Greyish spots and rings on walls and ceilings

 

Grey spots which appear on part of the surface. This problem occurs in winter in some recently built houses.

Grey spots which appear on part of the surface. This problem occurs in winter in some recently built houses.

Causes

  1. Variations in surface temperature resulting from an isolation flaw during construction. Dust settles on the coldest parts of the surfaces and produce greyish rings or spots.

Solutions

  1. Solve insulation problem and wash surface using Polyprep cleaner with active oxygen 771-135 or 771-136, then with household bleach if necessary.