how soon can i tile floors

[clive matthews]

inch a week has always been said ,4 inch = 4 weeks

 

[DHTiling]

inch a week has always been said ,4 inch = 4 weeks

Been said where...?

Bs 5385 states a mm a day..??

 

[clive matthews]

greatest respect thats what they have always said on a sharp sand screed weather conditions would apply ,concrete alot longer , thats what i would lay a finish on my own developments i tend to give it a stab with a damp meter first though

 

[Ajax123]

standard sand cement drying rate = 1mm per day up to 50mm depth and then add extra (typically 2 days per mm) for each mm over 50mm

some modified sand cement screeds say they dry at a rate of 1 inch per week. However these must be fully cured and the drying conditions tightly controlled as they generally say this rate is only applicable in 20oC and 50% RH.....not conditions we get very often.

The drying rate is also affected by compaction - the better compacted it is the slower it will dry (fewer capillaries for transport of moisture to the surface)

In my experience however the deeper the screed the more unpredictable the drying rate becomes. If this were me I would be using an uncoupling membrane.

By the way - Is this a heated screed? if so you should not cover it before the underfloor heating is comissioned.

 

[Ajax123]

greatest respect thats what they have always said on a sharp sand screed weather conditions would apply ,concrete alot longer , thats what i would lay a finish on my own developments i tend to give it a stab with a damp meter first though

Not the immortal and inimtable "they". On a 75mm sand cement screed you are likely to get away with tiling using a flexible cement based addy after probably 6 weeks. That is very dependent on the weather and drying conditions though.

however the recomendations of the screed manufacturers generally is that it should be dry to below 75% RH before covering

 

[clive matthews]

Not the immortal and inimtable "they". On a 75mm sand cement screed you are likely to get away with tiling using a flexible cement based addy after probably 6 weeks. That is very dependent on the weather and drying conditions though.

however the recomendations of the screed manufacturers generally is that it should be dry to below 75% RH before covering

perhaps i should have said ,i , that is what i have always found on a sharp sand screed in normal conditions ,i cant wait two months before floors are tiled before marketing .

 

[diamondtiling]

perhaps i should have said ,i , that is what i have always found on a sharp sand screed in normal conditions ,i cant wait two months before floors are tiled before marketing .

So we have now found out who "they" are.....its Clive Matthews.........:lol:

Marketing has nothing to do with the integrity of a substrate Clive.
You cant apply that principal to anything in the building trade matey, everything has a set time to dry before you tile on it.

 

[merlecollins]

Hi Raff and :welcome: to the forum

In an ideal world Newcastle would win the premier league and builders would give you 3 months drying time before tiling :hurray: But it doesn't happen, regardless of whether it should or shouldn't - It doesn't. That is then passed over to them as their risk not the tiler's and a letter should be gained to accept your advice but instructing you to tile too soon.
In your instance I would be taking the path of installing Ditra or Dural CI, they're not that expensive and a doddle to install - and you also gain the benefit of complete peace of mind

 

[kent tiler]

hello m8te is this post ment to be here :welcome::welcome: