23
TESTING OF CRACK
FORMATION
TESTING THE PERMANENT DRYNESS
OF THE SUBFLOOR AND THE CLIMATE
OF THE ROOM
TESTING THE STRENGTH
Cracks in the subfloor, shrinkage cracks in the
screed.
Insuff iciently dry subfloor or coherent room climate.
Surface not suff iciently firm or too porous.
elevated screed corner due to shrinkage
during drying
planned screed surface aft er drying
planned screed surface aft er drying
crack
broken screed corner
ATTENTION: Clamp and close cracks.
Movement joints are to be be transferred
to the upper ground.
ATTENTION: Moisture measurements of the
subfloor must be documented.
ATTENTION: Suff icient
strength must be provided.
scratch test
Estrichunter-
brechung
Riss
Scheinfuge
Bewegungs-
fuge
CM - measuring device