How do I know if my NB hardwood floors can be refinished or need replacement?

Your NB hardwood floors can likely be refinished if the wood is still structurally sound and has enough thickness remaining above the tongue-and-groove joint to survive another sanding pass. Most solid hardwood floors can be refinished 3-5 times over their lifetime, and many older NB homes have original hardwood that's been refinished only once or twice — meaning there's plenty of life left.

The most reliable way to check is the thickness test. Solid hardwood flooring is typically 3/4 inch thick, with the wear surface above the tongue measuring roughly 1/4 inch (about 6mm). Each refinishing pass removes approximately 1-2mm of wood. If your floor has been refinished multiple times and the wood above the tongue is getting thin — less than 2mm — another sanding risks exposing the tongue or creating weak spots. You can check by removing a floor register or transition strip and examining the plank edge from the side. If you can see the tongue is close to the surface, replacement is the safer option.

Engineered hardwood has more limited refinishing potential. The veneer wear layer on engineered products ranges from 1mm (cannot be refinished) to 4-6mm (can be refinished 1-2 times). Check your product specifications if you have them. If you don't know the veneer thickness, a professional can assess it.

Signs your floor can be refinished include surface scratches and wear patterns that don't penetrate deeply into the wood, dulled or worn finish that makes the floor look tired but the wood beneath is solid, minor water stains that are in the finish rather than deep in the wood grain, and small gaps between planks from seasonal movement. All of these are cosmetic issues that sanding and refinishing will address beautifully. Refinishing 1,000 sq ft of hardwood in NB costs $3,000-$6,000 — significantly less than replacement.

Signs your floor needs partial or full replacement are more serious. Structural damage — boards that are soft, spongy, or crumbling when pressed — indicates rot, typically from prolonged moisture exposure. This is common in older NB homes near exterior walls where ice damming, plumbing leaks, or foundation moisture has reached the subfloor. Severe cupping or crowning that persists year-round (not just seasonal movement) indicates ongoing moisture problems that refinishing won't solve — you need to fix the moisture source first, then replace affected boards. Deep pet stains that have penetrated through the wood and into the subfloor leave dark, permanent discolouration that sanding cannot remove. Widespread board damage where more than 30-40% of the floor needs individual board replacement makes full replacement more cost-effective than patching.

NB-specific factors that affect this assessment include the age and condition of your home's subfloor. Many NB homes built before the 1970s have original board subfloors that may have their own moisture and structural issues. If your hardwood is being removed for any reason, it's the perfect opportunity to assess and upgrade the subfloor — adding a plywood overlay ($1.50-$3.00/sq ft) over old board subfloors creates a flat, stable base for new flooring.

Also consider NB's humidity cycles. If your hardwood has survived decades of Maritime humidity swings and is still structurally sound, it's proven wood — refinishing it preserves a floor that has already demonstrated its ability to perform in NB conditions. New hardwood still needs to prove itself through those same cycles.

Have a professional flooring contractor assess your floors before deciding. They can measure remaining wood thickness, identify structural concerns, and give you an honest recommendation on refinishing versus replacement. Most NB flooring professionals will provide this assessment as part of a free estimate.

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Looking for experienced contractors? The New Brunswick Construction Network connects homeowners with qualified professionals:

• Arctic Fox Construction Inc.
• Thirty Four Renovations
• Gionetterenovations
• M&L Commercial and residential services
• Forever Epoxy Inc