When to Reseal Your Hardwood Fence — and When to Let it Weather
The most common Cumaru fence question we get from year-2 clients: 'Should I reseal it?' The honest answer is 'either is fine — but commit one direction and stick with it.' Mixing sealed and unsealed phases produces uneven patina that looks worse than either approach alone. Here's how to think about the decision.
Written by
Israel Acquino — Founder & General Contractor · CSLB #964664
The case for sealing
Sealing holds the original color. Cumaru stays honey-amber for the first 5-7 years, then deepens to chestnut. Ipe stays olive-brown. Garapa stays bright honey. The sealed look reads more 'finished' and matches better with traditional architecture or projects where the wood is a featured visual element. Maintenance: reseal every 18–30 months depending on UV exposure (south-facing fences need more frequent reseal; north-facing less). Cost: roughly $0.40–$0.85 per linear foot for DIY oil application, $1.10–$1.85 contracted.
The case for unsealed weathering
Unsealed hardwood weathers to silver-grey over 12-24 months. The patina is uniform across the whole fence, structural performance is identical to sealed, and there's no maintenance required. The unsealed look reads more contemporary and often coordinates better with modern architecture, coastal aesthetics, or landscape designs that lean naturalistic. Maintenance: essentially zero — light cleaning if visible dirt accumulates. Cost: $0.
When to commit to which
Sealed: traditional or transitional architecture, want to hold a specific color, project includes accent elements (gates, lighting) that are calibrated to a specific wood color. Unsealed: modern or contemporary architecture, coastal or naturalistic landscape design, want minimum maintenance, project budget doesn't accommodate ongoing reseal cost.
What goes wrong with mixed approach
The failure mode is intermittent sealing — sealing once at install, skipping the year-2 reseal, then sealing again at year 4. The fence shows three different patinas: original color in protected sections, intermediate sealed-and-faded color in some sections, and silvered weathering in unprotected sections. The result reads as poorly maintained even though the wood is structurally fine. Pick one direction at install and stick with it.
Switching directions mid-life
Unsealed to sealed: requires light sanding to remove the silvered surface layer, then oil application. Cost: roughly $3–$7 per linear foot in labor plus material. Best done at year 3-5 when the silvered layer is shallow. Sealed to unsealed: stop oiling at the next scheduled reseal date. The wood will progressively grey over 12-24 months. No labor cost. Most clients who go this direction find the transitional period (months 6-18) least visually appealing.
Questions homeowners ask