Microcement in Los Angeles: What It Costs, Where It Works, and Where It Fails
Microcement is a polymer-modified cement coating applied 2 to 3 millimeters thick over an existing surface. It works because it goes over what is already there instead of replacing it. It fails when it is installed on something that moves.
This comprehensive guide covers what drives microcement pricing in Los Angeles, how a correct installation is built, and the four specific situations where we advise clients to use something else.
What is microcement?
Microcement is a cement-based coating mixed with acrylic or epoxy polymers, applied by hand in multiple thin layers over a carefully prepared, primed substrate. Total build-up is about 2 to 3mm. There are no grout lines and no visible joints anywhere in the finished surface.
It is a coating, not a flooring material. That fundamental distinction drives everything else in this article.
How microcement is installed
A correct installation is five stages, not one:
- Substrate prep: Existing tile is thoroughly cleaned, deglossed, and any loose or drummy pieces are cut out and filled with high-strength patch compound.
- Primer: A specialized bonding primer matched strictly to the substrate. Tile takes an entirely different primer than drywall or plywood.
- Mesh and base coats: Heavy-duty fiberglass mesh is embedded in the first base coat over every single seam, grout line, expansion joint, and substrate transition. Two base coats minimum are required.
- Finish coats: Two passes of fine-grade microcement, trowelled and sanded between passes. This is where the subtle texture and organic color depth live.
- Sealing: Two to three coats of high-performance polyurethane sealer. Water-based for most interiors, matte or anti-slip for wet areas.
Skip any one of those steps, and the finish will show it within a year.
What does microcement cost in Los Angeles?
There is no flat rate, and any contractor quoting one over the phone has not seen your substrate. Microcement is priced per project because the preparation is the variable, not the material.
Here is what actually moves the number:
1. Size and continuity of the area
Larger continuous areas cost less per square foot than small, broken-up rooms. A single open floor is fast and efficient. Four small rooms with doorways, thresholds, shower niches, and tight internal corners require the same square footage but vastly more intricate hand trowel work.
2. Substrate condition
This is usually the biggest swing in price. A flat, sound concrete slab requires minimal prep. In contrast, cracked, uneven, or drummy tile requires cutting out hollow areas, filling voids, grinding, and leveling before a single coat of microcement can be laid.
3. Scope: floor, walls, or shower
Floors only is the simplest scope. Adding walls increases total surface area and requires precise corner and junction detailing. A shower is the most involved because full waterproof integrity must be guaranteed underneath.
4. Whether waterproofing has to be rebuilt
If the existing membrane is intact and sound, it stays. If it has to be replaced or rebuilt, that is a separate scope beneath the microcement that changes the project timeline and labor meaningfully.
5. Finish grade and color
A fine, near-uniform architectural finish takes more passes and extensive hand-sanding than a heavily mottled, rustic aesthetic. Custom color matching also adds testing time.
6. Access and building constraints
A ground-floor single-family home and a fourteenth-floor high-rise condo with restricted elevator windows and limited work hours are not the same job, even with identical square footage.
The honest answer: microcement often lands competitively against tile on total project cost, because there is no demolition and no debris disposal. But that depends entirely on what is underneath. We price it after walking the space, not before.
Where microcement works best in LA homes
Condos and high-rise apartments
This is the strongest case. Microcement adds only about 3mm of total height, so door clearances, marble thresholds, and kitchen appliance heights stay exactly as they are. There is almost no demolition, which means no dumpster, no jackhammer, and far less HOA friction. In Westwood, Brentwood, and Santa Monica buildings with restricted work hours and reserved elevator access, that changes the entire character of the project.
Over existing tile
Microcement bonds tenaciously to sound, well-bedded tile after priming. Skipping demolition removes the two worst parts of a traditional tile remodel: hauling disposal and the nasty surprise of discovering a rotted subfloor mid-project.
Bathroom floors and non-shower walls
Seamless surfaces have zero grout to discolor, stain, or mildew. For homeowners who are tired of scrubbing stained grout lines with harsh chemicals, that is usually the entire reason they call us.
Kitchen and bathroom feature walls
Microcement applied over drywall gives a continuous, stone-like aesthetic with no complicated tile cuts, no plastic trim pieces, and no outside-corner details to get wrong.
Where microcement fails
We are intentionally direct about this, because installers who aren't will cost you thousands of dollars:
- Over a moving substrate: Springy plywood floors, unbraced subfloor joists, or a concrete slab with an active structural crack will telegraph through. Microcement does not bridge movement.
- As a standalone waterproofing layer: Microcement is not waterproof on its own. A dedicated sheet or liquid membrane must go underneath it in any shower or wet area. If a contractor tells you the topcoat sealer handles the waterproofing, walk away immediately.
- Outdoors in full sun: Intense UV exposure degrades most interior-grade polyurethane sealers over time. Exterior-rated systems exist, but they are a completely different product with a separate installation specification.
- Where a perfectly uniform factory finish is expected: Microcement is hand-trowelled by a human craftsman. Tonal variation and movement are natural hallmarks of the material, not defects. Always inspect a large physical sample before signing an agreement.
How long does microcement last?
A properly installed and sealed microcement floor lasts 10 to 20 years. The cementitious coating is the durable, permanent part. The sealer is the sacrificial wear layer, and in a wet bathroom it should be re-coated every 3 to 5 years. Re-sealing is a clean process that does not require removing or replacing the existing surface.
How to maintain microcement
- Clean with a neutral pH cleaner (mild soap and warm water).
- No acidic cleaners, no bleach, and no abrasive scrub pads.
- Wipe standing water in wet areas rather than letting pooling water sit at corners and transitions.
- Re-seal on schedule instead of waiting for visible sealer wear or moisture penetration.
Frequently asked questions
How much does microcement cost in Los Angeles?
It's priced per project. Cost depends on the size and layout of the area, the condition of the existing substrate, whether walls and showers are included, whether waterproofing has to be rebuilt, and the finish grade you choose. A walkthrough is the only way to price it accurately.
Is microcement cheaper than tile?
It depends on the substrate. Microcement removes demolition and disposal costs, which often closes the gap or reverses it. Where heavy prep is needed, that advantage shrinks.
Can microcement be installed over existing tile?
Yes. It is the most common application in remodels. The tile must be sound and well-bonded. Loose tiles are cut out and filled first, and fiberglass mesh is embedded over the grout lines.
Is microcement waterproof?
No. The sealer is water-resistant. A separate waterproofing membrane is required beneath the microcement in showers and wet areas.
Does microcement crack?
Hairline cracking happens when the substrate underneath moves. On a rigid concrete slab with mesh reinforcement at joints and transitions, cracking is rare.
How thick is microcement?
About 2 to 3mm total, including base and finish coats. Doors, thresholds, and appliance heights usually do not need adjusting.
Can I install microcement myself?
No. Trowel technique and timing between coats determine the result. A failed application generally has to be ground off entirely before anything else can go down.
Considering Microcement for Your Home?
Aluna Construction is a licensed, bonded, and insured renovation contractor working in Westwood, Brentwood, Santa Monica, and Beverly Hills. If you are weighing microcement for a bathroom or floor, we will walk the space and tell you straight whether the substrate supports it, and what it will take.