These surfaces should be smoothed using pumice, sandstone, hardest burnt brick or a piece of spruce plank, by circular movements; for large surfaces, electrical equipment will be used.
The existing cracks should be opened using a knife and will be repaired using fast setting cement paste.
Check and remove hollow plaster completely as necessary; small areas can be repaired using fast setting cement paste; for large areas use the same type of mortar as existing plaster.
After complete drying, smooth respective area and remove dust.
While carrying repair or re-plastering work, the substrate temperature must be at least 5°C.
Fresh plaster must dry and set for at least 7 days (according to its thickness) before applying finish.