Hardibacker Tanking Question - TilersForums.com

[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