Build your home from the ground up

Paint failure on Three Forks homes rarely starts at the topcoat. It starts at the interface between the primer and the substrate—or between the new primer and the old paint layer beneath it. When a coating is applied over chalked existing paint without removing the chalk layer first, the new film bonds to the chalk rather than to the substrate, and adhesion failure follows within one or two seasons regardless of topcoat quality. Three Forks sits at the confluence of the Jefferson, Madison, and Gallatin rivers, and the valley's open exposure creates an environment where UV radiation accelerates chalk formation on south and west faces, while spring moisture from river-bottom humidity creates the elevated wood moisture conditions that cause blistering when paint is applied before the substrate has dried to below 15 percent. Identifying these conditions during surface evaluation—before any coating is applied—is what determines whether an exterior paint job reaches its rated service life.

Pronghorn Contracting LLC approaches exterior painting in Three Forks as a coating system rather than a surface application: each component—surface preparation, primer type, application conditions, topcoat spread rate, and caulk sequencing—is selected and sequenced based on the actual substrate condition and exposure. New cedar siding requires a stain-blocking primer to prevent tannin bleed-through that discolors topcoats. Previously painted surfaces with adhesion concerns need bonding primers that grip the existing film rather than relying on it. Metal trim and flashings require direct-to-metal formulations that prevent corrosion-driven delamination at the paint-metal interface. Using the wrong primer for a given substrate produces a visible failure within two seasons regardless of what topcoat covers it.