45mm Shower Tray on Concrete

[macdadi112]

Hi,

I'm installing a 45 mm shower tray to go onto a concrete floor.

Well to bring it down towards the ground I've managed to remove the concrete below to the earth level which is about 50mm.

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• macdadi112
• 16 May 2013
• 1

Can I put the shower tray on there or do I need another concrete mix (how much cement with sand)?? Or could I place a wooden frame on it?

Thanks

Macdadi112

 

[Hugh Jaleak]

Where's the damp course?

 

[macdadi112]

Its One/two bricks on top of the floor level.

 

[diyplumber1980]

What about the waste pipe? where does that run? if you've gone 50mm below ground level, how/where will the waste water go?

 

[macdadi112]

That's a good question.

Well I am hoping to run it to the outside. Probably best if I give you a thorough idea of what I'm doing.

The shower tray is being installed in a corner, the basin is being installed on a wall with its waste being chased into the ground.

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• macdadi112
• 17 May 2013
• 1

I managed to dig up the concrete (about 50mm) where the shower will lie.

1) what should I put the resin based tray will it be best to lie on because I will have to bring it up by 20mm. Is it another concrete mix (how much cement with sand)?? Or could I place a wooden frame on it?

The waste is to go outside (below the damp proof course), I think its best explained by the picture:

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• macdadi112
• 17 May 2013
• 1

This is all to be captured by a waste pipe outside.. I hope
2) What do you guys suggest??

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• macdadi112
• 17 May 2013
• 1

 

[ivixor]

You really shouldn't break your floor slab! You will get all sorts of damp problems, not to mention that the base of your shower tray will be BELOW the level of the gully outside! Meaning the drains will not work.

What you really should have done is place the base on a raised platform on top of the concrete slab, and then the waste can exit at floor level.

You also seem to be trying very hard to block your gully with rubble...

 

[macdadi112]

Remember the floor shower is supposed to 45mm high, so by going down 50mm, I will need to raise it up by 5-10mm. So you think its best to concrete it back up again by 10mm.

Please also note that the gulley is much lower than the pictures really show. To put it into perspective it falls 75mm below the floor base

 

[Hugh Jaleak]

There should be some form of damp membrane under the concrete, it appears you've broken through the concrete and hit soil, no mention of a membrane under the concrete? I would be seriously concerned about going any further until the floor has been sorted out, if necessary all the concrete would need to come out, blind the base with sand, lay a membrane down and reconcrete the floor.

Otherwise you could be heading for problems with mouldy/damp floorcoverings.....