Roof and Catchment Tank Painting in Mountain View, HI

Roof Painting and Catchment Tank Restoration in Mountain View, HI

This roof painting job covered two metal surfaces at a residential property in Mountain View: a multi-section standing seam and corrugated metal roof, and a large corrugated steel catchment tank used for rainwater collection. Mountain View sits in the middle of Puna’s heavy-rainfall corridor, surrounded by dense tropical vegetation, and metal surfaces here deteriorate faster than almost anywhere else in East Hawaii. Both structures had reached the point where the original surface protection had broken down and active rust was spreading. The full scope of work included:

• Surface prep and rust treatment on the main metal roof across multiple planes
• Full paint application on the roof using white exterior roof coating
• Rust treatment and full paint application on the catchment tank exterior

What the Roof and Tank Looked Like Before Painting

The before condition on both surfaces made rust treatment the first priority before any paint could go down. Coating over active rust without neutralizing it first means the corrosion continues spreading under the new paint, and the finish fails early.

The roof showed deterioration consistent with years of Mountain View’s moisture cycling and UV exposure:

• The corrugated panels had lost most of their protective coating, leaving large sections of bare, oxidized metal across multiple roof planes.
• Rust streaking ran the full length of several panel runs, concentrated in the corrugation valleys where water channels and sits longest after rain events.
• The overall surface had a gray, chalky appearance from UV degradation of whatever paint remained.

The catchment tank was in more advanced condition. Extensive rust had spread across the lower half and mid-section of the corrugated steel walls, with large irregular patches of active corrosion running along the horizontal corrugations. A band of original white paint remained near the rim, but the rest of the exterior had been left unprotected long enough for rust to establish a firm hold across a majority of the surface area.

How the Roof and Tank Were Prepped and Painted in Mountain View

Roof Painting

The roof was pressure washed first to remove loose paint, oxidation, dirt, and any biological growth before prep or coating began. Mountain View’s moisture levels mean algae and mildew are common even on bare metal, and any organic material left on the surface will prevent paint from bonding correctly. After washing, rust converter was applied to the corroded areas to chemically neutralize active corrosion at the surface level rather than sealing it in. Once the surface was dry and stable, white roof paint was applied across all sections of the roof, covering the standing seam and corrugated panel areas across every plane.

Catchment Tank Painting

The tank required broader rust treatment given how far the corrosion had spread. Rust converter was applied across the mid and lower walls where active rust covered a significant portion of the surface. The converter was allowed to fully react before any topcoat went down. A few things specific to painting a working catchment system:

• Products used on surfaces that feed a drinking water collection system need to be appropriate for that application.
• The tank cover was kept in place and protected throughout the process to prevent any contamination of the stored water.
• All prep and coating work was limited to the exterior walls.

Once the rust treatment was complete and cured, the tank exterior was painted green to match its original finish and provide a durable protective layer over the treated metal.

The Finished Paint Job and What It Means for This Mountain View Property

Both surfaces came out fully coated with no bare metal or active rust remaining on the exterior.

The roof went from a gray, oxidized patchwork with visible rust streaking to a consistent white across all panels and roof planes. The paint sealed the surface against moisture and UV exposure heading into another rainy season in Puna, which is exactly what a roof in Mountain View needs.

The catchment tank went from an extensively rusted corrugated steel wall to a solid, even coat of green across the full exterior surface from base to rim.

Results across both surfaces:

• The roof is fully coated in white with no missed sections, streaking, or bare metal showing across any plane.
• Panel edges, corrugation valleys, and fastener heads are covered throughout.
• The catchment tank exterior shows uniform green coverage with no rust patches remaining visible on the corrugated walls.
• Both surfaces are now protected against the combination of rainfall, humidity, and UV that accelerates deterioration faster in Mountain View than in most of East Hawaii.

If your metal roof or catchment tank is showing rust streaking, peeling paint, or bare metal in sections, the time to address it is before the next rainy stretch. Surface rust that is caught early is treatable with converter and paint. Rust that has been left unprotected through multiple seasons of Mountain View rainfall eventually works through the metal, and at that point the repair is a replacement rather than a repaint. Getting the coating down at the right stage keeps the job manageable.

Need Your Roof Painted in Mountain View?

Property Wash in Paradise handles metal roof painting, rust treatment, and catchment tank painting throughout Mountain View, Pahoa, Keaau, Hilo, and the broader East Hawaii area. We work the full scope from prep and rust treatment through to final coating on roofs of all configurations. Reach out to talk through what your property needs.

For more on how the process works, visit our roof painting and rust treatment service page.

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Or call us directly: 808-825-6280