Can engineered hardwood floors be sanded and refinished in NB?

Most engineered hardwood floors can be sanded and refinished, but the number of times depends entirely on the thickness of the top veneer layer — and this is a critical detail that NB homeowners need to verify before committing to a refinish. Unlike solid hardwood, which is the same species of wood all the way through and can typically be sanded 4-6 times over its lifetime, engineered hardwood has a thin layer of real wood on top of a plywood or HDF core, and that top layer determines everything.

Engineered hardwood with a veneer layer of 3mm or thicker can generally be sanded and refinished once or twice. Each full sand-and-refinish removes approximately 1-1.5mm of wood, so a 4mm veneer gives you room for 1-2 refinishes with a comfortable margin. Many mid-range to premium engineered products sold in NB — from brands like Lauzon, Mercier, and Mirage, all of which are Canadian-made — have veneer layers in the 3-4mm range and are designed to be refinished. Budget engineered hardwood with a veneer layer under 2mm cannot be safely sanded — there is simply not enough wood to remove without cutting through to the plywood core, which ruins the floor.

To determine your veneer thickness, check the product specifications from the manufacturer, look at the product label if you saved it, or carefully examine a floor register opening or transition edge where you can see the cross-section of the plank. If you cannot determine the veneer thickness, a professional flooring refinisher can assess it before committing to the project.

The refinishing process for engineered hardwood in NB requires a lighter touch than solid hardwood. Instead of an aggressive drum sander, professionals use a buffer with a sanding screen or a lighter orbital sander that removes less material per pass. This screen-and-recoat approach removes the existing finish without cutting deeply into the veneer. For engineered floors that need a full sand-down to bare wood for a colour change, the process is more delicate and should only be attempted by a professional experienced with engineered products.

New Brunswick's humidity cycles are actually one of the reasons engineered hardwood is so popular in the province — its layered construction resists the expansion and contraction that plagues solid hardwood during NB's 30-50% annual humidity swings. When it comes time to refinish, that same dimensional stability works in your favour: engineered floors are less likely to have developed the seasonal gapping and movement issues that complicate solid hardwood refinishing in Maritime homes.

A few important tips for NB homeowners considering engineered hardwood refinishing. Never use a drum sander on engineered hardwood — its aggressive cutting action can chew through a thin veneer in seconds. A screen-and-recoat (also called a buff-and-coat) is a lighter, less expensive alternative that removes surface scratches and applies a fresh topcoat without sanding down to bare wood — this runs $2-$3 per square foot in NB and is ideal for floors that are worn but not deeply damaged. A full sand-and-refinish on engineered hardwood with adequate veneer thickness runs the same $3-$6 per square foot as solid hardwood.

This is strictly a professional job. The margin for error on engineered hardwood is razor-thin — literally. Sanding through the veneer in even one spot means that plank must be replaced, and matching replacement planks for discontinued products can be difficult and expensive. Hire a refinishing professional who has specific experience with engineered hardwood.

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

• Forever Epoxy Inc
• 3Tone Construction Ltd
• Gionetterenovations
• M&L Commercial and residential services
• RenoMe