What Is This Screed?

[mattle40]

Apartment block in Leeds.
50mm screed over dpm/insulation
During the rip out today one of the tiles brought a full depth chunk with it and it's very damp.
Been untouched since built 8 years ago.

Any thoughts are appreciated thanks

 

[White Room]

That looks like a sand/cement screed....

 

[Old Mod]

That looks like a sand/cement screed....

Emphasis on the sand! Haha

 

[mattle40]

I thought so but it doesn't feel right, maybe too much sand, feels like it would break up very easily

 

[mattle40]

Emphasis on the sand! Haha

Beat me to it lol

 

[White Room]

If it's over insulation should be 65mm minimum....

 

[mattle40]

To be honest I was generous with 50mm, probably more like 40mm
The homeowner has got the apartment builder coming tomorrow so I wanted to be armed with opinions

 

[The Legend; Phil Hobson RIP]

As Mark (Whitebeam) says 65mm is minimum., if it is semi-dry it should be 4:1 grit sand and portland mixed so you can compress a hand full and it is not to wet, but stays firm in your palm.

A lot of fixers mixed by hand, so you will never get the exact ratio, ready mix is much more accurate, you can also have retarders added at the batching plant, this can give you longer to work with the load.

Regards, Phil.