St. George Home Services

Concrete coatings · Inside the house

Interior concrete floor

Laundry rooms, utility rooms, workshops, casitas and anywhere else the slab is the floor. Same preparation, smaller room, and the masking matters more because everything is close.

One flat fee to find out what is wrong. You are told it on the phone before anyone is dispatched, and it comes off the job if you hire us. Read our Plain Terms

A garage with a brown and tan flake floor, a wall-hung tankless water heater and utility sink on the back wall, a white door beside them and two small framed pictures
The floor goes under and around the equipment rather than stopping at it. This is the same garage as the bare slab further down.

What the work is

Interior concrete floors away from the garage are usually smaller jobs with more edges. A laundry room is mostly perimeter. That changes the labor mix — less machine time, more hand work — and it changes what the finished job is judged on, which is the lines rather than the field.

Dust control is the part that matters indoors. Grinding concrete inside a finished house without extraction at the machine puts a fine mineral dust through the whole building, and it gets everywhere. Extraction is not an upgrade.

Appliances and fittings have to come out, and going back in is part of the schedule rather than an afterthought. We will tell you what has to move and what the room is unusable for.

The slab still gets tested. An interior slab on grade has the same relationship with the ground as a basement one does.

What is included

  • A moisture test on the slab, with the reading written down
  • Grinding with dust extraction at the machine
  • Hand work to the perimeter, around pipework and under fittings
  • Masking the walls, cabinets and anything adjoining
  • A clear account of how long the room is out of use

What is not

  • Disconnecting or reconnecting appliances and plumbing. That is coordinated separately
  • Making good paint or drywall that was already damaged
  • Working around an appliance that cannot be moved. It comes out or the floor stops short of it, and you choose which

What to ask anyone quoting this, us included

  • Is there extraction on the grinder, and where does the dust go?
  • What has to be out of the room, and who moves it?
  • How long is this room unusable?

What we can show you in writing

Every line traces to a document we read in full. The number after a sentence points to the research below.

  • ASTM F2170 measures the internal relative humidity of a slab using probes set in holes drilled to 40 per cent of the slab depth, and has been displacing calcium chloride testing as the preferred method since 2002.1
  • ACI 302.2R governs concrete slabs that receive moisture-sensitive flooring. The vapor retarder beneath a slab must be less permeable than the covering above it, or a moisture-related flooring failure is possible; ACI 302.2R-06 suggests materials of 0.01 perms or less where the covering is extremely sensitive.1
  • Concrete substrates must be mechanically prepared to remove cement laitance, existing coatings and curing compounds, and to achieve a profile that is clean, dry and free of dirt, grease and oil. Diamond grinders create that profile and remove high spots and coatings; shot blasting is described as the industry standard for surface preparation of concrete.1

Where this comes from

Every line above traces to a document we read in full. The number after a sentence points to the research below; hover it for the section. If you find a line wrong, tell us and we will fix it and say so.

  1. Concrete coatings research, September 2026 Compiled from ICRI Guideline 310.2R-2013 on concrete surface preparation, the ASTM moisture test standards F2170, F1869 and D4263, ACI 302.2R and NRMCA CIP 29 on slabs and vapor retarders, Sika's published surface preparation guide, Sherwin-Williams product literature on polyaspartic chemistry, and the Utah Geological Survey and Utah DEQ material already cited in the environment research. 3 sections cited. Hover a number above for the section.

The rest of inside the house

  • Basement floor coating

    A finished floor rather than a subfloor waiting for one. Moisture gets tested first, and that is not optional below grade.

The quote is the number. There is no second number.

Call (801) 680-6859

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