Why Do My Wood Floors Gap in the Winter?

During January and February every year, it’s very common for concerned home owners to call their local wood flooring specialist with this very question, this year more so this than before. So what do the gaps in your floor have to do with this time of year, and what can you do about it?

Seasonal Wood Floor Gaps Fargo

First of all we should clarify that if you have a older wood floor, say 50-100 years old, your floor may have permanent gaps throughout, and those gaps are likely filled with years of dirt and debris. This information does, however, still apply to your older floors, since, although they have permanent gaps, these gaps are likely to get larger during the winter months.

The answer is simple, wood contracts when it loses moisture. In other words, when the humidity in your house drops, the air starts sucking moisture from the wood until they reach an equilibrium (Equilibrium Moisture Content). The acclimates to the environment it is in. When the wood drys out, it shrinks. When it shrinks, you get gaps in your floors.

In Fargo, North Dakota, the humidity in the average house fluctuates between 38-55%. However, when we get cold snaps and our heating systems start working extra hard, the humidity starts to drop below “normal living conditions.” January and February of 2014 have proven to be an exceptionally cold winter, and homes are running their heating systems on overtime.

So what’s the solution? Humidity! You wonder why you have been getting shocked 5 times a day and been waking up with a dry mouth. It’s too dry in your house! Keeping humidity between 38-55% is not just good for your wood floors, it’s also good for your trim work, cabinetry, wood furniture, and, of course, your comfort.

It’s time to get a humidifier! Unfortunately, the $35 dollar Walmart special isn’t going to cut it. You can either invest in 1 or 2 multi-room humidifiers, but they can be noisy and need to be maintained with constantly adding water. The best solution is to attach a humidifying system to your HVAC system. These will run you about $600 installed and are worth every penny. You just set the humidity to what you want and the system takes care of the rest. However, there is a catch.

If you have older or inefficient windows, you may find that keeping your humidity at “normal living conditions” during cold snaps creates a lot of condensation on your windows. If this is the case, you have three options. Here they are from least expensive to most expensive:

1. Set the humidity to the highest level the windows will allow, and you will just have to live with some seasonal gaps in your floor.
2. Plastic your windows. This will not only fix your condensation problem, but it will cut down on your heating bill.
3. Get new windows.

There is one more solution for those that don’t yet have hardwood, but are planning on having it installed in the future.

4. Choose engineered hardwood flooring. Engineered wood flooring is designed to handle much higher moisture swings due to the way it is manufactured. Just make sure you buy a high quality engineered product, such as Owens Plank, RealWood Floors, or Ashawa Bay Hardwood Floors (5/8″ thick with a wear layer of at least 4mm) or you might find yourself with worse problems than seasonal gapping!

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  • What our customers have to say…

    “We so appreciate Jim’s professionalism, honesty, respect, eye to detail, and woodworking skill. He is a perfectionist not only with the install but also with the cleanup at the end of each day. Our beautiful new floors have dramatically changed the look of our home and everyone who comes to visit will comment on the change. We are extremely happy with our new floors.”

    Ron and Carol Halverson, West Fargo, ND

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