sanding hardwood floors what grit is a crucial consideration when it comes to achieving a smooth and durable finish.
With various grits to choose from, ranging from coarse to fine, selecting the right one can be overwhelming. Understanding the purpose of each grit, its application, and the results you can expect will help you make an informed decision. In this article, we will delve into the world of sanding hardwood floors and explore the different grits, their uses, and the advantages of each.
Coarse Grits (40-80): Aggressive Sanding

Coarse grits are ideal for initial sanding and removing old finishes or imperfections on the hardwood floor. A coarse grit, typically 40 or 60, is used for this purpose. It is essential to wear protective gear and use a dust mask when sanding with a coarse grit, as the process generates a large amount of dust.

When sanding with a coarse grit, you can expect to remove imperfections, scratches, and old finishes easily. However, be aware that the surface may become scratched further, which requires additional sanding with a higher grit for smoothing.
- Use a coarse grit (40-60) for initial sanding and removing old finishes.
- Wear protective gear and use a dust mask to avoid dust inhalation.
- A coarse grit is not suitable for final sanding, as it may introduce scratches.

Medium Grits (100-120): Smoothing Out the Surface
After removing the old finish and imperfections with a coarse grit, you'll need to switch to a medium grit for smoothing out the surface. Grits 100 and 120 are ideal for this purpose. Sanding with a medium grit helps to refine the surface and prepare it for a new finish.

By using a medium grit, you can achieve a smooth surface without introducing new scratches, making it perfect for final sanding. It's essential to use a pole sander or an orbital sander for this task, as it provides more control and a smooth finish.
Fine Grits (150-220): High-Quality Finish
For achieving a high-quality finish, it's necessary to use a fine grit (150-220). This grade is designed for final sanding and polishing the hardwood floor.
When sanding with a fine grit, you'll notice a significant reduction in dust and a cleaner finish. Fine grit sandpaper is perfect for addressing minor scratches and imperfections. However, it is recommended to work in small sections to ensure an even finish and prevent scratches
Extra-Fine Grits (240 and Higher): Polishing and Refining

High-end finishes can be achieved by using extra-fine grits (240 and higher). Grits in this range are ideal for polishing the hardwood floor to a high shine.
To polish hardwood floors, use a fine grit (240 or higher) when applying the finish, allowing you to obtain a high-gloss finish. The results are well worth the effort: a smooth, durable, and beautiful hardwood floor that requires minimal maintenance and scratches less easily.
Choosing the Right Grit for Your Hardwood Floor
| Grain | Wood Type | Application | Expectations | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Coarse (40-80) | Old finishes and scratches | Unique preparation and cleanliness | Initial sanding, may require additional sanding steps | |||||||||||||||||||||||||||||||||||||
| Medium (100-120) | Recommended for floors with minor scratches or water damage | Healthy profile restoration, less explicit brake on mineral dust | ||||||||||||||||||||||||||||||||||||||
| Fine (150-220) | Repairs and tasks of small dimension changes | Does not build too highly oxidized debris layers, surprising scratches | ||||||||||||||||||||||||||||||||||||||
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sanding hardwood floors what grit is a crucial consideration when it comes to achieving a smooth and durable finish. Coarse Grits (40-80): Aggressive Sanding![]() Coarse grits are ideal for initial sanding and removing old finishes or imperfections on the hardwood floor. A coarse grit, typically 40 or 60, is used for this purpose. It is essential to wear protective gear and use a dust mask when sanding with a coarse grit, as the process generates a large amount of dust. When sanding with a coarse grit, you can expect to remove imperfections, scratches, and old finishes easily. However, be aware that the surface may become scratched further, which requires additional sanding with a higher grit for smoothing. ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]()
Medium Grits (100-120): Smoothing Out the SurfaceAfter removing the old finish and imperfections with a coarse grit, you'll need to switch to a medium grit for smoothing out the surface. Grits 100 and 120 are ideal for this purpose. Sanding with a medium grit helps to refine the surface and prepare it for a new finish. By using a medium grit, you can achieve a smooth surface without introducing new scratches, making it perfect for final sanding. It's essential to use a pole sander or an orbital sander for this task, as it provides more control and a smooth finish. Fine Grits (150-220): High-Quality FinishFor achieving a high-quality finish, it's necessary to use a fine grit (150-220). This grade is designed for final sanding and polishing the hardwood floor. When sanding with a fine grit, you'll notice a significant reduction in dust and a cleaner finish. Fine grit sandpaper is perfect for addressing minor scratches and imperfections. However, it is recommended to work in small sections to ensure an even finish and prevent scratches Extra-Fine Grits (240 and Higher): Polishing and RefiningHigh-end finishes can be achieved by using extra-fine grits (240 and higher). Grits in this range are ideal for polishing the hardwood floor to a high shine. To polish hardwood floors, use a fine grit (240 or higher) when applying the finish, allowing you to obtain a high-gloss finish. The results are well worth the effort: a smooth, durable, and beautiful hardwood floor that requires minimal maintenance and scratches less easily. Choosing the Right Grit for Your Hardwood Floor
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