Wet plaster around shower tray

lesalanos

Having ongoing issues with the plaster around the shower tray.

From what I can ascertain the water is getting behind the silicone at the bottom of the tiles and then cannot get out at any other part until it reaches the plaster at the end.
It all appears dry underneath apart from these end points.  I replace the silicone but the issue still reappears.  Is there any way to stop this apart from frequently replacing the silicone.  There appears to be a large gap (6-8mm) on the long edge which I don't think helps.  Could there be any other places where the water is getting in?  
The gaps around the board are from where I took the board off today.

Thanks 

MovingForwards

@lesalanos can you take two photos, one showing the inside of each corner where the issues are?

lesalanos

It's difficult to get a good pic as at the moment it's still fillered from last time.  I was trying to get some possible solutions before I stripped it all off again.

To me it appears that water is getting behind the sealant at some point, flowing around the top of the shower tray until the end point where it hits the plaster.  I could put a big lump of sealant in the end but this would just trap the water there.

Mutton_Geoff

In my old house, I had this problem for years. I could not find the source until I ripped the shower out. The house builders had fitted the shower door before grouting the tiles which meant water found its way behind the door frame, into the tile gaps and down the wall. You only need the tiniest gap for water to get through.

Belenus

Has the inside bottom of the door frame where it sits on the shower tray been sealed?

If it has, that might be the problem.

The instructions for my not dissimilar shower door specifically instruct to seal on the outside only.

Leaving the inside unsealed allows water that gets into the door frame to run into the shower tray rather than finding its way outside.

lesalanos

Belenus said:

Has the inside bottom of the door frame where it sits on the shower tray been sealed?

If it has, that might be the problem.

The instructions for my not dissimilar shower door specifically instruct to seal on the outside only.

Leaving the inside unsealed allows water that gets into the door frame to run into the shower tray rather than finding its way outside.

That would make sense to leave a space there 👍
I'll take a look this week
Thank you