised pond pain. Dig a 4inch strip around the pond and fill with gravel to stop surface water entering the pond. And add some kind of capping.

I was also considering partitioning the pointy end off and using it as a kind of skimmer and covering it over.

I've got a pump and multi bay filter on order. So even though it wont be as grand as I had hoped, hopefully I should soon have a pond suitable for fish to live in.