under floor heating leak

ChrisJ · 2006-06-16T17:51:57+00:00

Oh dear!The pipes went down and were tested as not leaking.The screed went down dry and no leaks showed up.The floorsheets went down and then the ply and ceramic tiles.And then the plumber came to connect the manifold to the boiler.and we discovered we have a leak somewhere under the floor which wasn't there when the screed went down.Aaaaaargh!The conservatory floor is downstairs and is a suspended wooden floor with kingspan between the joists supported by slats between the joists with the pipes and screed laid on top of that but between the joists. The floor sheets rest on the joists and have been screwed in.The ply has been screwed to the floor sheets. The tiler asked how thick the floor sheets were to ensure that the screws he used didn't go right through.The only access to the under floor void is through the air bricks.Is there any way we can :a) plug the hole in the pipe without disturbing the tiles? Radweld springs to mind but I have a feeling it might break the boiler. I'm assuming that theb) if a) is not possible can we find out where the pipe is leaking without ripping up the whole floor (is there some detector that works through the tiles (eg by measuring microwave absorbtion or something). Is it possible to remove just a portion of the tiled floor without disturbing the surrounding tiles??Any suggesstions welcome as we really don't want to start all over again!DespontantlyChris J

Jun 16, 2006 22 Replies

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Pete C 20 years ago

Good stuff. What caused the leak?

cheers, Pete.

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Ed Sirett 20 years ago

See the SealedCH FAQ. I'm concerned that the

1) The leak is too big. A 30 minute drop would be drip-drip-drip as you read it out but not dribbling. 2) The leak sealer will only work where the water evaporates leaving the sealer behind.

I'd be tempted to keep the pressure on it and try to see if you can find out where the leak is. Perhaps by looking in through the air brick.

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Grimly Curmudgeon 20 years ago

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember ChrisJ saying something like:

Why on earth not? This isn't Blue Peter with its daft blacked-out trade names, you know.

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