Best Sandpaper for Hardwood Floor Refinishing

Refinishing hardwood floors is a significant investment, and choosing the right abrasives makes the difference between professional results and costly mistakes. This guide covers the three leading abrasive manufacturers and their products specifically designed for floor sanding machines: drum sander sheets, edger discs, and buffer screens.

Why Choosing the Right Sandpaper Matters

Not all sandpaper performs equally on floor sanding equipment. Drum sanders, edge sanders, and buffers operate at different speeds and pressures, requiring specifically engineered abrasive coatings and backing materials. Using the wrong grit sequence or substrate type can result in:

• Uneven sanding that requires additional passes and material
• Swirl marks and orbital patterns that are visible after finishing
• Premature wear that shortens abrasive life and increases costs
• Machine loading and reduced cutting efficiency
• Damage to the wood if aggressive grits are applied incorrectly

Professional contractors and serious DIYers invest in quality abrasives because they understand that floor preparation determines the final finish quality.

Drum Sander Sheets: 8×19.5"

The 8×19.5" drum sander sheet is the workhorse of floor refinishing. This size fits Clarke DU-8, EZ-8, Hiretech HT8, and similar rental machines. The drum sander makes the first and most aggressive passes in the grit sequence, so sheet quality directly impacts results.

Virginia Abrasives Drum Sander Sheets

Virginia Abrasives offers a complete line of open-coat drum sheets in grits 36, 50, 60, 80, and 100. Their open-coat design reduces machine loading compared to closed-coat alternatives, which means:

• Better dust extraction from the machine's vacuum
• Longer sheet life per pass
• More consistent sanding action across the entire sheet
• Superior results on softwoods and veneered floors

The 36-grit Virginia Abrasives sheet is particularly respected for its aggressive cutting action on old finishes. Contractors report that these sheets remove polyurethane faster than competitors while maintaining wood surface quality.

Norton Drum Sander Sheets

Norton's abrasive products are engineered for both speed and longevity. Their drum sheets feature premium aluminum oxide with consistent mineral distribution. The backing is designed to withstand the lateral forces on the drum without stretching, which maintains flatness across passes.

Norton is a strong choice when budget allows, offering the most consistent results across the grit sequence. Their 60-grit sheet is often preferred for the initial finishing pass after aggressive grinding.

3M Drum Sander Sheets

3M's floor sanding abrasives use their proprietary adhesive systems and mineral formulations. These sheets typically cost between Virginia Abrasives and Norton. They offer good balance between performance and price, making them popular with rental companies.

The 3M sheets perform well on both hardwoods and engineered floors, though some contractors report slightly shorter life compared to premium Virginia Abrasives for aggressive grits.

Drum Sander Sheet Comparison

Brand	Coat Type	Grit Range	Best For	Price Tier
Virginia Abrasives	Open-coat	36–100	Aggressive cuts, long life, dust control	$
Norton	Closed-coat (Premium)	36–120	Consistent finish, flat backing, precision	$$$
3M	Closed-coat	36–120	Balanced performance, wider grit range	$$

Floor Sanding Edger Discs: 7"

The 7-inch edger disc is used on edge sanders (typically Clarke Super 7R or similar) to sand the perimeter of rooms where the drum sander cannot reach. These discs must be durable enough to handle the orbital motion and powerful enough to match the drum sander's cutting pace.

Virginia Abrasives Edger Discs

Virginia Abrasives 7" edger discs are available in both PSA (pressure-sensitive adhesive) and hook-and-loop formats. The open-coat design mirrors their drum sheets, providing excellent dust clearance and long service life. These discs are available in the full grit sequence from 36 to 120.

The center hole accommodates both 7/8" and 5/16" spindle diameters with the appropriate bushing, making them compatible with most rental edge sanders.

Norton 7" Edger Discs

Norton edger discs feature a closed-coat design that provides finer finish quality for mid and high grits (80–120). If your goal is a mirror-smooth surface ready for stain, Norton discs in 100–120 grit produce superior results compared to open-coat alternatives.

3M Floor Sanding Discs

3M offers a good balance for edger work. Their hook-and-loop system is easier to change than PSA, which matters when you're swapping between aggressive and finishing grits frequently during a job.

Buffer Screens and Pads

After the drum and edger sanding, buffer screens are used to perform a final fine-grit sanding pass. Screens are different from sandpaper—they are mesh-backed, open-structure abrasives that create minimal dust and provide a smooth surface for finishing.

