uncoupling or no uncoupling

[Ajax123]

How heavy duty are uncoupling membranes in terms of traffic over the top and can they be used with 6" square tiles.

Got a customer who has used anhydrite in a job where it really probably should not have been used. Replacing it is a nightmare so he now wants to put tiles onto it. Is useing very good quality quarries (6"x6"x1"). I now need to offer him whatever advice I can to make it succesful. The likely traffic is small tracked vehicles, cars, pallet truck and palletised goods. Potential moisture ingress means the screed may become wet later on and this can lead to the innevitable tile failure. Could we minimise the risk of this using a dural or ditra mat between the tiles and the screed. Heaviest vehicle probably in the region of 2 tonnes uniformly distributed over 3 or 4 square meters.

Wot do you guys think

 

[DHTiling]

Hi Al..

Some info for you on Ditra..

Load distribution (load impact)
The bottom of the square cavities in Schlüter-DITRA, which are filled with thin-bed adhesive, directly transfer the load impact on the tile covering to the substrate. As a consequence, tile coverings installed on top of Schlüter-DITRA are highly load resistant. If high traffic loads are expected (e.g. in industrial locations), the tiles selected for the installation must be of the corresponding thickness and pressure stability. The requirements of the mandatory guideline "Ceramic Floor Coverings With High Impact Resistance," published by the German Construction Industry Association (ZDB) must be followed.
In areas with high impact loads, the tiles must be fully embedded in the thin-bed adhesive. The contact surface of Schlüter-DITRA amounts to approximately 50% of the total surface. This can reduce the load bearing capacity in case of point loads. For high point loads, select a tile thickness that is capable of distributing the loads. Ceramic tile coverings should not be exposed to the direct impact of hard objects. The tile dimensions should be at least´50 mm x 50 mm.

 

[Ajax123]

Extremely useful Dave thanks. Pretty much tells me what I need. Uncoupling it is then.

 

[DHTiling]

No probs..