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Peeling:
Spontaneous loss of ribbons or sheets of paint due to
loss of adhesion. When the surface is coated with a primer
and topcoat, or with several coats of paint, the peeling
may involve all the coats, some of them, or just the
topcoat.
Possible Causes:
Swelling of wood due to seepage or penetration of rain,
humidity and other forms of moisture into the home through
uncaulked joints, deteriorated caulk, leaking roof or
other areas.
Excess humidity or other moisture escaping from within the
home through the exterior walls (less likely with latex
paints, which allow water vapor to escape without
affecting the paint film).
Inadequate surface preparation.
Use of a lower quality paint that has inadequate adhesion
and flexibility characteristics.
Applying latex paint under conditions that hinder good
film formation, e.g., on a very hot or cold day; in windy
weather.
Applying an oil-based paint over a damp or wet surface.
Earlier blistering of paint see Blistering.
Solution:
If exterior moisture is the cause, eliminate the source by
doing necessary repairs and maintenance: replace caulking;
repair roof; clean gutters and downspouts; cut heavy
vegetation away from the building. If moist air is
originating from inside, consider installing vents
(especially in rooms that tend to get humid such as the
kitchen, bathroom and laundry room); attic louvers,
exhaust fans and dehumidifiers may also help. Remove all
loose paint with a scraper or wire brush, sand rough
surfaces and prime any bare wood. Repaint with a top
quality acrylic latex paint -- it will provide excellent
adhesion and allow water vapor to escape without harming
the coating. |
