DESCRIPITION

Loss of adhesion of the paint film (usually down to the bare surface) around window frames and sills.

POSSIBLE CAUSE

• Paint usually peels from window sills and frames because of moisture. Water standing on the sills eventually penetrates the paint film. When it later evaporates, the pressure from under the film causes peeling. This moisture may be condensation on the interior, or rain and snow on the exterior.
• Paint also peels from window sills due to poorly sealed framing that was not properly caulked; or the caulk has cracked or peeled away, allowing water to undermine the coating.

SOLUTION

• Remove as much paint as possible by scraping, sanding, chemical stripper, or heat gun. Follow all manufacturers’ direction when using chemical strippers or heat guns Test the coating surrounding any peeled areas out about 6” to 12” to be sure the adhesion is adequate.
• Prime bare surface with the appropriate primer and caulk where necessary, especially at angles and crevices, to eliminate any opportunity for moisture to penetrate into the substrate.
• Do not seal or paint shut any vent holes in the window trim of storm windows?
• If a wood surface is deteriorated, replace it using cedar, redwood, or pressure-treats wood. Prime the butt ends of the wood before installation to reduce moisture penetration.
• The use of storm windows and dehumidifiers may help prevent recurrence of peeling.
• Outside, use SWP Gloss Oil Based Enamel or SuperPaint Exterior Latex High Gloss Enamel for surfaces exposed to standing snow and rain to help keep water from entering the wood. On new wood, use oil-based primer and two topcoats of exterior gloss. Both SWP Oil Gloss and SuperPaint High Gloss stand up particularly well to higher moisture levels.

SYSTEM

INTERIOR

• Primer, if needed PreRite Wall & Wood Oil Primer/Undercoated or PrepRite Classic Primer
• Caulk ProSelect 1230A, C-1100A, or Window & Door
• Finish Refer to our Interior Paint Chart to determine
• which product best fits your needs.
• Suggested Finishes Cashmere, SuperPaint, ProClassic

EXTERIOR

• Primer, if needed A-100 Exterior Primer, or Loon Masonry
• Primer or Al Surface Enamel primer
• Caulk ProSelect 1550A, 1230A, 1100A, or Window &
• Door; ConFlex Elastomeric Sealants
• Finish Refer to our Exterior Paint Chart to determine
• which product best fits your needs.
• Suggested Finishes Duration, SuperPaint, SWP, A-100, WoodScapes.