How long does hardwood flooring need to acclimate before installation in a New Brunswick home?

Hardwood flooring should acclimate in your New Brunswick home for a minimum of 5-10 days before installation, and in some cases up to 14 days. This is not optional — skipping or shortening acclimation is the single most common cause of hardwood flooring failure in the province, and NB's Maritime climate makes it even more critical than in drier inland regions.

Acclimation means bringing your hardwood flooring to moisture equilibrium with the environment where it will live permanently. Wood is hygroscopic — it constantly absorbs and releases moisture to match its surroundings. When hardwood arrives at your home, it may have been stored in a warehouse, transported in an unheated truck, or manufactured in a climate very different from your living space. If you install it before it reaches equilibrium, the wood will continue to adjust after installation, causing gaps, cupping, buckling, or squeaking that could have been entirely avoided.

The NB-specific challenge is that our Maritime humidity levels are higher and more variable than what most hardwood manufacturers calibrate for. Wood shipped from central Canadian or American mills is often dried to 6-8% moisture content, while a New Brunswick home in summer may have conditions that push wood toward 9-12% MC. If you install that dry wood and it absorbs Maritime moisture, it expands — potentially dramatically. Conversely, installing in late fall when your home is already dry and the wood arrived during humid conditions means the wood will shrink as your furnace drops indoor humidity through winter.

How to Acclimate Properly

Open all boxes and spread the planks in the room where they will be installed — do not leave them stacked in sealed cartons. The wood needs air circulation on all sides to reach equilibrium. Your home's HVAC system should be running at normal living conditions during the entire acclimation period: heat on if it is heating season, AC or dehumidifier running if it is summer. The goal is to match installation conditions to year-round living conditions.

Use a pin-type moisture metre to check the wood's moisture content and compare it to your subfloor. The difference between the hardwood and the wood subfloor should be no more than 2-4% moisture content. For concrete subfloors, perform a calcium chloride or relative humidity probe test — concrete should read below 3 lbs/1,000 sq ft/24 hrs (calcium chloride) or below 75% RH (in-situ probe) before proceeding.

Timing matters in NB. The best seasons to install hardwood in New Brunswick are late fall (October-November) and early spring (late March-April), when indoor humidity is moderate and your HVAC system is maintaining stable conditions. Avoid installing during the peak of winter drying (January-February) when humidity may be at its lowest, or during the height of summer humidity (July-August) when moisture content is at its peak. Installing at either extreme means the wood has the maximum distance to travel in the opposite direction.

A professional installer will always verify moisture content with a metre before beginning work. If yours does not, ask why. This simple step, combined with proper acclimation, is the difference between a hardwood floor that performs beautifully for decades and one that develops problems within the first year.

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• M&L Commercial and residential services
• Thirty Four Renovations
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• Forever Epoxy Inc
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