Prefinished vs site-finished hardwood — which is better for NB installations?

Prefinished hardwood is the better choice for most NB installations because its factory-applied finish is harder, more moisture-resistant, and eliminates the multi-day finishing process that NB's unpredictable humidity can compromise. That said, site-finished hardwood has specific advantages that make it the right choice in certain situations.

Prefinished hardwood arrives from the factory with its stain and protective coats already applied and cured under controlled UV or heat conditions. These factory finishes — typically aluminum oxide-infused polyurethane — are significantly harder and more scratch-resistant than anything a contractor can apply on-site. The finish is cured in ideal conditions with zero humidity interference, which matters enormously in New Brunswick where indoor humidity can swing from 25% in January to 65% in July. Installation is faster because there is no sanding, staining, or coating on-site, and the floor is ready to walk on immediately after installation. Prefinished solid hardwood runs $8-$14/sq ft fully installed in NB, comparable to site-finished when you factor in the finishing labour.

The main drawback of prefinished hardwood is the micro-bevelled edges between planks. These small V-shaped grooves along each plank edge are necessary to hide minor height differences during installation, but they create tiny channels that collect dust and require more detailed cleaning. Some homeowners find the bevels give the floor a "plank" look rather than the seamless, smooth surface of a site-finished floor. However, many modern prefinished products now offer minimal bevels that are barely noticeable.

Site-finished hardwood is installed as raw, unfinished wood, then sanded perfectly flat and finished on-site with stain and polyurethane. The result is a completely smooth, seamless surface with no bevels — the finish flows continuously across all planks, creating a unified look that many homeowners find more elegant. Site-finishing also allows unlimited custom stain colours, which is valuable if you are matching existing trim, cabinetry, or flooring in another room.

The NB-specific challenge with site-finishing is humidity during the curing process. Oil-based polyurethane needs 3-5 coats with 24-48 hours drying between each coat, and humidity above 50% or temperatures below 15C extend drying times and can cause finish defects like bubbling, clouding, or poor adhesion. In NB, this means site-finishing is best done during the drier months (late fall through winter, with humidity controlled) and should be avoided during the humid summer months or the damp spring season. The house must remain unoccupied during finishing — typically 5-7 days — and the VOC fumes from oil-based finishes require adequate ventilation. Water-based polyurethane dries faster and produces fewer fumes but is slightly less durable than oil-based.

Choose prefinished when: you want the hardest possible finish, you need a faster installation timeline, your project is during NB's humid season, or you want predictable results with less risk. Choose site-finished when: you want a seamless surface with no bevels, you need a custom stain colour, you are matching existing floors, or you are refinishing old hardwood alongside new installation for a uniform look.

Either way, proper acclimation of the wood to your home's environment for 5-10 days before installation is non-negotiable in NB. A professional hardwood installer understands these timing and climate considerations. Get matched with a flooring professional for a free estimate through New Brunswick Flooring.

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

• The Garbage Guys Ltd
• 3Tone Construction Ltd
• First united design & construction inc.
• Thirty Four Renovations
• Modern Epoxy Inc