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Stopping Condensation on Toilet Tank After Bathroom Refit

Postby sam.clamp28 » Mon Jan 07, 2019 6:42 pm


This is my first time posting but was hoping someone may be able to offer some advice.

I've recently had my bathroom done, since its finished there is a constant build up of condensation on the toilet tank and its beginning to pool on the floor. I've tried obvious things like leaving the extractor fan on and doors open for ventilation, but even with these its dripping wet within a couple of hours.

My plumber has revisited to check there aren't any leaks (which there isn't) and he has suggested a couple of things.

Insulating the inside of the tank or going for a full cavity wall insulation as he noticed we didn't have any and there are government grants available online.

if anyone could offer any help it would be appreciated

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Simply Build It

Postby thedoctor » Mon Jan 07, 2019 10:20 pm


One of the best and most effective methods that we have found is to indeed insulate the inside of the cistern/tank as your plumber has suggested.

Unfortunately this does involve a little work and also means removing teh cistern while the work is carried out which isn't always ideal, but in the long run, it's worth the hassle as in all the instances we have tried it, it has resolved the issue.

We do have a full tutorial project on how to do this that can be found here (along with a few other ideas also): ... sterns.htm

Hope this helps

Kind Regards
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