How best to get the water from this wall into a hopper/drain?

[StephenStephen]

This is the corner of our kitchen.

The wall itself is underground and damp, but we're currently focusing on what to do with the 2 trickles of water coming out of the wall in the corner at the bottom.

We're thinking to collect it and put in a drain to take it out of the room - how best to collect it out of the wall?

Do we take out a section on the left wall, put in a cement sloping section to drain into a hopper/drain, then do the same on the right hand wall?

Would we put some kind of waterproof additive in the cement?

We dug the hole down deep, in the hope that we might get through clay to a more free draining layer - unfortunately we just hit another layer of clay, we're down about 3 foot and the hole is slowly refilling.

We have a kitchen fitter lined up, so appreciate any thoughts please...

Many thanks, Stephen

 

[Deluks]

Ideally, you'll need to tank the room. Best tell the kitchen fitter to hold fire.

The way to deal with it is to dig a sump with a pump, this collects the water and pumps it outside or into a drain. But you'll have to use a waterproofing membrane to keep the moisture out of the living space.

How far underground is it? Can you remove the ground outside level with the internal floor?

 

[StephenStephen]

Thanks for the info, yes - I'm slightly reluctantly admitting to myself that tanking of some kind will be needed on the walls.

There's no possibility of removing the ground outside - it is completely underground with a kitchen above which extends out further into the hillside.

My initial thought was a sump pump, and then the kitchen fitter, and my partner, and the wise lad who's preparing the room for the kitchen fitter are all suggesting that collecting into a hopper and running it out is the way to go...

 

[StephenStephen]

So, after lots more thought, headscratching and strong discussion! We're thinking we're going to go with Kontract membrane on the wall behind a studwall, and in the corner where there is running water coming out of the wall, to direct it into a hopper and pipe it out (luckily there is this random channel in the floor already)

We still have the original question of how to get the water out of the wall in the corner into a hopper. It runs out of the wall where it hits the clayline at the base of the wall.
We're thinking to dig out the clay underneath, replace with cement, sloping down into the hopper - maybe with a lead layer on the sloping cement - Does that sound sensible? Is there an easier way to do it?

We decided not to go with a sump pump - it would be behind and below kitchen units in the corner, impossible to service, repair or replace, and we have a channel to take water out anyway,

Thanks for your thoughts, Stephen

 

[robinbanks]

A French drain?

 

[Notch7]

So, after lots more thought, headscratching and strong discussion! We're thinking we're going to go with Kontract membrane on the wall behind a studwall

Yeah something like Kontract or Oldroyd membrane is the way forward

Im a bit confused about your point regarding getting rid of the water, because if the room is below ground there is nowhere to direct the water without pumping it upwards - unless you mean you want to direct to the other side of the house where the ground level is lower

We're thinking to dig out the clay underneath, replace with cement, sloping down into the hopper - maybe with a lead layer on the sloping cement - Does that sound sensible? Is there an easier way to do it

 

[StephenStephen]

Yeah something like Kontract or Oldroyd membrane is the way forward

Im a bit confused about your point regarding getting rid of the water, because if the room is below ground there is nowhere to direct the water without pumping it upwards - unless you mean you want to direct to the other side of the house where the ground level is lower

Yes, the ground slopes, so we can channel it out of the lower corner of the room...

 

[StephenStephen]

A French drain?

Where?

 

[Deluks]

Like in the video I posted, he mentions a 'passive system' no pump needed as gravity will take care of it, with channels and drainage underneath.
You will still need to tank, expecting all that moisture to happily make it's own way out without permeating into the room and making the back of your cupboards mouldy is wishful thinking.

You also need to think about maintenance of your drainage solution. If it silts up then you don't want to have to tear up the membrane to get to it.
Ideally use the biggest pipe you can get away with, running as straight as possible and accessable for cleaning/rodding from the outside.

Or fit some kind of access through the floor.

 

[robinbanks]

Where?

The route along which you need to transport the water..

 

[StephenStephen]

The route along which you need to transport the water..

It's inside the kitchen so I'll use a pipe or aqua channel to reduce evaporation.