HELP! Do we need a DPM before laying tiles - Tile Advice

[myattcp]

Have decided to go with the following plan of action:
1. Permaguard Epoxy DPM throughout (2 coats)
2. Self levelling compound
3. Install new tiles using Mapei flexible waterproof adhesive

Does this sound sufficient and any more pointers?

Sam did you go with this method? How are the results a few years on ?

 

[Ajax123]

The water has to go somewhere my guess is it will travel under tiles until it reaches
a point of escape normally the walls that suround the room

No it wont unless it's free liquid water. Moisture vapour doesnt work like that.
[automerge]1593632887[/automerge]
You cannot solve ground borne moisture using a liquid DPM. These are designed to protect against residual moisture only. You need a proper tanking system designed to protect against variable moisture levels and pressures. You also need to consider where the floor sits relative to the water table especially in winter.