What is the difference between solid and engineered hardwood for NB conditions?

The fundamental difference is construction: solid hardwood is a single piece of wood (typically 3/4 inch thick), while engineered hardwood is a real wood wear layer bonded to multiple plywood or HDF layers beneath. This construction difference makes engineered hardwood dramatically more dimensionally stable in New Brunswick's Maritime climate — and that stability is the single most important factor for flooring performance in this province.

Solid hardwood expands and contracts as a single mass in response to humidity changes. In NB, where indoor relative humidity can swing from 20-30% in winter (forced-air heating) to 60-65% in summer (Maritime humidity), solid hardwood moves significantly across its width. A typical 3-1/4 inch red oak plank can expand or contract by 1-2mm seasonally. Across a 12-foot room, that cumulative movement creates visible winter gaps between planks and risks summer cupping or buckling if expansion gaps are insufficient. Solid hardwood demands nail-down installation over a wood subfloor — it cannot be installed over concrete and should never go below grade (basements). In the NB market, solid hardwood costs $5-$8/sq ft for materials (domestic species like oak, maple, birch) plus $3-$6/sq ft for professional nail-down installation, totalling $8-$14/sq ft fully installed.

Engineered hardwood resists humidity-driven movement because its cross-layered plywood core constrains the wood's natural expansion. Each layer is oriented perpendicular to the next, meaning the wood pulls against itself rather than moving freely. In NB conditions, engineered hardwood shows 50-70% less seasonal movement than solid, which means dramatically less gapping in winter and virtually no cupping risk in summer when paired with basic humidity management. Engineered can be installed floating, glued down, or nailed down — and crucially, it can be glued directly to concrete slabs, making it the only real hardwood option for NB basements (though I would still recommend LVP below grade for maximum moisture protection). Materials run $4-$9/sq ft with installation at $2-$5/sq ft, totalling $6-$14/sq ft fully installed.

Refinishing and Longevity

Solid hardwood's greatest advantage is refinishing potential. At 3/4 inch thick with roughly 5mm of usable wood above the tongue, solid hardwood can be sanded and refinished 4-6 times over its lifespan — potentially lasting 75-100 years in an NB home with proper humidity control. Each refinishing costs $3-$6/sq ft in New Brunswick and completely restores the floor's appearance.

Engineered hardwood's refinishing potential depends entirely on its wear layer thickness. Budget products with a 1-2mm veneer cannot be meaningfully refinished. Mid-range products with a 3-4mm wear layer allow 1-2 light sandings. Premium engineered with a 5-6mm wear layer can be refinished 2-3 times, approaching solid hardwood's longevity. When shopping for engineered hardwood in NB, invest in at least a 3mm wear layer — it is worth the premium for a product you can maintain long-term.

For most New Brunswick homes, engineered hardwood is the smarter choice. It handles the Maritime humidity swings that punish solid hardwood, offers flexible installation methods including over concrete, and premium products with thick wear layers deliver comparable longevity. Reserve solid hardwood for heritage restorations or homes with excellent year-round humidity control, and always maintain 35-55% indoor RH regardless of which product you choose.

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