Cracked concrete pond

I used a bitumen based sealant. Warmed it up to make it more liquid and
chose a hot sunny day so that the concrete was warm. Brushed as much
dust from the gap as possible and allowed the sealant to run down the
cracks. I then spread the sealant away from the cracks to make a T shape
over them (the downstick of the T is down the crack).

Allow the sealant to cure for a couple of days, then cover with pond paint,
preferably over the whole pond and a couple of coats. No sign of a leak
in a couple of years now. Make sure that neither the sealant nor the paint
has any kind of bactericide or algicide included or it will poison the pond.

You might like to make sure that the reason for the cracks has gone away
for good though or the stresses may return to create new cracks. In my
case it was a large tree root that had grown directly under the middle of
the
pond.

Good luck.

"Bernard Huckstep" wrote in message
...
Hi

I have a small pond (7' x 5' x1') with deep cracks in it. Pond water
gradually drains through the cracks. Does anybody know how to repair these
cracks and make the pond waterproof again?

Thanks in advance

Bonod

"Bernard Huckstep" wrote:

Hello Bernard

BH I have a small pond (7' x 5' x1') with deep cracks in it.
BH Pond water gradually drains through the cracks. Does anybody
BH know how to repair these cracks and make the pond waterproof
BH again?

Drain and dry the area.

Apply PVA (mixed 4-1 water/pva), let it dry.

Patch with 3-1 sand/cement with PVA added.

Couple of coats of pva over the top when it's dried.

If they're hairline cracks, use bitumastic emulsion or any other
rubbery sealant that's good for concrete.

Of course, this won't last very long. The big problem is whatever's
caused those cracks to appear, probably soil being washed out from the
footings. Could also be due to ice, bad concreting, insufficient
concrete, lack of proper reinforcement.

Guess you've learned the main drawback of concrete ponds. I use
concrete a fair bit, but I also line with butyl first. The only real
solution is to rip the whole thing out and re-do it.

--
Simon Avery, Dartmoor, UK Ý http://www.digdilem.org/

I have a small pond (7' x 5' x1') with deep cracks in it. Pond water
gradually drains through the cracks. Does anybody know how to repair these
cracks and make the pond waterproof again?

The very best and easiest way is to lay a liner on top of it Jerri

http://www.fringeweb.com/Ponds/JerrisPond

Someone just posted this link which could be your solution...

http://www.justliners.com/foamseal.htm

"Bernard Huckstep" wrote in message
...
Hi

I have a small pond (7' x 5' x1') with deep cracks in it. Pond water
gradually drains through the cracks. Does anybody know how to repair these
cracks and make the pond waterproof again?

Thanks in advance

Bonod