Buffer Screen Grits and Purpose

Buffer screens are typically used in 80–150 grit and serve a specific purpose: they burnish the surface to accept stain evenly and prepare the wood for polyurethane application. A proper buffer screening pass reduces adhesion issues and ensures uniform finish color.

• 80–100 grit: Used on floors with shallow scratches or minor damage; provides a final aggressive pass
• 120 grit: The most common choice; balances surface smoothness with preparation time
• 150+ grit: For ultra-fine finishes; used primarily in high-end residential or commercial applications

Virginia Abrasives Buffer Screens

Virginia Abrasives manufactures buffer screens with a heavy cotton mesh backing designed for the specific oscillation rate of buffer machines. The 120-grit screen is their most popular product and is recommended for the final preparation pass in the NWFA grit sequence.

Norton and 3M Alternatives

Both Norton and 3M offer buffer screens, though Virginia Abrasives remains the industry standard for this particular product category due to superior dust control and consistent results.

Standard Floor Sanding Grit Sequence

The National Wood Flooring Association (NWFA) recommends a grit sequence that prepares the surface for finishing while removing all traces of old finish or surface damage. The standard sequence for most hardwood floors is:

Step	Machine	Grit	Purpose
1	Drum Sander	36	Remove old finish and surface damage
2	Drum Sander	60	Remove scratches from 36-grit pass
3	Drum + Edger	80	Final aggressive cut; uniform color
4	Edger + Buffer	100	Final edger pass for perimeter
5	Buffer with Screen	120	Surface preparation and burnishing

For water-based polyurethane finishes, some contractors add a final 150-grit screen pass to maximize smoothness, since water-based finishes are more sensitive to surface texture than oil-based polyurethane.

Machine Compatibility and Backing Materials

Drum sander sheets must be the correct size and backing material for your machine. The most common rental machine is the Clarke DU-8, which uses 8×19.5" sheets with a standard rubber or fabric backing.

Backing Material Considerations

• Fabric Backing: More flexible, better for slightly warped floors; most common for rental machines
• Rubber Backing: More rigid, maintains flatness; preferred by contractors for precision work
• Weight: Heavier backing materials resist stretching but can wear the drum faster if not properly aligned

Compatibility with Popular Rental Machines

Machine Model	Sheet Size	Recommended Backing	Best Abrasive
Clarke DU-8	8×19.5"	Fabric	Virginia Abrasives (open-coat)
Clarke EZ-8	8×19.5"	Fabric or Rubber	Norton or Virginia Abrasives
Hiretech HT8	8×19.5"	Rubber	Norton Premium

Choosing Abrasives: Professional vs DIY Considerations

The choice between Virginia Abrasives, Norton, and 3M depends on your priorities, budget, and expertise level.

Choose Virginia Abrasives if:

• Cost is a significant factor and you want the best value
• You have heavy dust extraction capability (their open-coat design requires it)
• You're refinishing multiple rooms and need long abrasive life
• You're using rental machines with older vacuum systems

Choose Norton if:

• You prioritize finished surface quality and are less cost-sensitive
• You have professional equipment with excellent vacuum extraction
• You need the widest grit range for unusual floor conditions
• You want maximum consistency across the entire grit sequence

Choose 3M if:

• You want a middle-ground option between cost and performance
• You prefer hook-and-loop attachment systems (faster disc changes)
• You value availability at local tool rental centers
• You're working with engineered or specialty floors

Complete Abrasives Shopping List for a Typical Room

For a typical 300–400 sq ft room refinishing project using a rental drum sander and edger, this shopping list covers all passes:

• 3× 8×19.5" drum sheets in 36-grit (primary pass)
• 2× 8×19.5" drum sheets in 60-grit (secondary pass)
• 2× 8×19.5" drum sheets in 80-grit (uniform color pass)
• 3× 7" edger discs in 80-grit
• 2× 7" edger discs in 100-grit
• 1–2× 120-grit buffer screens
• 1× 150-grit buffer screen (optional, for water-based finishes)

Exact quantities depend on floor condition, machine efficiency, and your technique. Hard maple and oak require more aggressive passes than softer woods like pine or fir.

Storage and Care of Abrasives

Sandpaper and abrasive discs should be stored in a cool, dry place. Humidity can affect adhesive integrity and cause backing material warping. Keep PSA (pressure-sensitive adhesive) discs separated from hook-and-loop discs to prevent accidental adhesion.

Drum sheets should remain in their protective sleeves until use. Once opened, they can be rolled loosely and stored vertically. Never fold or crease sheets, as this creates stress lines that lead to premature failure during sanding.