Tile Removal and Floor Prep

Containing dust and debris

Breaking out tile throws fine dust and sharp chips, and old mortar beds throw more. Containment gets planned before the first tool starts: plastic sheeting taped at doorways, a zip door on the main path, supply vents covered and returns blocked so dust does not ride the ductwork. Cutting or grinding mortar and concrete releases silica dust, so chippers and grinders need vacuum shrouds with HEPA filtration. A household shop vacuum is not enough.

Tile alone, or tile and mortar bed?

Sometimes the tile and thinset pop off a sound slab and the job is scraping and grinding. In other houses the tile sits in a thick mortar bed, which may be well bonded or may be hollow with wire lath inside. A small test area answers the question. Tapping with a hammer or dragging a chain across the surface finds hollow zones.

The bed comes out when it is loose, cracked through or too thick for the new floor height, and it stays when it is solid and the height works. Removing a bed also lowers the floor, so doors and adjoining floors get rechecked afterward.

Old resilient flooring and adhesive: test before disturbing

Older sheet vinyl, vinyl tile and the black cutback or mastic adhesive under them can contain asbestos, and nobody can tell by looking. If the material is old or its age is unknown, a sample goes to an accredited lab before any sanding, grinding or scraping, since those actions release fibers. A positive result changes the plan. The options include encapsulation, hiring a licensed abatement contractor, or leaving the layer undisturbed beneath a new assembly. Tile work waits for that decision, and anyone planning a weekend of scraping should hold off until the result is back.

Damaged subfloor

Once the tile is up, a plywood or board subfloor gets inspected for dark staining, soft spots, delaminated layers, popped nails and sag between joists. Soft or rotted subfloor is cut back to solid framing and replaced with material of matching thickness, because a patch that sits high or low telegraphs through the new floor.

The cause has to be found first. A plumbing leak, a failed shower pan or a damp crawl space will wreck the next floor as well. If the framing deflects more than the tile system allows, stiffening comes before tile, and the industry standards for tile over wood set the criteria. Termite damage and major framing repair belong to other trades.

Scraping and grinding the base

After demolition the surface carries ridges of thinset, streaks of adhesive and paint drips. A long-handled scraper handles soft residue. On concrete, a floor grinder with a diamond cup wheel flattens hard thinset ridges, with the same dust controls as demolition. Mastic that gums up a wheel needs its own removal method, and solvent strippers can interfere with the next bond, so the product instructions decide.

Patching and leveling

Patching follows cleaning and priming. Small chips and low spots take a cementitious patch, and wider low zones take a self-leveling underlayment, with primer and a dam at doorways and drains so the pour stays where it belongs. Skipping the primer lets a dry slab pull water out of the leveler. Every product has a depth range and a cure time, and both are checked before tile goes on.

Checking moisture

Concrete can look and feel dry while moisture vapor still moves up through it. The setting and flooring product makers specify the test, and common ones are the calcium chloride test and in-slab relative humidity probes. A plastic sheet taped down overnight only hints at a problem and does not measure anything.

Protecting the rooms next door

Adjoining rooms catch what the work area throws. Carpet and hardwood get floor protection, doors get sealed, and furniture and cabinets are moved or wrapped. The path to the exit is covered with hard board, since paper tears under wheeled buckets. Baseboards and door casings come off carefully or get masked, because chipping tools wander. Floor registers and plumbing stub-outs are capped so debris does not drop in, and the heating and cooling system stays off while dust is in the air.

Disposal and hauling

Tile and mortar are heavy, and even a small bathroom floor fills many bags. Pack them in sturdy bags or buckets, do not overfill them, and keep clean scrap apart from dust and slurry. Hauling goes to a facility that accepts construction debris. A dumpster on a driveway or street may need a permit, so ask the city's public works office. Material confirmed as asbestos-containing follows separate handling rules, and weight on stairs or upper floors is a real limit.

What a surface ready for tile looks like

A floor ready for tile looks plain. It is bare, sound and clean, with no ridges, shine, wax or paint, and no dust that rubs off on a palm. A straightedge shows it flat to the tile maker's tolerance. Low spots are filled and cured, cracks are classified and treated, drains and penetrations are protected, and moisture readings sit within the product's limits. The new floor height, meaning tile plus mortar, also lines up with the room next door.

What the demolition and prep scope lists

A scope that holds together lists the area to be protected, what is being removed, how debris leaves, the repairs expected after the surface is exposed, and how the base will be cleaned and checked. It also names what falls to someone else, such as plumbing leaks, structural movement, termite damage, major framing, hazardous materials and electrical relocation. The final list is confirmed once the floor is open.

Setting the replacement tile follows the practices on the residential and bathroom and shower tile pages.

Distance from the shop

The Compton shop is roughly 6 miles by straight line from a Los Angeles city reference point. That is a map distance and not a driving estimate. Removal work is quoted for Los Angeles, Compton, Long Beach, Downey and Carson, and the slab, crawl space or framed floor in each house is judged after access is opened and a test area is cut.

Prep scope in five lines

Layouts for the new floor can be compared once the base is known: try a layout on the Pattern Bench.