How to Remove Slate Flooring: Easy DIY Methods

Slate floors look beautiful right up until the year you decide to replace them. Then you discover that the tiles are mortared into a 1.5 inch bed of cement, the subfloor is buried under dust, and the chisel-and-hammer plan you sketched on Saturday morning is going to consume the whole weekend. Knowing how to remove slate flooring efficiently means understanding the substrate, picking the right tools, and committing to dust control before the first tile cracks. This guide walks through the proven approach used by demolition pros, scaled down for a confident DIY homeowner.

Assess the Installation Before You Start

Not all slate floors come up the same way. A floating slate-look LVT will pop apart in 30 minutes. A traditional natural slate floor mortared over concrete can take a full day per 100 square feet. Lift a vent register or door threshold to see what you’re dealing with:

• Thinset over concrete: Standard 1990s-present install. Tiles 3/8 inch, thinset bed 1/4 inch. Manageable with hand tools or a small jackhammer.
• Mud-set over wire lath: Common in custom and high-end installs from the 1970s-2000s. Mortar bed 1 to 1.5 inches over wire mesh. Power tools mandatory.
• Mortared over wood subfloor: Older or non-standard install. Demolition usually destroys the subfloor too — budget for replacement.
• LVT slate-look click-lock: Modern dry-lay vinyl. Just unclick and stack.

Knowing which install method was used drives the tool list, time estimate, and disposal volume.

The Tool List That Actually Works

Trying to remove a traditional slate floor with a hammer and cold chisel is possible but punishing. The right tools cut the labor by 70 percent or more:

• Electric jackhammer or rotary demolition hammer: Bosch Brute Turbo or Makita HM1307CB. Rentable at Home Depot for $75 to $110 per day.
• Tile chisel attachment (3 inch flat): Specifically shaped to slide under tiles and lever them up without destroying the subfloor.
• Floor scraper attachment (6 inch wide): For scraping residual thinset after tile removal.
• Eye protection, hearing protection, N95 or P100 respirator: Slate dust contains silica.
• HEPA shop vacuum: Standard shop-vacs blow fine dust through their exhaust. HEPA is non-negotiable.
• Pry bar, claw hammer, masonry chisel: For edge work and stubborn tiles.
• Heavy-duty contractor bags or 5-gallon buckets: Slate is heavy. Bags rated for 50+ lb.

Total rental and consumable budget runs $150 to $250 for a 200 square foot job. Buying the tools outright costs more than hiring a pro.

Dust Control Before Demolition

Silica dust from slate and mortar is the health hazard people underestimate. OSHA permissible exposure limits are 50 micrograms per cubic meter — a single hour of unprotected slate demolition can exceed that by 20-fold. Set up containment before lifting the first tile.

Hang 6 mil plastic sheeting across doorways with painter’s tape and a wooden strap to hold the bottom edge down. Tape over HVAC supply and return grilles. Open a window in the work zone with a box fan blowing outward — this creates negative pressure so airborne dust exits the room rather than flowing into the rest of the house. Wear a P100 respirator with replaceable cartridges, not a standard dust mask.

Step-by-Step Removal Process

Once containment is set up and tools are staged, the demolition itself follows a repeatable pattern:

1. Score the grout lines: Use an oscillating multi-tool with a carbide grout blade to cut the grout around the first tile. This isolates it from neighbors.
2. Crack the first tile: Hit the center with the jackhammer set to chipping mode (no hammer drill rotation). The tile shatters into 3 to 5 pieces.
3. Lift fragments with the chisel attachment: Slide the flat chisel between tile and thinset bed. Lever upward firmly. Most fragments release cleanly.
4. Bag debris as you go: Sit a contractor bag next to the work zone and dump tile pieces directly. Don’t let debris pile up — it doubles handling time.
5. Work in 4 by 4 foot sections: Complete each section fully before moving on. Lifting tiles plus removing thinset in the same area is faster than sweeping back and forth.
6. Vacuum dust every 20 minutes: Keeps the chisel visible and reduces airborne particulates.

Pace yourself. Most homeowners average 50 to 80 square feet per hour on standard thinset installs and 25 to 40 sq ft per hour on mud-set installs.

Removing the Mortar Bed

Lifting tiles is only half the work. The mortar or thinset bed left behind has to come up before you can install anything new. Use the 6 inch floor scraper attachment on the demolition hammer, working at a low angle to skim the mortar without gouging the subfloor.

On concrete subfloors, expect to need a follow-up grind with a concrete grinder fitted with a diamond cup wheel to bring the surface to a flat, paintable or tileable state. Rent a 7 inch handheld grinder with dust shroud for $60 to $90 per day. Anything you intend to tile over needs the subfloor flat within 1/8 inch over 10 feet.

Disposal Cost and Logistics

Slate is heavy. A 200 square foot floor produces roughly 2,500 to 3,500 pounds of debris including mortar bed. That’s beyond standard curbside trash limits in every US municipality I’ve worked in.

• 10-yard dumpster rental: $300 to $500 for a week. Handles up to 600 sq ft of slate.
• Bagged disposal at construction debris transfer station: $80 to $150 per pickup truck load.
• Hiring a junk removal service: $400 to $700 for the same volume.

Reusing the slate is rarely worth the labor — most tiles crack during removal. If your tiles are unusually intact and historically significant (Welsh slate, hand-cut Vermont slate), salvage is possible but requires careful chiseling rather than power demolition.

When to Call a Pro

DIY removal works on small kitchens, bathrooms, and entries up to about 200 square feet. Beyond that, the physical toll and time investment usually justify hiring out. Professional demolition crews charge $3 to $7 per square foot for slate removal including disposal, which often saves a week of weekend labor and a chiropractor visit. If your slate sits over a wood subfloor that needs preserving, hire a pro — the chisel work demands experience to avoid wrecking the boards beneath.