despite resealing upstairs ceramic tray twice water continues to run down downstairs wall when shower is used

Hi Terry I have just rescued someone on here from this issue and the job went as so Pulled out shower tray and blown tiles to discover leaking pipes had damaged floor area. re lined floor and stud wall with marine ply Sorted pipe work retiled areas affected resealed with mastic. You may have a leak on waste somewhere or the water is breaching the tiles and grout. Test waste pipe by pouring water carfully down shower waste this tests pipe work and waste seal. then spray walls with shower hose to see if leak persists. thanks Concept building services

have you investigated waste seal or pipework to shower, or quite possible a fracture in grout is allowing water penetration hope this helps

this sounds like your trap may have a leak under the tray or the pipework feeding the shower.

sounds like seal problem between shower tray or possibly movement of tray due to not being supported properly regards colin

More than likely the grout needs renewing....

Hi There may be a problem with your waste pipe or water could be getting past the tiles. Hope this was helpfull to you. Kind Regards James Coburn JWC Property Services

Are you able to check your shower waste before removing all the tray and tiling. Depending on the type, lift off the chrome cap, un lock the hair trap inside and lift out. replace the chrome cap and use the notches in the end of the hair trap insert to tighten the chrome cap. This may only be possible if you have a shower bottle trap. If you have a u bend or other style trap you can't do this. It,s worth a try, sometimes the traps can loosen if fitted incorrectly or the seal is loose.