Hi all.
we had a sharp sand floor screed laid 3 weeks ago fairly dry mix, 80mm in depth and was told to keep of it for a week which we did, today it is beginning to break up with soft patches which are just loose almost like dust 50mm in depth. should we be keeping of the floor longer? the mix perhaps not strong enough ? from looking around should be 3 parts sand 1 part cement. we are also due to have the floor tiled in three weeks around 42 days after laying is this to soon as i read drying takes 1 day per 1mm thickness. your help would be great
we had a sharp sand floor screed laid 3 weeks ago fairly dry mix, 80mm in depth and was told to keep of it for a week which we did, today it is beginning to break up with soft patches which are just loose almost like dust 50mm in depth. should we be keeping of the floor longer? the mix perhaps not strong enough ? from looking around should be 3 parts sand 1 part cement. we are also due to have the floor tiled in three weeks around 42 days after laying is this to soon as i read drying takes 1 day per 1mm thickness. your help would be great