Loft conversion leaking shower

[Verbena37]

We had a loft conversion done and finished just over a year ago, by a very well known and liked loft ocnversion company. The job spec said they would fit our supplied sanitary ware in the new loft ensuite and their workmanship would last ten years and include fixing to replacing anything that was down to workmanship.

Yesterday, after DH and then I had our showers, my DS shouted (directly after my shower) there was water leaking through the ceiling, via the light fitting. It was a constant pouring drips over about half an hour into the study below.

Before I call them,chill they try and blame the shower tray and what is the most likely way in which they will fix it? Lift shower tray or go up through study ceiling etc? . Thought having workmen in the house was finished for a while!

Oh and under the shower tray, they laid ply board I think....surely that will be soaked and rotting?

Ply is actually not bad, it is five hundred times better than chipboard.

When you have a leak like that, it is best to poke several holes through the ceiling below with a skewer so the water can drain quickly. Lift any floor coverings that you can so that the floor can dry. You can claim on your household insurance for damage caused by EOW but not for repairing the leak itself.

Unless you have a shower pump, I will guess that the waste pipe or trap has come apart. The more common leak, caused by tiles or cubicle not being sealed to the shower tray, would probably not leak so much. If the water is completely soap-free, it might be from the spray pipe.

If you ever need a new shower tray, consider one with concealed legs and removable side panels so you can get underneath it.

It will be useful to photograph or film the damage and the cause, when exposed, in case of future argument with the installer. The plumber will not want to be photographed, and there is no need.

Hmm, lots to think about the pigletjohn and I'm thinking stress-provoking.
Thanks for the info.
We do have a shower tray on legs downstairs on the first floor....and yes, that's been helpful if we have needed to get in but the loft one had to be an almost ground level tray due to ceiling height.

When we had water coming through the ceiling (on New Year's Eve) it was as Pigletjohn said the waste water pipe had come away from the plug hole fittings. I managed to mend it through the plug hole as we tried to get under the shower tray but failed as the previous owners had left no way to get to it. I bought a new connector and plug fitting and screwed it to the old waste pipe all through the plug hole.

Yeah that happened with my bath - waste pipe has been badly fitted and it worked its way loose so I had to reattach it and seal with new sealant. I had to chip tiles away to get to it... You may have to take the shower tray out to fix it.... Hopefully your builders will come quick, fix it and make good on any damage!

Ok, thanks everyone. That sounds the most likely then. Will speak to DH because I'm clueless about DIY and having project managed the whole loft conversion and house extension, I'm pretty done in with it all !