Black spots on the ceiling or on the northern wall
POTENTIAL REASONS OF THE PROBLEM
a) Lack of insulation (northerly wall)
b) Increased moisture surroundings
SOLUTION
1: Scraping of loose points and cleaned the dust.
2: Repair substrate (repair moisture or leak, depending on the problem)
3: Prime the surface with STATUS POLYPRIMER
4: Apply STATUS 100% ACRYLIC KITCHEN & BATH in two layers
