Hardibacker Tanking Question

[gooty]

the bath has a 18mm ply covered in 6mm hardibacker behind the taps, concrete rendered wall/window by one of its long sides and a shower screen along the other.

as the shower will be spraying away from the hardibacker wall, is there any point in tanking?

 

[White Room]

I would just to isolate the ply, hardie is water resistant but not waterproof...also a person/persons will be standing in the bath to shower and water will bounce off the body onto the wall areas.

 

[MW Smith Ceramics]

Is this just a bathroom with a standard shower, I wouldn't tank it, I only tank in walk in showers really unless a client/ builder specifies this then I'll do it.........if your using Hardi backer boards, mastic sealing everywhere before and after tiling and allowing all material to cure for at least a week what's the need to tank??......

 

[MW Smith Ceramics]

You could install some wedi board to the rendered window wall before tiling if your really concerned.......is this the wall your concerned about??

 

[One Day]

Is this just a bathroom with a standard shower, I wouldn't tank it, I only tank in walk in showers really unless a client/ builder specifies this then I'll do it.........if your using Hardi backer boards, mastic sealing everywhere before and after tiling and allowing all material to cure for at least a week what's the need to tank??......

Hardibacker isn't waterproof! If it gets wet (depending on shower usage and tiling etc) then it transfers water to the ply it's fastened to. Then all hell can break loose.

Cement boards have NO place in wet areas when there are products like Wedi and Kerdi out there.

 

[MW Smith Ceramics]

Hi Impish.......

Do you tank, wedi or Kerdi every shower area you tile then mate?.....

 

[jobdone]

Belt and braces on all jobs. All wet areas get tanked, have removed to many bathrooms tiled walls that look fine but have water ingress why risk it for and extra hours work most customers will pay for the tanking when all is explained.

 

[MW Smith Ceramics]

I have tiled onto many backer boards over many years in bathrooms and never had a come back...........

 

[jobdone]

No problems with hardie backer boards but it was tanking the other walls I would tank that as well especially as it is on to ply

 

[MW Smith Ceramics]

I do use wedi also, just prepared a bathroom in wedi before tiling as client insisted, so am I the only fixer that's done this then......am I on my own here ?.......I've done many hotels - travelodges , premier inns where we have tiles directly onto plasterboard in the shower areas with no tanking or mastic sealing prior to fixing, now that's asking for trouble I admit but all us lads were doing the same in all rooms for years.............this was the prep spec before tilin

 

[p4ulo]

Tank all the walls above a bath mate, easy and complete piece of mind.....

 

[MW Smith Ceramics]

We weren't gonna start phoning the boss refusing to tile we would have been without my wages!!.....DOH!!!!

 

[MW Smith Ceramics]

Yes I think what your saying is the right thing to do to be totally sure of waterproofing there buddy......I have tanked many bathrooms but also not tanked many with no probs.......what about all the contract jobs you must have done tiling shower rooms directly onto plaster over the years when tanking wasn't specified by builders......done it for many tiling contractors with no problems........but I agree tanking defo the way to go - ( better to be safe than sorry )

 

[p4ulo]

what about all the contract jobs you must have done tiling shower rooms directly onto plaster over the years when tanking wasn't specified by builders......

Never done any that I haven't tanked.....I've had to fix several jobs where tbh it wasn't failure due to tanking ( flexing shower tray, cracked grout, missing sealant) so I always insist on it and get it paid for every time.....That being said, I'm not a big trader so never work on new-builds / for builders....!

 

[MW Smith Ceramics]

Fair play to you Paulo, totally see what your saying.......I may start following your methods on more bathrooms.....if client is happy to pay for it.......good advice bud

 

[gooty]

thanksfor your replies.

didnt want to tank due to possibility of weight issues once i decide on the tiles, plus the cost as most tanking kits seem to be not large enough to cover the area.

is everbuild aqueseal any good. its only £43 for 7.5m2?

 

[One Day]

Hi Impish.......

