Methane smell in newly refurb bathroom, piglet John??

[looby11]

My heart feels broken. We waited patiently 5 long years to do up a horrible 70s bathroom and although it looks stunning now as it’s all finished I can’t bear to go in as there is an overwhelming stench of sewer and methane. After the first day of work ( first fix) we noticed this smell but they said they hadn’t covered the pipes up and left us with that smell over the weekend. They mentioned p traps and it all made sense. Anyway they covered the exposed pipes and the smell was not noticeable so far so good. Now they have just completed and the builder handed us the bill yesterday. However all day today the smell has been overbearing and I’m so sad. They said once water was added to the toilets and shower it would stop the smell but it’s not seemed to work. Everything has been caulked up and there are no “gaps” other than the fan inlet.

What is our position ? What do we do. Please tell me it’s easily remedied and doesn’t involve ripping up the newly tiled floor?
The plumber did access under the floor via another room to check.

Also extra info so as not to drop feed is that the toilet position was changed and a bidet removed. And we can’t we can’t see where the waste pipe for the bathroom opens out to. So there is def no p trap that goes up out towards the roof.


Sorry if It’s long and rambling and a bit comfusing

[FeeFee832]

www.mrplumberatlanta.com/help-guides/why-does-my-drain-smell-like-rotten-eggs/

[Lightsabre]

Could you get a drainage company that does cctv out to run one down the shower fully?

[Lightsabre]

Gully not fully!

[PigletJohn]

pour a jug of water into the shower to fill the trap; don't run the basin or flush the WC for an hour (the water flow from other drains may be sucking the trap dry).

Does this stop it smelling?

[FeeFee832]

Did you pour water in?!