Floor Screed Cracking

Potential floor failures cracks found in the floor once the construction is meant to be complete are often blamed on screed failures when it is more often because of problems within the subfloor zone.

Floor screed cracking. It is an irregular pattern of fine cracks in the concrete which is known as surface crazing. If the stress relief joints are not in the correct place or perhaps not used at all the screed may crack. Did he lay the celotex under or over the concrete slab. Its not normal to crack and creak under foot.

In fact they tend to be more visible when the floor gets wet as the very fine cracks trap moisture and dust. Should i bother to fill these before a wooden floor is laid over the top. Next pour about 1 inch of screed onto the floor and lay down long wooden battens to divide the room into 10 foot wide strips. Is the substrate moving.

The screed floor seems sound and fairly flat and even. When commission underfloor heating in a screed there will be thermal movement. However unless you are tasked with the maintenance or repair of concrete floors you may not realise there is a name for this particular feature. I have cracks across a newly laid screed floor.

Before screeding a floor make sure the concrete is clean and free of dust so the screed can adhere to it. These cracks have almost created a grid type pattern in the floor. Always protect the floor screed until the coverings go down. The floor is 5m x 10m and was done in one go.

Using either method is not a guarantee of preventing shrinkage cracking and curling in floor screeds but it will certainly minimise it. Either you have mis inputted the number or something is probably wrong thats the size of a toilet porch no way should there be cracks at that size either it wasnt compacted enough or it was too dry as you were laying it which can cause cracks hollow points get your floorlayer round to asess it and see what he thinks might need a coat or 2 of 1kturbo to strengthen. The brick tie is set into the screed and then when work starts the next day the new screed can be tied in. If the celotex is on the concrete slab there should be a slip joint fitted membrane then minimum of 75mm of floor screed with glass fibre strands added to the mix the screed should be done in one hit.

Building movement or heave. That is shrinkage cracking and curling in floor screeds. How wide and deep does a crack have to be before i should worry about them. The cracking discovered when you lifted the carpet is likely occurring to the concrete screed which is a non structural finish.

Cracks in a 1 4m2 screed. Consideration needs to be given to the location of the crack as well.