How thick should engineered hardwood be for a New Brunswick home?

For most New Brunswick homes, choose engineered hardwood with a total thickness of at least 1/2 inch (12mm) and a wear layer of 3mm or thicker. This combination provides the structural stability needed for NB's significant humidity swings while giving you enough real wood on top to sand and refinish at least once during the floor's life.

Engineered hardwood comes in total thicknesses ranging from about 3/8 inch (9mm) up to 3/4 inch (19mm). The total thickness affects how the floor feels underfoot, how well it bridges minor subfloor imperfections, and how it transitions to adjacent rooms. But the number that matters most for long-term value is the wear layer — the top layer of real hardwood that you walk on, stain, and refinish. A 1mm wear layer cannot be sanded at all. A 2mm layer allows one very light screening. A 3-4mm layer allows one full sand-and-refinish cycle. A 6mm layer — found on premium products — allows two or even three refinishes over the floor's lifetime, approaching the longevity of solid hardwood.

In New Brunswick specifically, the wear layer thickness also affects how the floor handles seasonal moisture movement. NB homes experience 30-50% relative humidity swings between winter's forced-air drying and summer's Maritime dampness. Even though engineered hardwood's cross-ply construction resists expansion and contraction far better than solid hardwood, the wear layer still moves slightly with humidity changes. A thicker wear layer on a thinner core can telegraph more surface movement, while a well-balanced construction — say 4mm of hardwood on 8-10mm of high-quality plywood core — distributes stress evenly and stays dimensionally stable through NB's seasonal cycles.

For specific applications in NB homes:

• Above-grade living areas (main floor, upper floors): 1/2 inch to 5/8 inch total, 3-4mm wear layer. This is the sweet spot for value, performance, and refinishability. Materials run $5-$9/sq ft in New Brunswick, with installation adding $2-$5/sq ft.
• Basement installations: At least 1/2 inch total with an SPC or plywood core rated for below-grade use. Basements in NB deal with continuous moisture vapour from concrete slabs, especially during spring snowmelt (April-June). Always install over a vapour barrier and test the slab for moisture before proceeding.
• Over radiant heat: Choose engineered hardwood rated for radiant heat applications, typically 1/2 inch to 9/16 inch total. Thicker products insulate against heat transfer and reduce system efficiency. Check the manufacturer's maximum surface temperature rating.
• Floating installations: Thicker boards (5/8 inch or more) feel more solid underfoot when floated over underlayment. Thinner boards (3/8 inch) on a floating system can feel hollow or flexible, especially in high-traffic areas.

Avoid bargain-bin engineered hardwood with total thickness under 3/8 inch or wear layers under 2mm. These products cannot be refinished, feel flimsy underfoot, and their thin construction telegraphs every subfloor imperfection — a real problem in NB's older housing stock where subfloors are rarely perfectly flat. Investing in a quality 1/2 inch product with a 3-4mm wear layer costs a bit more upfront but delivers decades of performance in New Brunswick's demanding Maritime climate.

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

• Arctic Fox Construction Inc.
• Forever Epoxy Inc
• M&L Commercial and residential services
• RenoMe
• FRS Flooring Solutions

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