How Long Does Wood Flooring Take to Acclimatise?

If you've recently ordered a new wood floor and you're eager to get it laid, you might be wondering why the fitter or the instructions are telling you to wait before installation begins. The answer is acclimatisation, one of the most important and most frequently overlooked steps in the entire flooring process. Skip it, or rush it, and you risk a floor that gaps, warps, or buckles after installation. Get it right, and your floor will perform beautifully for decades.

Here's everything from the Wooden Floor Store you need to know about wood floor acclimatisation: what it is, why it matters, how long it takes, and what can affect the process.

What Is Acclimatisation?

Wood is a natural, living material. Even after it has been milled, dried, and finished into flooring boards, it continues to respond to the moisture and temperature conditions of its environment. When the atmospheric conditions change, as they will when your flooring is delivered from a warehouse or storage facility into your home, the wood absorbs or releases moisture accordingly, causing it to expand or contract slightly.

Acclimatisation is the process of allowing your flooring to adjust to the temperature and humidity conditions of the room in which it will be installed before it is laid. By giving the wood time to reach its equilibrium moisture content in your home's environment, you dramatically reduce the risk of the floor moving significantly after installation.

Why Does It Matter?

The consequences of skipping or rushing acclimatisation can be serious and costly. Wood that is installed before it has adjusted to its environment will continue to expand or contract after it is laid. This can result in:

Gapping - if the wood was installed in a slightly more humid environment than your home and then dries out, the boards will shrink, leaving visible gaps between planks.

Cupping or warping - if the wood absorbs moisture after installation, the boards can expand, causing them to push against each other, bow, or lift at the edges.

Buckling - in severe cases, boards can lift entirely from the subfloor as the expanding wood has nowhere to go.

All of these issues are difficult and expensive to fix, and in many cases they could have been avoided entirely with a proper acclimatisation period before installation.

How Long Does Wood Flooring Take to Acclimatise?

The honest answer is: it depends. There is no single universal timeframe that applies to every type of wood flooring in every situation. The length of time required varies depending on several factors, including the type of flooring, the species of wood, the current moisture content of the boards, and the conditions in your home.

As a general guide:

• Solid wood flooring typically requires at least 5 to 7 days of acclimatisation, and in some cases up to 14 days or longer, particularly if there is a significant difference between storage conditions and the conditions in your home.
• Engineered wood flooring generally requires a shorter acclimatisation period of 24 to 48 hours in most cases, thanks to its more dimensionally stable layered construction. However, some manufacturers recommend up to 72 hours, so always check the specific guidance for your product.
• Laminate flooring also benefits from acclimatisation, typically requiring 48 to 72 hours in the room where it will be installed.

These are minimum guidelines. If your home is particularly warm, humid, or dry, or if the flooring has been stored in very different conditions. A cold warehouse in winter, for example, a longer acclimatisation period is always safer.

Where Should the Flooring Be Stored During Acclimatisation?

This is just as important as the duration. The flooring must be stored in the actual room where it will be installed, not in a garage, a hallway, or an adjacent room. Each room in your home can have subtly different temperature and humidity levels, and the floor needs to acclimatise to the specific conditions of the space it will occupy.

The flooring should be stored flat and stacked loosely to allow air to circulate around the boards. Do not leave the boards in their sealed packaging throughout the entire acclimatisation period, open the packs to allow the room's air to reach the wood. Some fitters recommend stacking boards in a staggered formation with small spacers between them to maximise airflow.

Keep the boards away from direct heat sources such as radiators, underfloor heating, and direct sunlight through windows. Exposing the wood to concentrated heat during acclimatisation can cause uneven drying and create problems of its own.

What Conditions Should the Room Be In?

For acclimatisation to be effective, the room needs to be in the condition it will be in when occupied, not mid-renovation. This means:

• The heating should be on and operating at normal living temperature, typically between 18°C and 22°C
• Windows and doors should be closed as they would be in normal use
• Any plastering, screeding, or wet trades should be fully dried out before the flooring is delivered
• The subfloor should be dry - always check subfloor moisture levels before installation begins

If the property is a new build or has recently undergone significant renovation, allow extra time for the building to dry out fully before beginning the flooring acclimatisation process.

Does Engineered Wood Still Need to Acclimatise?

Yes, although engineered wood is significantly more dimensionally stable than solid wood due to its cross-ply construction, it is not immune to movement. The real wood veneer on the surface will still respond to changes in humidity and temperature, and the layered core, while more stable, can still be affected by extreme conditions.

The acclimatisation period for engineered wood is shorter than for solid wood, but it should not be skipped altogether. Most manufacturers specify a minimum period in their installation instructions, and following this guidance is important for maintaining your product warranty.

What About Underfloor Heating?

If your floor is being installed over underfloor heating, the acclimatisation process requires a little extra care. Before the flooring is delivered, the underfloor heating system should be gradually brought up to its normal operating temperature over a period of at least a week, not switched on suddenly at full temperature. This conditions the subfloor and removes any residual moisture.

During acclimatisation, the underfloor heating should be operating at its normal temperature, the floor needs to acclimatise to the conditions it will actually experience in use, and that includes the warmth from below. Once the floor is installed, the heating should be adjusted gradually rather than switched on to maximum immediately, to give the floor time to settle.

How Do I Know When My Floor Has Fully Acclimatised?

The most accurate way to check is with a moisture meter, a tool that measures the moisture content of the wood. Your fitter should ideally use one of these before installation begins. For most wood floors in a typical UK home, a moisture content of between 8% and 12% is acceptable, though the ideal range will vary depending on the species and the manufacturer's guidance.

If you don't have access to a moisture meter, the safest approach is simply to follow the manufacturer's recommended minimum acclimatisation period - and if in any doubt, give it a little longer.

A Quick Acclimatisation Checklist

Before your fitter arrives, run through this checklist:

1. Flooring has been stored in the correct room - not in a garage or hallway
3. Packs have been opened to allow air circulation around the boards
5. Boards are stacked flat and away from direct heat sources
7. The room is at normal living temperature (18–22°C) with heating operating as usual
9. All wet trades - plastering, screeding - are fully dried out
11. Subfloor moisture levels have been checked
13. Minimum acclimatisation period has been observed (or exceeded)
15. For underfloor heating installations - the system has been running at normal temperature prior to installation

The Bottom Line

Acclimatisation is not an optional extra or an unnecessary delay - it is a fundamental part of the installation process that protects your investment and ensures your floor performs as it should for years to come. The few days it takes are a small price to pay compared to the cost and disruption of having to repair or replace a floor that has moved after installation.

If you have any questions about acclimatisation for your specific flooring choice, our team at The Wooden Floor Store is always happy to advise. Visit us in store across the UK and Ireland, or get in touch online at thewoodenfloorstore.com.