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Peeling Paint - Interior Moisture

The last cause of peeling paint is interior moisture, characterized by cracking and gentle peeling away of the paint from the substrate as it loses adhesion due to the moisture. Moisture originating from behind the paint film, or frontal moisture that forces its way through the paint film, can create this type of paint failure.

Possible Causes

o High humidity areas, such as bathrooms, kitchens, hot tubs and wet basement areas, have created humidity that penetrated the paint film.
o Leaking flashing around a chimney or other exterior wall/roof intersection have allowed water to seep into the house and wet the plaster from behind the paint film, causing the paint to separate from the substrate.

Repair and Prevention

o Ventilate high-moisture areas such as bathrooms by providing an exhaust vent fan that removes humidity and discharges it to the outside.
o Ensure proper ventilation of the roof, walls, and soffits.
o Repair missing or damaged flashing at chimney or other wall/ roof connections.
o Scrape away old peeling paint and feather-sand affected areas. Spot prime bare area. Paint with high-quality acrylic latex paint.

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