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Discuss Good Water resistant thick bed floor adhesive in the Adhesive and Grout area at TilersForums. USA and UK Tiling Forum

S

Sam2494

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Hi,

Currently in the middle of renovating an old property, dug up old quarry's and self levelled! Still out by 10/15mm in spots so looking for a waterproof thick bed https://www.tilersforums.com/forums/tile-adhesive/. Needs to be water resistant due to do DPM, have used ardex NA for Self levelling as moisture resistant.

Anyone have any recommendations?

Cheers
 
OP
R

Rookery

All cement based tile https://www.tilersforums.com/forums/tile-adhesive/ is water-resistant not water proof. For thick bed I use BAL PTB or Weber Thick Bed, depending on where the job is.
 

Andy Allen

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Just because an https://www.tilersforums.com/forums/tile-adhesive/ is water resistant it will not protect from rising damp. A suitable DPM should have been fitted first.
 
OP
S

Sam2494

Well after speaking direct with Ardex & Mapei both said that because we were tile the subfloor a DPM is not necessarily needed, as long as moisture resistant self levelling is used! The floor will breathe through grout joints.
 
OP
S

Sam2494

Sorry I wasn't asking that the https://www.tilersforums.com/forums/tile-adhesive/ to be waterproof from damp or to create a waterproof barrier I meant the https://www.tilersforums.com/forums/tile-adhesive/ needs to be water resistant so t won't break down when in contact with the moisture, I know most adhesives out the bag are unaffected by water
 

Bond

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Well after speaking direct with Ardex & Mapei both said that because we were tile the subfloor a DPM is not necessarily needed, as long as moisture resistant self levelling is used! The floor will breathe through grout joints.

It's a fundamental requirement in habitable buildings to have a suitable damp proof membrane to prevent moisture entering the building from the ground. Ground moisture may also contain mineral ground salts these can potentially cause https://www.tilersforums.com/forums/tile-adhesive/ failure. It's your call of course.
 

Andy Allen

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This is why your floor was tiled with a quarry tile.... It's a natural tile with no glaze and allows the floor to breath.
What tiles were you thinking of putting down?
 
OP
H

hmtiling

It's a fundamental requirement in habitable buildings to have a suitable damp proof membrane to prevent moisture entering the building from the ground. Ground moisture may also contain mineral ground salts these can potentially cause https://www.tilersforums.com/forums/tile-adhesive/ failure. It's your call of course.
Not the case with lime screeds
 
OP
S

Sam2494

Yes I know the quarry's were there because they are a breathable covering, yes it is fundamental in new builds and builds over the last 50 years however I'm working on a 1940/30's property so no integral DPM under the floor slab, used slate for internal dpc of walls and 2 course of blues for external!

We are laying porcelain tiles throughout (yes I know they aren't breathable) however after speaking with Ardex & Mapei technical departments both said exactly the same, no need to use a DPM, only real need for DPM is with timber & vinyl floors. Even with us laying porcelain floor will breathe through grout joints & eventually moisture will make its way through. Cement based adhesives will not be effected by damp they both told me along with Ardex NA self levelling. Natural salts in the ground may cause some essofflerecent coming through grout however chance of this is unlikely.
 

Bond

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Yes I know the quarry's were there because they are a breathable covering, yes it is fundamental in new builds and builds over the last 50 years however I'm working on a 1940/30's property so no integral DPM under the floor slab, used slate for internal dpc of walls and 2 course of blues for external!

We are laying porcelain tiles throughout (yes I know they aren't breathable) however after speaking with Ardex & Mapei technical departments both said exactly the same, no need to use a DPM, only real need for DPM is with timber & vinyl floors. Even with us laying porcelain floor will breathe through grout joints & eventually moisture will make its way through. Cement based adhesives will not be effected by damp they both told me along with Ardex NA self levelling. Natural salts in the ground may cause some essofflerecent coming through grout however chance of this is unlikely.

Crystallasion of salts often causes swelling and forces thus generated can cause https://www.tilersforums.com/forums/tile-adhesive/ failure. ( especially with a relatively impervious tile) . Unlikely l know, nevertheless possible.
 

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