Hoover full of screed

[Vera16]

Having problems with my screed floor in kitchen extension. At one end it was too thin (30mm) and cracked so builder took up that part. More cracks have since appeared even in thicker parts (see right of photo) and today I unwittingly hoovered a big hole into one edge! Is it normal that you can hoover up crumbly patches at the edge??

[tonyshouse]

Lots of reasons for cracks, too dry mix, too wet mix, incorrect sand, too fast drying out, movement of the sub base or concrete, stress cracks, movement of the insulation,  thermal movement cracks 

 

difficult to tell which you have what will go on top?  
 

I can’t have been compacted properly at the edges or it would have fully filled the gap and so yes bits would easily break off for that reason- use better edge protection movement material and quash screed right tight up to it 

 

 

[nod]

It’s quite normal for a sem-dry screed to be loose around the edges along the membrane