Installing hardwood flooring can greatly enhance the appearance of your home. But sometimes， due to shifting of wood or the fluctuation of temperature and humidity， there may be gaps that appear between the boards. These gaps can be unsightly and can cause tripping hazards. Here are some methods to fill in hardwood floor gaps:

1. Hardwood Floor Filler:

One of the most popular methods to fill in hardwood floor gaps is by using a hardwood floor filler. This is a putty-like substance that can be easily applied into gaps and cracks of the hardwood floor. A hardwood floor filler is made up of wood dust and a binding agent that forms a strong bond with the wood， making it an excellent option to fill in gaps.

To use a hardwood floor filler， simply apply the filler into the gap using a putty knife. Make sure to work the filler into the gap and ensure that it is level with the floor. Allow the filler to dry for at least 24 hours， and then sand it down until it is smooth.

2. Sawdust and Glue:

Another method to fill in hardwood floor gaps is by using sawdust and glue. To use this method， gather a small amount of sawdust and mix it with wood glue until it forms a paste-like consistency. Then， apply the paste into the gaps using a putty knife. Make sure to wipe off any excess paste from the floor and allow it to dry for at least 24 hours.

After the glue has dried， sand the area until it is smooth and level with the surrounding floor. This method is effective in filling in smaller gaps and is an affordable option.

3. Rope Filler:

If you have larger gaps between the hardwood floorboards， you can use a rope filler to fill them in. A rope filler is made of natural fibers such as cotton or jute， and is designed to be soaked in a wood stain or floor sealer to match the color of the surrounding wood.

To install a rope filler， first measure the length of the gap and cut the rope to the appropriate length. Then， apply wood glue to the gap and insert the rope， making sure to push it down until it is level with the floor. Allow the glue to dry， and then apply a wood stain or floor sealer to the rope filler until it blends in with the surrounding wood.

In conclusion， hardwood floor gaps can be unsightly and dangerous. But with these methods， you can fill in and repair the gaps to restore the beauty and safety of your hardwood floor.