Fixing a bath to a wall

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rfisher

Original Poster:

5,024 posts

284 months

Friday 17th April 2009
quotequote all
Got a leak behind the bath which has a shower and glass screen.

I've had several goes at re-sealing around the bath with various silicon sealants.

Today I got a bit carried away and took the whole lot out, shower screen, bath and half the tiles.

The bath was fixed to the wall with 2 brackets which I've fubared as I couldn't reach under the bath to unscrew them from the bath.

I'm planning to PVA seal all walls and the floor, re-tile with a layer below the bath around the shower area and refix the bath.

So - what's the easiest way to secure the bath along the wall? I quite fancy screwing 2x4 batons at either side where there's just about enough room to reach the back wall. Then cross bolting with more 2x4.

Anyone any better suggestions?

magpie215

4,435 posts

190 months

Friday 17th April 2009
quotequote all
have heard silicone sealer is being used quite a lot now to secure bathroom furniture in position??

Simpo Two

85,760 posts

266 months

Saturday 18th April 2009
quotequote all
I fixed full-length battens along the walls and put screws up from underneath (the bath had a wooden frame set into the fibreglass). The weight is then shared between the battens and the supporting frame under the bath.

Remember to half-fill the bath with water before sealing, just to take up any sag.

northwest monkey

6,370 posts

190 months

Saturday 18th April 2009
quotequote all
rfisher said:
Got a leak behind the bath which has a shower and glass screen.

I've had several goes at re-sealing around the bath with various silicon sealants.

Today I got a bit carried away and took the whole lot out, shower screen, bath and half the tiles.

The bath was fixed to the wall with 2 brackets which I've fubared as I couldn't reach under the bath to unscrew them from the bath.

I'm planning to PVA seal all walls and the floor, re-tile with a layer below the bath around the shower area and refix the bath.

So - what's the easiest way to secure the bath along the wall? I quite fancy screwing 2x4 batons at either side where there's just about enough room to reach the back wall. Then cross bolting with more 2x4.

Anyone any better suggestions?
Apart from the PVA, and the timber probably being too large (2" x 2" will do you fine unless it's a mega bath) you're pretty much there.

Build your frame along the back walls then fix your bath to the frame. Half fill the bath then seal any gaps - don't worry about being too neat. Fit some trim which fits under the tiles but leaves a seal on show - this is rather than silicone being on show. You can silicone under this if you like for extra sealing. Before tiling, consider 'tanking' - a bath kit will cost approx £50 from a plumbers merchants (i.e not B&Q). Once its all gone off, tile away using proper adhesive & a separate grout (i.e not B&Q). I can post some pics if you like if it doesn't make sense.

Jobs a good 'un;)

Ferg

15,242 posts

258 months

Saturday 18th April 2009
quotequote all
Battens are good, but I've always favoured the following technique:

Level the bath accurately.
Lower the feet furthest from the wall about 5-10mm.
Push the bath hard against the wall.
Fix both feet nearest to the wall with screws (yes, they are difficult to get to).
Jack the previously lowered feet up to level the bath and fix to floor.

This 'nips' the bath tight against the wall.

Then adjust centre leg if it has one and screw wall brackets..
Tiling should sit on the bath rim and as said, fill the bath half full before silicone sealing.

Never let me down!

R5GTTGAZ

7,897 posts

221 months

Saturday 18th April 2009
quotequote all
And fill the bath 3/4 before sealing otherwise when you get in, it will sink. and all your work will go down the toilet.

rfisher

Original Poster:

5,024 posts

284 months

Saturday 18th April 2009
quotequote all
Thanks for all the info. - very helpful.

Hadn't thought about tanking but I quite fancy never having to do this again so it's probably worth doing.

I was planning to tile below the level of the bath so that I could then silicone seal between the bath and tile surfaces. Most of the water leak before was at the silicone to plasterboard junction.

Can you tile below a bath and seal to it or will movement just pull the tiles off? I'd always assumed that builders didn't bother tiling below a bath as it was easier to fix the bath to the wall and then tile the wall up from the bath.

Simpo Two

85,760 posts

266 months

Saturday 18th April 2009
quotequote all
rfisher said:
Most of the water leak before was at the silicone to plasterboard junction.
There shouldn't be a 'silicone/plasterboard' junction - the waterproof seal is between bath and lower edge of tiles.

rfisher

Original Poster:

5,024 posts

284 months

Saturday 18th April 2009
quotequote all
The seal was to the edge of the tiles but the gap was quite large and SWMBO likes a bit of hard scrubbing when mould appears. That eventually caused a break in the seal in several places.

That's why I want to tile below the bath so I can make the gap smaller and increase the tile to seal contact area.

Ferg

15,242 posts

258 months

Saturday 18th April 2009
quotequote all
rfisher said:
That's why I want to tile below the bath so I can make the gap smaller and increase the tile to seal contact area.
Don't.
The chances of a tiled flat wall to push the bath against is remote. Make sure the tiles sit on the bath rim to minimise the seal.

mxi933

467 posts

209 months

Saturday 18th April 2009
quotequote all
Word of advice - dont PVA under tiles. If any moisture at all gets under the tiles it will reactivate the PVA and the tiles will quite simply drop off the wall.

Just thought I'd mention it smile

Simpo Two

85,760 posts

266 months

Saturday 18th April 2009
quotequote all
rfisher said:
The seal was to the edge of the tiles but the gap was quite large and SWMBO likes a bit of hard scrubbing when mould appears. That eventually caused a break in the seal in several places
The thing to do then was to scrape/cut out the old sealant and renew. You can also get mould-repellent sealant, which may help.

rfisher

Original Poster:

5,024 posts

284 months

Saturday 18th April 2009
quotequote all
Oooooooo I'm getting all confused now.

Tiling below bath - bad idea as it won't be flat.

Water-proofing using PVA - bad as the tiles may fall off if damp gets under them (anyone confirm this?).

Tanking using a water-proofing paste - good but will need to skim the plasterboard to allow room for the layer.

Anything else to consider?

Ferg

15,242 posts

258 months

Saturday 18th April 2009
quotequote all
rfisher said:
Tiling below bath - bad idea as it won't be flat.?
It's also important to lose the curved edge of the bath under the tile to make the seal as small as possible, if you see what I mean.

rfisher said:
Water-proofing using PVA - bad as the tiles may fall off if damp gets under them (anyone confirm this?).
I've never heard of PVA softening with damp once it's gone off.

pies

13,116 posts

257 months

Saturday 18th April 2009
quotequote all
rfisher said:
Oooooooo I'm getting all confused now.

Tiling below bath - bad idea as it won't be flat.

Water-proofing using PVA - bad as the tiles may fall off if damp gets under them (anyone confirm this?).

Tanking using a water-proofing paste - good but will need to skim the plasterboard to allow room for the layer.

Anything else to consider?
What sort of flooring have you got ? are they floorboards or just sheet.If its floorboards best put a battons across the boards to help prevent movement smile

annodomini2

6,874 posts

252 months

Sunday 19th April 2009
quotequote all
R5GTTGAZ said:
And fill the bath 3/4 before sealing otherwise when you get in, it will sink. and all your work will go down the toilet.
Also get all the existing sealant off beforehand, clean the surfaces with white spirit and ensure the area being sealed is dry.

Otherwise it will seperate.