For normal gaps, no repairs are needed. Adding filler is not a good idea; it will get pushed out as the wood expands with moisture. For larger gaps that don’t close up, call in a professional contractor who can repair floors properly. The best times to repair hardwood floors are April and October.

Should you fill floorboard gaps?

If you find that the gaps are large enough so that a nickel standing upright can slide into the gaps, then you have a problem that needs correction. If you’re certain the gaps are there year-round, it’s probably safe to fill them. It’s best to do this during the humid season, when the gaps are most narrow.

How do you fill in between hardwood floor spaces?





Using a dust and resin filling.



Once you have your sawdust, you need to mix it with a clear resin filler, which you’ll be able to get from any DIY shop or your wood floor supplier. The consistency you’re aiming for is a bit like a thick putty, which you then introduce into the gaps using a spatula.

Should you fill gaps in wood floors before sanding?

The even look of a gap-filled floor is pleasing to the eye but not always necessary. Filling gaps does stop draughts and prevents the build up of dust between the gaps. It also tightens the floor and helps prevent timber movement.

What should I put between floorboards?

Traditional floorboard gap filling techniques and products are time consuming, messy to install and will often fall out over time. DraughtEx is a proven floorboard gap filler, designed to reduce the cold draughts and improve the comfort and energy efficiency of your home.

What to use to fill large gaps in wood?

Wood putty: A putty is a good option for fixing up large gaps and holes. For one, it has natural wood! It won’t have a problem with shrinkage like other fillers, and wood putty is often oil-based. Wood putty can be used with projects for any type of environment.

Will polyurethane fill cracks in wood floor?





Sawdust and Unfinished Floors



Mix the dust with some polyurethane and fill the cracks. Note that this method only works on an unfinished floor and will clash with pre-finished floors.

When should I use wood filler on hardwood floors?


Quote from Youtube video: Because the filler tends to dry harder than the wood as the flooring expands against it the wood grain on the edges of the board seam maybe permanently compressed.