how to use wood filler for hardwood flooring?

Wood filler is a key part of the hardwood flooring process. It’s used to fill in gaps, cracks, and holes left by old or damaged boards before sanding them down.

But how do you use wood filler for your own home project? Read on for our guide to everything you need to know about filling gaps and holes in hardwood floors!

Do you use wood filler before or after sanding hardwood floors?

The best way to fill and sand hardwood floors are by doing the following:

  • Sand your floor (if it needs it)
  • Fill any cracks with wood filler after they’re dry and sand again
  • Finish as normal

Should you fill hardwood floor gaps?

Let’s talk about whether or not you should fill hardwood floor gaps. In the vast majority of cases, it’s a good idea to use wood filler to fill in the gaps between your hardwood boards.

This is true even if you have a new floor that doesn’t have any gaps in it yet—there will always be some small imperfections as time goes on and your floors settle into their new environment.

You might also want to consider filling in the gaps between the wall and baseboard, particularly if your floors are being installed over carpeting or tile that has been removed from other parts of your home.

This will help reduce creaking sounds as people walk around on top of them, as well as make sure no moisture gets trapped between these two surfaces so that there aren’t any issues down the line when mold starts growing inside those areas (the last thing anyone needs is mold!).

What do I use to fill cracks in hardwood floors?

Putty is the most common filler for repairing cracks in hardwood floors. Putty comes in many forms, from wood putty to polyurethane to epoxy resin.

While you can use any of these materials, we recommend using wood filler for the job.

Wood fillers and putties are available at home centers and hardware stores such as Home Depot and Lowes.

They’re also readily available online through Amazon or other retailers like All-State Supply Company which sells several types including:

  • Colored Epoxy Filler (Black)
  • Super Fill Wood Filler (White)

Wood Fillers tend to be easier than other types because they don’t need sanding or priming before applying them; just apply them directly into your crack with a putty knife!

Wood Fillers also come in different colors so you can match them up with your floor if desired–this is especially helpful if your floor has been stained previously but now needs repair work done on top of that stain!

How do you fill the gaps between hardwood floors?

If your hardwood floors are uneven and you’re filling gaps between the boards, follow these steps:

  • Use a putty knife to apply the wood filler to the gap between the boards.
  • Smooth out the wood filler with a damp sponge.
  • Let it dry completely before sanding it down with 100-grit sandpaper, then repeat until you have filled all of your gaps.

Should you prime before using wood filler?

You can use wood filler on your hardwood floors without priming. But, if you choose to prime, be sure to sand it off before applying the wood filler.

What kind of wood filler do you use on hardwood floors?

One of the most common questions when it comes to filling holes in hardwood floors is, “What kind of wood filler do you use?” The answer depends on how big the gap is.

If it’s a small gap (less than 1/2-inch deep), you should use a wood filler that is designed for wood floors. For larger gaps (1/2 inch or deeper), use a putty designed for repairing large holes in hardwood flooring.

What’s the difference between wood filler and wood putty?

Wood putty and wood filler are both used to fill small cracks and holes in hardwood floors. But they’re different products.

Wood putty is a powder that you mix with water before using it to fill small gaps and holes in your flooring.

It’s easy to use, but it can be tricky to make sure the wood putty doesn’t clump up or run out of the seam once you’ve applied it.

If a large area or big gap needs filling, wood filler may be better because you only need a small amount at a time—you don’t have to worry about getting too much on your hands while spreading it out over the surface of your flooring.

How do you use wood filler for large gaps?

The best way to apply wood filler is with a putty knife. First, you’ll want to make sure that the gap is clean and dry.

If it’s not, clean any dust or dirt out of the crack with a vacuum before applying the adhesive. Next, mix up some adhesive and apply it directly into the gap using your putty knife (you can also use an old credit card).

Make sure that you’re filling up all of the space between where your floor meets its adjoining surface—if you don’t fill this area completely, there will be an obvious line when you sand down the wood filler later on!

Allow the adhesive time enough to completely dry before moving on to sanding down your surface for finishing touches; this will prevent dust from coming off onto surrounding surfaces when sanding so that everything looks uniform once finished!


Now that you know all about wood filler for gaps in hardwood floors and how to use it, you’re ready to start filling those cracks! There are many different types of wood filler available at home improvement stores and online.

We recommend choosing one that has a creamy consistency so that it spreads easily over the surface while still drying clear enough to match the color of your flooring.

It’s also important to remember that filling gaps is not a permanent solution—instead, think of it as an opportunity for something new (like adding new strips or planks).

But don’t worry: if you make sure there are no gaps left between boards when they dry out again later on down the road, this repair job could last quite some time before needing another touch-up job.

Photo of author

Martin Flood

Martin Flood has been working in the construction industry for over 20 years as a general contractor with expertise in remodeling projects that are large or small. He has furthered his career by specializing in epoxy resin flooring, providing excellent service to both commercial and residential clients. Martin’s experience enables him to offer professional advice on how to choose the right type of project based on your needs and budget.

Leave a Comment