Do you tank, wedi or Kerdi every shower area you tile then mate?.....

I do mate. it's all domestic work and normally top end stuff so the cost is easily lost. if you've not already guessed, I've a personal hatred of cement board. Particularly hb. Mainly after ripping out plenty of stinking wet mouldy wet rooms all with hb which hadn't broken down but had allowed water to do it's thing to everything that wasn't hb.

 

[Flintstone]

Tanking kits are about £50 and cover enough to do a shower enclosure or above a bath. So maybe £100 supplied and fitted? I have tiled for years with only tanking wet rooms, but these days i do suggest tanking to customers and explain it all to them, then they have the choice. Depends on the job, if it's a cheap bottom end job, there probably not gonna go for it but any job to a decent standard people tend to go for it. Trying to convince a builder to go with it is a different story!

 

[MW Smith Ceramics]

Fair comment mate, totally see where your coming from if you,ve had those past experiences ....so for all bath walls with a shower/ wet rooms what are you using mostly for waterproofing and what are paying for it?......

 

[Flintstone]

I do mate. it's all domestic work and normally top end stuff so the cost is easily lost. if you've not already guessed, I've a personal hatred of cement board. Particularly hb. Mainly after ripping out plenty of stinking wet mouldy wet rooms all with hb which hadn't broken down but had allowed water to do it's thing to everything that wasn't hb.

What do you class as the ideal product to board the walls in a shower area, and the floor

 

[MW Smith Ceramics]

Tanking kits are about £50 and cover enough to do a shower enclosure or above a bath. So maybe £100 supplied and fitted? I have tiled for years with only tanking wet rooms, but these days i do suggest tanking to customers and explain it all to them, then they have the choice. Depends on the job, if it's a cheap bottom end job, there probably not gonna go for it but any job to a decent standard people tend to go for it. Trying to convince a builder to go with it is a different story!

hahaha!......yeah they look at you gone out!!!!

 

[One Day]

What do you class as the ideal product to board the walls in a shower area, and the floor

for me, it's kerdi or wedi. Lightweight, easy to cut and waterproof once joints are sealed. I don't like kerdi on floors though. Wedi doesn't compress as easily.

 

[MW Smith Ceramics]

What do you class as the ideal product to board the walls in a shower area, and the floor

Well I would say wedi board all day for walls otherwise I'll be in more trouble with impish!........Hardi or wedi for the floor depending what the floor substrate is and if there is UFH

 

[White Room]

Well I would say wedi board all day for walls otherwise I'll be in more trouble with impish!........Hardi or wedi for the floor depending what the floor substrate is and if there is UFH

I have no local supplier who does Wedi type boards, all have to be sourced through the net...

 

[MW Smith Ceramics]

Good convo tonight chaps.......'wadi board or tanking kit for me all the way now.......

Cheers impish / Paulo

 

[MW Smith Ceramics]

And everyone else, forgot names sorry

 

[MW Smith Ceramics]

And everyone else, forgot names sorry

m

I have no local supplier who does Wedi type boards, all have to be sourced through the net...

me neither I get Marmox 10mm boards online from ( the tile experience ) works out to roughly £7.50 for a 1250x 600 sheet including vat......I get all my Schluter from there too ( cheapest I can find it anywhere @ £8 per metre and my local supplier is selling it at £14!!!!!!.....money grabbing git!!!!......that's daylight robbery!......

 

[MW Smith Ceramics]

thanksfor your replies.

didnt want to tank due to possibility of weight issues once i decide on the tiles, plus the cost as most tanking kits seem to be not large enough to cover the area.

is everbuild aqueseal any good. its only £43 for 7.5m2?

I've never used that one so couldn't say, but I always use Norcross wet seal tanking kit @ £33 and you get around 5 metres ...but I would say if your using heavy tiles go with wedi or Marmox 10 or 12mm glued and mechanically fixed......

 

[jimthetiler]

you can never have enough insulation in a house,insulation is a good thing to have making wedi board the no1 fav.