How to Fix Gaps in Hardwood Floors: A Step-by-Step Guide

Gaps in hardwood floors can be an eyesore, but the good news is that they are fixable. Fixing gaps in hardwood floors isn’t difficult and with a few steps you can have your floor looking great again. Whether you’re new to DIY projects or an experienced homeowner, this guide will help get your wood floor back into shape. We’ll discuss identifying the problem, causes of gaps, preparing for repair, filling them properly and finishing touches so that you end up with perfect-looking hardwood floors free from unsightly cracks or crevices. Don’t let those pesky gaps ruin your beautiful wood floor – take action today and learn how to fix gaps in hardwood floors!

Identifying the Problem

Gaps between the boards may look like cracks or crevices, but they are actually spaces that have been created by the wood shrinking over time due to changes in humidity levels.

These gaps can range from small slivers to wide chasms depending on how much the wood has shrunken and how long it’s been since it was last refinished. In some cases, these gaps may even become so large that you can fit your finger into them.

Identifying gaps is relatively easy; just take a close look at your flooring and see if there are any visible spaces between the boards. If you find any, then chances are good that those areas need repair work done before they get worse.

In addition to looking for visible signs of wear and tear, another way to identify potential problem spots is by tapping on each board with a hammer or other blunt object. If you hear hollow sounds coming from certain areas when tapped upon, then this could indicate that there’s an issue with those particular sections of flooring which needs attention as soon as possible.

Finally, keep an eye out for discoloration or warping around certain parts of your flooring; this could be caused by moisture seeping through the gaps in between boards which will eventually lead to further damage if not addressed promptly.

Once you have identified the problem, it’s time to look into what could be causing gaps in your hardwood floors.

Causes of Gaps in Hardwood Floors

Gaps between boards can be caused by a variety of factors, including humidity, wear and tear, or poor installation.

Humidity is one of the most common causes of gaps in hardwood floors. Wood expands when exposed to moisture and contracts when it dries out. This expansion and contraction creates gaps between the boards that weren’t there before. If your home has high levels of humidity due to weather conditions or other environmental factors, you may find yourself dealing with these unsightly gaps more often than not.

Wear and tear is another cause of gaps in hardwood floors over time. As wood ages, it becomes weaker and less able to withstand changes in temperature or humidity without expanding or contracting too much which leads to gapping between the boards as well as cupping (when the edges are higher than the center). To minimize this type of damage, make sure you keep up with regular maintenance such as sweeping/vacuuming regularly so dirt doesn’t accumulate on your flooring surfaces which can accelerate wear-and-tear damage over time if left unchecked.

Poor installation is also a major contributor to gapping issues with hardwood flooring because improper nailing techniques used during installation will leave spaces between each board where they should fit snugly together instead. This means that even if everything else looks good on your flooring surface (i.e., no visible signs of wear), you could still have an underlying issue like improper nailing causing those pesky little gaps. The best way to prevent this from happening is by hiring experienced professionals who know how to properly install hardwood floors so that all pieces fit together seamlessly without any noticeable imperfections afterwards; otherwise, you might end up having problems down the line.

Gaps in hardwood floors can be caused by a variety of factors, such as humidity changes or normal wear and tear. Now that you know the causes, it’s time to prepare for repair.

Key Takeaway: Gaps in hardwood floors can be caused by humidity, wear and tear, or poor installation. To prevent gaps from occurring it is important to maintain regular maintenance such as sweepingvacuuming regularly, hire experienced professionals for installation, and keep an eye on humidity levels.

Prepare for Repairing Gaps in Hardwood Floors

Before beginning any repair project, it is important to properly prepare the area. When repairing flooring gaps, this includes cleaning the floor and removing any furniture or rugs from the area.

Cleaning: The first step in preparing for a repair job is to clean the surface of your floor. This will help ensure that dirt and debris don’t get into the gap when you are filling it. Start by sweeping away all dust and dirt with a broom or vacuum cleaner. Then use an appropriate cleaner on your floors such as a mild detergent solution or vinegar-based cleaner if necessary. Allow your floors to dry completely before moving onto the next step of preparation.

Removing Furniture/Rugs: It is also important to remove any furniture or rugs from around the area where you plan on making repairs so that they do not interfere with your work process or become damaged during repairs. If possible, move these items out of sight until after repairs have been completed and allow yourself plenty of space for easy access while working on fixing gaps in your flooring material.

Once you have prepared your workspace by cleaning and removing any obstacles, you can begin the process of repairing gaps in your flooring material.

Once you have properly prepared your hardwood floors for repair, it’s time to move on to the next step: filling gaps.

Filling the Gaps

Gaps in flooring can be a real eyesore, and many home owners want to know how to fix them. Fortunately, there are several ways to fill gaps between boards or planks of wood flooring.

Wood Filler: Wood filler is one of the most popular methods for filling gaps in hardwood floors. It’s easy to apply and comes in a variety of colors so you can find something that matches your existing flooring color. To use it, simply scoop some out with a putty knife and press it into the gap until it’s level with the surrounding surface. Allow the filler to dry completely before sanding it down flush with the rest of your floor using fine-grit sandpaper. Finally, stain or seal as needed for an even finish across all surfaces.

Caulk: Caulk is another option for filling gaps between wood planks on your floors. This method works best when used on wider gaps since caulk won’t adhere well if applied too thin; however, if done correctly this method will create an invisible repair job that looks like new. Start by cleaning out any dirt or debris from within the gap then apply painter’s tape along either side of where you’ll be caulking (this will help keep everything neat). Next, cut off a piece of caulk tube tip at 45 degree angle then squeeze out enough caulk into each gap so that it slightly overfills (you can always wipe away excess later). Smooth out any bumps with your finger then remove tape while wet and allow time for drying before walking on newly repaired area again.

Once you have filled all necessary gaps in your wood floors using either wood filler or caulk, make sure to go back over the entire area once more with fine-grit sandpaper just in case there are any uneven spots left behind from the application process itself. This should only take a few minutes. Afterward, you may need to re-stain or seal affected areas depending on the type and coloration of original material used, which should also help ensure longevity and durability against future wear and tear.

Once the gaps are filled, it’s time to finish off the job with a few final touches.

Key Takeaway: Gaps in hardwood floors can be filled with either wood filler or caulk. After applying, sand down the area and re-stainseal as needed for a finished look. • Wood Filler • Caulk • Sanding • Re-StainingSealing

Finishing Touches

When it comes to finishing your hardwood floor repair, there are a few steps you need to take in order to ensure that the gap is sealed properly and will last for years. The first step is sealing the repaired area with a polyurethane finish. This will help protect the wood from moisture damage and prevent dirt or debris from getting into the gap. You can purchase polyurethane finishes at most home improvement stores or online retailers. Make sure you read all instructions carefully before applying any product as improper application may cause more harm than good.

Once you have applied the polyurethane finish, let it dry completely before walking on it or moving furniture back onto it. Depending on what type of finish you used, this could take anywhere from 12-24 hours so plan accordingly. Once everything has dried, give your floors a final inspection and make sure that no gaps remain visible. If any do appear, use some sandpaper to lightly buff them out until they disappear completely.

Finally, be sure to maintain your hardwood floors going forward by vacuuming regularly and using protective mats under furniture legs when possible. Additionally, consider adding an extra layer of protection such as waxing every 6 months or so which will help keep your floors looking great for years. With these simple tips in mind, you can enjoy beautiful hardwood floors without worrying about pesky gaps appearing again anytime soon.

FAQs – How to Fix Gaps in Hardwood Floors

Should I fill gaps in hardwood floors?

Yes, it is important to fill gaps in hardwood floors. This will help protect the floor from dirt and debris, as well as reduce the risk of water damage or warping. Filling gaps also helps maintain a smooth surface for walking on and can improve the overall appearance of your home. It is best to use a wood filler that matches the color of your flooring for an even look. Make sure to clean any dust or debris before filling in order to get a good seal.

How do you fill gaps between hardwood floors?

Gaps between hardwood floors can be filled with wood filler. This product is available in a variety of colors to match the flooring and comes in either a putty or liquid form. Putty-based fillers are best for small gaps, while liquid fillers are better suited for larger ones. Before applying, make sure to clean the area around the gap thoroughly and let it dry completely before filling. Once applied, use a putty knife to smooth out any excess material and allow it to cure overnight before walking on it again. With the right product and a bit of patience, you can easily fill gaps between hardwood floors.

Why is my hardwood floor separating?

Hardwood floors can separate due to a variety of reasons. One common cause is the contraction and expansion of wood caused by changes in humidity levels, which can cause gaps between boards. Another potential reason is inadequate support or installation, such as not nailing the flooring down properly or using too few nails. Finally, if your home has settled over time it could also be causing separation in your hardwood flooring. To prevent this from happening again make sure you use proper installation techniques and maintain consistent humidity levels in your home.

How do you fix floor gaps?

The most common way to fix floor gaps is by using a floor gap filler. This product is available in various materials such as wood, epoxy, and caulk. It can be applied with a putty knife or caulking gun depending on the material used. Before applying the filler, make sure to clean the area thoroughly and remove any debris that may have accumulated in the gap. Once dry, sand down any excess material before finishing with paint or sealant for an even look. With proper installation and maintenance, these fillers will last for years without needing replacement.


Fixing gaps in hardwood floors can be a daunting task, but with the right preparation and knowledge it can be done. Identifying the problem, understanding the causes of gaps, preparing for repair, filling gaps and making finishing touches are all important steps to take when fixing your hardwood floor. With patience and care you can restore your hardwood floor back to its original beauty. Remember that taking on this project yourself will save you money in the long run so don’t hesitate to fix those gaps in your hardwood floors!

If you are looking for a quick and easy solution to fix gaps in your hardwood floors, look no further than! Our team of experts have the knowledge and experience necessary to provide quality solutions that will help restore your floor’s beauty. We offer repair services such as filling large or small gaps, sanding down uneven surfaces, refinishing old boards with new stain colors, and more. With our expertise in floor installation and maintenance, you can trust us to get the job done right – fast! Contact us today for an estimate on how we can make your hardwood floors beautiful again.

* Last updated on  2024-04-17 / We are using affiliate links / All images are served from the Amazon Product Advertising API.