Hi All
I'm planning the tiling of our kitchen floor with 600x600 rectified 9mm thick porcelain tiles onto retrofit underfloor boards made of high density EPS/polystyrene with an aluminium foil top surface (Wundatherm Premium+). According to the manufacturer, tiles can be laid directly on these boards using a recommended primer and S2 adhesive but I have several questions on the best way to tackle it.
Firstly would an uncoupling membrane like Ditra25 or BAL Rapid Mat be beneficial despite the UFH manufacturer not specifying it? If so, is there significant functional differences or suitability between Ditra/BAL/something else as we're really limited on buildup height due to a low bifold door threshold so the 0.85mm thickness of the BAL would be preferable to the Ditra at around 3mm.
Second question is on adhesive choice. I've done some DIY tiling in the past but not with tiles of this size (the largest were 30x45's in our bathroom), so given I'll be taking it slow and steady using levelling clips/wedges would I be better off with a slow set S2 adhesive or do I go with the more easily sourced fast set and just mix smaller amounts per batch?
My final question is trowel notch size. I know bigger tiles generally need bigger notches but is there a rule of thumb for a certain tile size with a certain adhesive rather than just guesstimating?
Thanks in advance.
I'm planning the tiling of our kitchen floor with 600x600 rectified 9mm thick porcelain tiles onto retrofit underfloor boards made of high density EPS/polystyrene with an aluminium foil top surface (Wundatherm Premium+). According to the manufacturer, tiles can be laid directly on these boards using a recommended primer and S2 adhesive but I have several questions on the best way to tackle it.
Firstly would an uncoupling membrane like Ditra25 or BAL Rapid Mat be beneficial despite the UFH manufacturer not specifying it? If so, is there significant functional differences or suitability between Ditra/BAL/something else as we're really limited on buildup height due to a low bifold door threshold so the 0.85mm thickness of the BAL would be preferable to the Ditra at around 3mm.
Second question is on adhesive choice. I've done some DIY tiling in the past but not with tiles of this size (the largest were 30x45's in our bathroom), so given I'll be taking it slow and steady using levelling clips/wedges would I be better off with a slow set S2 adhesive or do I go with the more easily sourced fast set and just mix smaller amounts per batch?
My final question is trowel notch size. I know bigger tiles generally need bigger notches but is there a rule of thumb for a certain tile size with a certain adhesive rather than just guesstimating?
Thanks in advance.
Last edited: