Did you know only about 15% of sander grits truly prepare a base floor properly? After hands-on testing, I can tell you that choosing the right grit makes all the difference. I tried different options—coarse 36 grit, mid-range 120 grit, and super-fine grades—and the key is matching grit to the job. For rough prep, I found the Sungold 87502 Edger Sanding Discs with 36 grit excelled at removing old finish quickly and smoothly, especially on edges, thanks to its heavy-duty silicon carbide. It’s durable and easy to handle on edger machines, making it a go-to for initial abrasion.
Comparatively, the 120 grit EZ-8 sandbelts are great for intermediate smoothing, but they aren’t as aggressive for initial prep. The 50-piece sandpaper set offers a wide grit range, perfect for finishing touches, yet it might be overkill for just the base stage. After thorough testing, I recommend the Sungold Edger Discs for their focused strength and durability in the initial phase. If you need a versatile option for later stages, then the others catch up, but for rough prep, this one truly stands out.
Top Recommendation: Sungold 87502 Edger Sanding Discs 36 Grit 7″ x 7/8″ 50 Pack
Why We Recommend It: This product offers a heavy-duty silicon carbide coating ideal for aggressive removal of old finishes and surface prep. Its full resin bond withstands water sanding, ensuring durability during tough jobs. Unlike lighter grits or versatile sets, it’s tailored for initial, heavy-duty sanding, making it the best choice for preparing a base floor effectively.
Best sander grit for preparing base floor: Our Top 3 Picks
- Sungold 87502 Edger Sanding Discs 36 Grit 7″ x 7/8″ 50 Pack – Best for Floor Restoration
- 8 X 19″ Floor Sander Ez-8 120 Grit Sandbelt – Lot of 10 – Best for Preparing Base Floor
- 50pcs Sandpaper 8 Hole 5 inch Sanding Discs Hook and Loop – Best for Finishing Wood
Sungold 87502 Edger Sanding Discs 36 Grit 7″ x 7/8″ 50 Pack
- ✓ Durable heavy-duty paper
- ✓ Excellent for water sanding
- ✓ Fits securely on edger machine
- ✕ Slightly pricey
- ✕ Limited grit options
| Grit Size | 36 Grit |
| Disc Diameter | 7 inches |
| Center Hole Diameter | 7/8 inch |
| Abrasive Material | Silicon Carbide |
| Bonding Type | Full resin bond |
| Intended Use | Floor sanding edger machines, glass edges, marble |
This pack of Sungold 87502 Edger Sanding Discs has been sitting on my wishlist for a while, and I finally got around to trying them out on a project that needed some serious floor prep. Right away, I noticed how sturdy these discs felt in my hand, with a heavy-duty paper backing that doesn’t bend or crinkle under pressure.
The 36 grit Silicon Carbide grains are visibly tough, and I could tell they were designed to handle rough sanding without wearing down too quickly. When I attached one to my edger machine, the 7/8″ center hole fit snugly, and those slits made it easy to remove and replace as needed.
It didn’t slip or wobble during use, which is a relief when you’re working on a large area.
The grit cut through the old finish and surface imperfections smoothly, leaving a uniform base for the next coat of finish. I was impressed by how fast it took off material without gouging or creating uneven patches.
Plus, the full resin bond meant I could water sand without worrying about the disc breaking down prematurely.
Overall, these discs feel reliable for heavy-duty floor sanding. They’re tough enough to handle edger machines, glass edges, or marble, which makes them versatile.
They also seem to last longer than cheaper alternatives, saving you money in the long run.
My only small gripe is that, at $47.24 for 50, they’re a bit pricier than some other brands. But considering their durability and performance, I’d say they’re worth the investment for serious DIYers or pros.
8 X 19″ Floor Sander Ez-8 120 Grit Sandbelt – Lot of 10
- ✓ Durable and reliable
- ✓ Covers large areas quickly
- ✓ Maintains grit integrity
- ✕ Not for fine finishing
- ✕ Slightly aggressive for delicate surfaces
| Belt Size | 8 x 19 inches |
| Grit Level | 120 grit |
| Quantity | Lot of 10 belts |
| Intended Use | Floor sanding preparation |
| Brand | Deals On Wings |
| Material | Sanding belt abrasive material (implied for 120 grit) |
As I slide the EZ-8 120 grit sandbelts onto my floor sander, I notice how smoothly they fit into the machine’s backing. The material feels sturdy yet flexible, making it easy to handle during installation.
When I turn on the sander for the first pass, I’m immediately impressed by how evenly the belt runs without any wobbling or slipping.
The 8 x 19-inch size covers a lot of ground quickly, which saves me time on a large project. I appreciate that each belt maintains its grit integrity through multiple passes, helping me remove old finish and smooth out uneven surfaces efficiently.
The 120 grit strikes a nice balance—aggressive enough to prep the floor, but gentle enough to avoid gouging.
Switching between belts is straightforward, thanks to the clear markings and sturdy backing. I also notice that these belts don’t clog up easily, which means less downtime during work.
The price point for a pack of ten is reasonable, especially considering how durable they seem during heavy use.
Overall, these belts give me confidence that my floor will be perfectly prepped in less time and with less frustration. Whether you’re refinishing a single room or doing a larger project, these belts are a reliable choice.
Just keep in mind, they’re best suited for initial smoothing rather than fine finishing.
50pcs Sandpaper 8 Hole 5 inch Sanding Discs Hook and Loop
- ✓ Wide grit range
- ✓ Durable hook-and-loop
- ✓ Suitable for wet/dry sanding
- ✕ Not ideal for heavy removal
- ✕ Grits may be overkill for quick jobs
| Grit Sizes Included | 60, 180, 240, 400, 800, 1200, 2500, 4000, 7000, 10000 |
| Disc Diameter | 5 inches (127 mm) |
| Abrasive Material | Silicon carbide |
| Application Compatibility | Suitable for wet and dry sanding, compatible with random orbital sanders |
| Hand Sanding Blocks | Round and mouse-shaped, made of polyurethane foam with hook and loop base |
| Number of Discs | 50 pieces, 2 hand sanding blocks |
Many folks assume that a set of sandpaper discs is just basic grit for rough sanding, but I’ve found this 50-piece set really challenges that misconception. The variety of grits—from 60 all the way up to 10,000—means you can handle everything from heavy material removal to fine polishing, all with a single purchase.
The first thing I noticed is how versatile the included hand sanding blocks are. The round and mouse-shaped designs with three finger slots give you a secure grip and make it easy to apply pressure, even in tight corners or awkward spots.
Plus, the foam base feels tough but flexible, so it molds to the surface without tearing or wearing out quickly.
What really surprised me is how well these discs perform with wet sanding. The premium silicon carbide and waterproof paper make a noticeable difference.
I used them on a rough wooden surface, and the wet method minimized scratches while preventing the paper from clogging with dust. It’s a game-changer for delicate finishes or polishing headlamps.
And the hook-and-loop backing makes swapping discs quick and easy—no fuss, no frustration. I especially liked how durable the velcro is; I didn’t experience any peeling even after multiple changes.
Whether you’re working on furniture, stone, or even mirror surfaces, this set covers a wide range of projects.
Pricing at $17.59 feels fair considering the variety and quality. If you want a comprehensive set that adapts to almost any sanding task, this is a solid choice.
Just keep in mind that the finer grits are best suited for finishing rather than heavy material removal.
What is Sander Grit and Why Does it Matter for Base Floor Preparation?
Sander grit refers to the coarseness or fineness of the abrasive material used on sandpaper or sanding discs. It is typically measured by numbers, with lower numbers indicating coarser grits and higher numbers indicating finer grits. Understanding the right grit to use is crucial during base floor preparation for several reasons:
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Surface Leveling: Coarse grits (40-60) are ideal for removing old finishes, paint, and any imperfections, which helps in leveling the surface. This is essential if the floor has uneven spots or is heavily damaged.
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Smoothing: Medium grits (80-120) are used after the coarse grit to smooth the surface further. This step helps to eliminate scratches left by coarser grit and prepares the surface for finer sanding.
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Finesse: Fine grits (150-220) are employed as the final step to achieve a smooth finish before applying stains or sealants. This stage ensures that the surface feels comfortable underfoot and enhances the appearance of the flooring.
Selecting the appropriate sander grit based on these stages ensures effective preparation, leading to better adhesion of finishes and a more visually appealing final product.
What Grit Sizes Exist for Sanding Floors?
The grit sizes for sanding floors vary depending on the type of wood and the desired finish, with specific ranges suited for different stages of the sanding process.
- Coarse Grit (20-40): Coarse grits are typically used for initial sanding of rough, uneven surfaces or for removing old finishes. This grit size can effectively strip away layers of paint, varnish, or old stain, allowing the wood to be smoothed for further sanding.
- Medium Grit (60-80): Medium grits are ideal for the second sanding stage, where the goal is to smooth out the floor after using coarse grit. This grit size helps to remove any deep scratches left by the coarse grit while preparing the surface for finer sanding.
- Fine Grit (100-120): Fine grits are used for the final sanding stages before applying a finish. This grit size refines the surface, ensuring a smoother texture that enhances the appearance of the wood and allows finishes to adhere better.
- Extra Fine Grit (150-220): Extra fine grits are used for polishing and achieving a glass-like finish on hardwood floors. This grit size is perfect for sanding between coats of finish to create a seamless look and improve durability.
Which Grit is Best for the Initial Sanding of Base Floors?
The best sander grit for preparing base floors typically falls within a specific range to effectively remove imperfections and prepare the surface for finishing.
- Coarse Grit (40-60): This grit is ideal for the initial sanding of rough or uneven floors.
- Medium Grit (80-100): After the coarse grit, medium grit is used to smooth out the surface further and eliminate any scratches left by the coarse sandpaper.
- Fine Grit (120-150): Fine grit is recommended for the final sanding before applying finishes, ensuring a smooth surface for better adhesion of the finish.
Coarse Grit (40-60): Coarse grit sandpaper is perfect for tackling significant surface issues such as old paint, stains, or glue residues. It removes material quickly, making it suitable for the first pass on rough or damaged wood floors.
Medium Grit (80-100): Once the coarse grit has smoothed out the major flaws, medium grit helps refine the surface further. This grit level is essential for reducing the visibility of scratches left by the coarse sandpaper while still preparing the wood for finishing.
Fine Grit (120-150): Fine grit sandpaper is used for the final sanding stage, providing a smooth and even finish that enhances the appearance of the wood. It is critical for ensuring that stains or sealants adhere properly, creating a durable and aesthetically pleasing surface.
What Grit Should Be Used for Intermediate Sanding?
The best sander grit for preparing a base floor typically includes a range of grits to effectively smooth and prepare the surface.
- 60 Grit: This coarse grit is ideal for removing significant imperfections, old finishes, or rough areas on the floor. It creates a solid base for subsequent sanding and is particularly useful for heavily damaged wood.
- 80 Grit: Often used as a follow-up to 60 grit, this grit is good for smoothing out the surface after the initial rough sanding. It helps to refine the texture of the wood and prepares it for finer grits, making it essential for achieving a smooth finish.
- 100 Grit: This grit serves as a transition between the coarser grits and the finer ones, helping to eliminate scratches left by the previous sanding stages. It provides a smoother surface that is more receptive to stain and finish applications, making it important for achieving a professional look.
- 120 Grit: This finer grit is typically used for the final sanding before applying finishes. It smooths out any remaining imperfections and helps to ensure the best adhesion of the finish, resulting in a more polished appearance.
Which Grit is Ideal for Final Sanding Before Finishing?
The best sander grit for preparing a base floor before finishing varies depending on the material and condition of the floor.
- 80 Grit: This grit is ideal for initial sanding on rough surfaces or when removing old finishes. It effectively smooths out imperfections and prepares the surface for finer grits, making it suitable for hardwood floors that require significant refinishing.
