The lifespan of exterior coatings on Vermont homes is determined less by the paint chemistry alone than by the quality of surface preparation and the compatibility of the coating system with the specific substrate and exposure conditions.
In a climate that subjects exterior finishes to freeze-thaw cycling, UV degradation, and moisture saturation, the engineering of the coating system is as critical as the formulation of the paint itself.
Surface Preparation Standards
No coating performs well on an inadequately prepared surface. Our preparation protocols for Vermont homes include power washing with biodegradable detergents, hand-scraping of loose paint to bare wood, and sanding of feathered edges to create gradual transition zones that prevent premature edge failure. We require a minimum of seventy-two hours of drying time between washing and priming, verified by moisture meter readings below fifteen percent on the substrate. For previously coated surfaces, we conduct adhesion testing and coating analysis to identify compatibility issues before specifying the new coating system, preventing the intercoat adhesion failures that account for the majority of premature coating failures in Vermont's climate.
Coating System Selection
Vermont's south-facing elevations experience dramatically different exposure conditions than north-facing surfaces, and we specify coating systems accordingly. South and west elevations receive UV-resistant topcoats with light-reflective pigments that reduce thermal stress, while north elevations prioritize moisture resistance and mildewcide additives. For wood substrates, we specify three-coat systems consisting of a penetrating oil-based primer followed by two coats of 100 percent acrylic topcoat, with recoat windows strictly observed to ensure proper film formation. Our coating specifications include minimum dry film thickness requirements verified by wet-film gauges during application, ensuring that the specified coverage rate is achieved in practice rather than theory.
