Tiling Underlay

Hi all,

Currently renovating my bathroom, and have just finished ripping off all the old tiles and gyprock plasterboard. This is a brick veneer home in Melbourne.
May be a stupid question, but prior to wasterproofing and installing wall tiles, can I just place cement sheeting directly on the wall framing, and tile onto that? Or do I have to plaster the walls again first, place the cement sheet on the plaster, waterproof, and then tile.

Thanks

Frosty

 

No you can lay directly into sheeting.

 

Check walls for straightness before re sheeting - studs can be planed etc.

 

Watch a back episode of The Block 2017 - Bathroom Week, it'll tell you all you need to know (about what not to do).

 

Thanks for the feedback.
I have two rooms that I'm renovating. One is just a toilet and basin, the other has a shower, bath and basin.
As previously mentioned, I have timber flooring, and need to install a fibre cement underlay to tile onto. Just wanting to confirm that this is the product I should be using:

Compressed Cement Sheeting available from Bunnings Warehouse

It's very thick (15mm) and expensive. Is this really required in the toilet room?
Will I need to apply waterproofing on top of this product?
I plan on using Villaboard for all walls that will be tiled.

 

Have a read of the Building Code Of Australia to confirm the acceptable construction materials.

If in doubt, check it out! (or ask your building certifier).

 

No, the compressed sheet that you linked is for flooring as it's main purpose and tile underlay as its secondary purpose. Since you already have the flooring (timber floorboards) you just need 6mm tile underlay. James Hardie Ceramic Tile Underlay 1800 x 1200 x 6mm FC Flooring 2.16sqm

 

No
You want ceramic tile underlay I think it’s 8mm
Bunnings have a generic brand that’s a lot cheaper than the james hardy one

 

Great. Thanks for clearing it up

 

I assume waterproofing is still required prior to tiling?
Dunlop 4L Undertile Waterproofing
Is this only required in areas for which a shower/bath will be installed?

 

Be wary of cheap Chinese imports at they may still contain asbestos.

NSW
Victoria
WA
Qld

Article
Unbiased Warning

 

The bunnings ones are okay they are branded not cheap knockoff Chinese import stuff. Just not James Hardie branded
This is what I’m referring to:
Hume Prima Ceramic Tile Underlay 1800 x 900 x 6mm 1.62sqm

 

Get a pro waterproofer in, will
Only cost you $200. Going rate is about $40 per m2 inc product and labour
Cheap price to pay for peace of mind. So many showers leak from tilers and handymen doing waterproofing without any formal waterproofing application training. There’s a lot of prep that is important it’s not just a matter of painting it on. It will crack if not properly applied

 

Depends which state I are in

Generally, to be safe
Entire shower recess and base

Entire bathroom floor if timber, or upstairs, and lipping up walls about 150mm. No point doing floor without lipping up walls a bit otherwise it’s not actually waterproof as water will just leak thru perimeter of floor.

Walls around bath about 600mm high from top of bath and top of bath hob and face of bath hob

Some states don’t require floor done if it’s ground floor concrete slab

 

I disagree. Get a tiler to do their own waterproofing. That way if there is ever a problem, if you split the job up between trades, each of those trades blame each other.



And if you think a 'trained' waterproofer is better....then you haven't seen much of the trade then! Waterproofers are in and out in a flash, can't set hebal blocks square, always leave 'coves' as they dont have to care about the tiling after....

This is why I never tile over someone elses waterproofing.

pinkboy

 

Better yet, use a tiler that is a licensed waterproofer.
If selling in the future, building inspectors are now recommending buyers request a copy of a waterproofing certificate if they get a sniff of diy work.

 

Completely agree with not splitting trades ( one stop shop is always safest for warranty issues and we also dont work with anyone else’s work either) however this guy is DIYing the whole job, I’d never recommend that but he’s going to anyway but he will get a better result getting a pro in for waterproofing than DIY. Having said that we have a team of 8 staff working full time stripping out leaking showers and dodgey bathrooms, so I think regardless it will leak as there is a bit of a science behind making sure bathrooms don’t leak, (we have a steady stream of work from volume builders with new homes that are leaking within a year of construction due to incorrect application by tilers and waterproofers, as in new builds they are in and out and it takes a lot of experience to know all the correct application teqniques and steps involved, and it is better if the tiler has proper waterproofing training becuase then they make sure they set it up properly for screeding and tiling (especially bases).
Leaks can be caused by every trade, from crap waterproofing, crap screeding, little tile cuts used at bottom of showers etc. so true that you need a one stop shop as when u have individual trades they don’t consider the next trade coming in and don’t set it up to ensure everything works out properly

This guy is doing it alone DIY so I’m trying to give him some tips to give him best outcome for his situation and budget.

 

Some tilers can be good at waterproofing but a lot learn by their builder dropping off a bucket of membrane and telling them to waterproof the shower. They literally paint it on and that’s it

 

Is there any way to get some sort of authenticated approval between waterproofing and tiling if you diy?