How to fasten cement sheeting to concrete laundry floor?

[DollyRock]

I have an old concrete slab laundry floor that I want to tile over.  I was looking at laying cement sheets over the slab to tile on.  How do I fasten the sheets to the concrete and do I need to seal/waterproof the concrete before laying the cement sheets? Advice please?

[EricL]

Hello @DollyRock 

Welcome to the Bunnings Workshop community. It's sensational to have you join us, and thanks for sharing your question about your laundry floor.

Cement sheets are designed to be fastened over timber flooring using screws and adhesive. On concrete, they are very difficult to secure because they require mechanical fixings that penetrate both the sheet and the slab. Drilling and plugging through each sheet are laborious and can compromise the slabs integrity, and adhesives alone are not reliable for bonding cement sheeting to concrete. For this reason, cement sheeting is not commonly installed over slabs.

However, in order to level the cement floor for tiling I propose using a Floor Leveller in order to achieve a flat surface for tiling. 

Here is a link to our best advice: How do you level a floor? 

If you have any other questions we can help with, please let us know.

Eric

[DollyRock]

Hi Eric,

Thankyou so much for your advice.  Appreciate your help. Thanks again.  D.