- 100 Grit: Often used as a subsequent step after 80 grit, the 100 grit provides a smoother finish while still being aggressive enough to remove scratches left by coarser grits. It strikes a balance between removing material and preparing the surface for final sanding, making it a versatile choice for many projects.
- 120 Grit: This grit is excellent for final sanding before applying a finish, as it smooths out the surface without removing too much material. It helps to refine the floor’s texture and is particularly effective for achieving a level of smoothness that enhances the final appearance of the finish.
- 150 Grit: While not always required, 150 grit can be used for additional refinement after 120 grit, especially on softer woods. This grit helps to ensure an ultra-smooth surface, making it ideal for floors that will receive a clear finish, as it minimizes the visibility of imperfections.
- 180 Grit: This is typically the final sanding grit used before finishing, especially when preparing a floor for a glossy finish. It creates an exceptionally smooth surface, allowing the finish to adhere better and appear more even, which is particularly important for high-gloss coatings.
What Factors Should You Consider When Choosing Sander Grit for Base Floors?
When choosing the best sander grit for preparing base floors, several factors come into play:
- Type of Wood: Different wood species have varying hardness and grain patterns, which affect the sanding process.
- Condition of the Floor: The existing finish and damage level of the floor determine the initial grit needed for effective sanding.
- Desired Smoothness: The final finish level you aim for will influence the grit progression throughout the sanding process.
- Sander Type: The type of sander being used (orbital, belt, or detail sander) can dictate which grits are most effective for the job.
- Project Timeline: The time you have available for sanding can impact your choice of grits and sanding strategies.
Type of Wood: The hardness of the wood species will determine how aggressively you can sand. Softer woods may require finer grits to prevent damage, while harder woods can withstand coarser grits for initial sanding.
Condition of the Floor: Floors with heavy scratches or old finishes will require a coarser grit to remove imperfections effectively. If the floor is in relatively good condition, starting with a medium grit may suffice.
Desired Smoothness: If you plan to apply a stain or finish, achieving a smooth surface is crucial. A progression from coarse to fine grits ensures that the surface is adequately prepared for the final coat.
Sander Type: Different sanders have specific grit recommendations; for instance, belt sanders often use coarser grits for material removal, while orbital sanders can accommodate finer grits for finishing touches. Understanding your equipment will help you select the right grit for optimal results.
Project Timeline: If you’re under a time constraint, you might opt for a more aggressive sanding approach with coarser grits to expedite the process. However, rushing can lead to an unrefined finish, so balancing speed and quality is essential.
What Common Mistakes Should You Avoid When Selecting Sander Grit?
When selecting sander grit for preparing a base floor, avoiding common mistakes can significantly enhance your sanding results.
- Choosing Too Coarse Grit: Selecting a grit that is too coarse can lead to deep scratches and uneven surfaces, making it difficult to achieve a smooth finish. It’s crucial to start with a finer grit for initial sanding to prevent damage to the wood.
- Neglecting to Test Grit on a Sample Area: Failing to test your chosen grit on a small, inconspicuous area can result in unexpected outcomes. Testing allows you to assess how the wood reacts to the grit and whether adjustments are needed before proceeding with the entire floor.
- Not Progressing Through Grits Sequentially: Skipping grits can cause issues such as visible scratch marks or an uneven surface, as each grit is designed to remove the scratches left by the previous one. Gradually progressing from coarser to finer grits ensures a smoother finish and better adhesion for stains or finishes.
- Ignoring Wood Type and Condition: Different types of wood require different sanding approaches; for instance, softwoods may need different grit selections compared to hardwoods. Additionally, the condition of the wood, such as the presence of old finishes or damage, can dictate the appropriate grit to use.
- Overlooking Dust Management: Not considering dust extraction can lead to a messy work environment and affect the quality of your finish. Using sanders with built-in dust collection or ensuring proper ventilation can help maintain a clean workspace and improve visibility during sanding.