Tips & Tools

Peeling from Wood

Definition:

Occurs when wet wood expands and contracts from moisture and temperature change, causing the paint film to loosen, crack and roll at exposed edges and fall off.

Cause:

Moisture or water seeping into the painted wood surface through uncaulked joints, worn0out caulking or leaks in roofs or walls.
Exterior moisture escaping through exterior walls (more likely if paint is solvent-based)
Vegetation giving off moisture too close to wood siding
Painting damp wood
Power-washing wood and not allowing sufficient time for the wood to dry
Inadequate surface preparation
Painting wood boards or siding too close to the ground
Using a low-quality paint

Prevention

Ensure wood surfaces are clean and dry.
Prepare the surface according to the direction specified on Technical Data Sheet.
Follow the instruction on Technical Data Sheet

Solutions

Inspect the outside of the building to identify and eliminate all sources of moisture, specially windows, trim areas and other joints.
Repair leaks in the roof, clean out gutters and downspouts.
If moist air is rising from the ground through the masonry, waterproof the foundation with a specially designed coating. Remove the portion of the wood that is touching the ground.
Remove all loose paint with a scraper or wire brush, down to the bare wood if necessary.
Power washing is recommended for larger areas and allow wood to dry for three to five days before priming.
Primer bare wood with the appropriate primer.CM 9000 QD White Undercoat/ CM 6000 AC Primer 700/ CM Economical Primer 701/ CM Economical Primer B220
Repaint with two coats of a high-quality acrylic latex paint. CM 9900 Premium High Gloss/ CM NC Industrial Lacquer.

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Tips & Tools

Peeling from Wood

Definition:

Cause:

Prevention

Solutions