So you’ve got a loft. Exposed brick, high ceilings, maybe a bit of steel beam action. It’s raw, it’s urban, and honestly? It’s begging for a floor that doesn’t whisper—it roars. Microcement and polished concrete are the go-to choices for that industrial-chic vibe. But here’s the kicker: you can actually do it yourself. Well, mostly. Let’s break it down, warts and all.
I’m not gonna lie—this isn’t a weekend project. It’s more like a gritty, messy, rewarding week-long dance with concrete. But if you’ve got the patience and a tolerance for dust, you can save serious cash. And the result? A seamless, monolithic floor that feels like it’s been there forever. Let’s dive in.
What’s the Deal with Microcement vs. Polished Concrete?
First things first—are these the same thing? Nope. They’re cousins, sure, but with different personalities. Microcement is a thin-layer coating (like 2-3mm thick) applied over existing floors. It’s flexible, fast-curing, and works on tiles, wood, or old concrete. Polished concrete, on the other hand, is the actual concrete slab—ground down, honed, and sealed. It’s thicker, harder, and more permanent.
For lofts, both are killer. But your choice depends on your subfloor and your tolerance for DIY chaos. Here’s a quick cheat sheet:
| Feature | Microcement | Polished Concrete |
|---|---|---|
| Thickness | 2-3 mm | 5-10 mm (grind depth) |
| DIY Difficulty | Medium (skill with trowel) | High (requires grinder rental) |
| Cost per sq ft | $4-8 | $2-5 (DIY) / $8-15 (pro) |
| Durability | Good (sealant needed) | Excellent (hard as rock) |
| Best for | Over existing floors | New slabs or exposed concrete |
Honestly, if you’re in a loft with a concrete subfloor already, polished concrete is the no-brainer. But if you’re covering up ugly tiles or creaky wood, microcement is your hero.
Why Loft Lovers Are Obsessed
There’s something about a seamless floor that just works in a loft. No baseboards, no transition strips—just one continuous surface that makes the space feel bigger. It’s like the floor is breathing. And the color? You can tint it—charcoal, warm gray, even a soft beige. But most loft dwellers go for that raw, almost dusty gray. It catches light differently at every hour.
Another thing? Underfloor heating. Both microcement and polished concrete are thermal sponges. They absorb heat and radiate it slowly. In a loft with drafty windows, that’s a game-changer. You’ll walk barefoot in January and not flinch.
The DIY Microcement Route: Step-by-Step (ish)
Alright, let’s get our hands dirty. Microcement is sold in kits—usually a base coat, a top coat, and a sealer. You’ll also need a steel trowel, a mixer, and a lot of patience. Here’s the rough flow:
- Prep the floor – Clean it like your life depends on it. No dust, no grease. Prime it with a bonding agent.
- Mix the base coat – Follow the ratio exactly. Too wet? It’ll crack. Too dry? It won’t stick.
- Apply the first layer – Trowel it on thin—like 1mm. Work in small sections. It sets fast, so no coffee breaks.
- Wait 4-6 hours – Then sand lightly. You’ll see why they say “dust is your new roommate.”
- Second coat – Same process, but maybe a different direction for texture. Let it cure overnight.
- Seal it – Two coats of polyurethane or epoxy. This is where the magic happens—it goes from matte to satin.
Pro tip: Don’t skimp on the sealer. I’ve seen DIYers skip a coat and end up with stains from a dropped wine glass. Seal it twice, maybe three times if you’re paranoid.
Common Microcement Mistakes (Learn from My Pain)
I once tried microcement over a wooden subfloor without enough primer. The next day? Cracks everywhere. Like a spiderweb. So yeah—prime, prime, prime. Also, don’t rush the drying. Microcement is a diva; it needs its beauty sleep between coats.
Another thing—temperature matters. If your loft is cold (under 50°F), the cement won’t cure right. Wait for a warm spell, or crank up the heat.
Polished Concrete: The Heavy Lifter
If you’ve got a concrete slab already, polished concrete is the ultimate DIY flex. But let’s be real—it’s loud, dusty, and physically demanding. You’ll need to rent a concrete grinder (a walk-behind model, not a hand-held toy). And you’ll need diamond grinding pads—coarse, medium, fine, and super fine.
Here’s the process in a nutshell:
- Grind with 30-grit – This removes any coatings and levels the surface. Expect a dust storm. Wear a respirator.
- Grind with 80-grit – Smooths out the scratches. You’ll start seeing a sheen.
- Grind with 150-grit – Now we’re talking. The floor starts looking like stone.
- Apply a densifier – This chemical hardens the concrete. Let it soak in.
- Polish with 300-grit and up – Go up to 800 or 1500 for a mirror-like finish. Or stop at 400 for a matte look.
- Seal with a penetrating sealer – No wax, no film. Just protection.
Honestly, the hardest part is the grinder. It’s heavy, and if you’re not careful, you’ll gouge the floor. Practice in a closet first. And for the love of all things holy, rent a vacuum attachment. The dust is biblical.
Color and Aggregate: Make It Yours
One thing polished concrete offers that microcement doesn’t? Exposed aggregate. If you grind deep enough, you’ll reveal the little pebbles and sand inside the concrete. It’s a beautiful, organic look—like the floor has a secret history. You can also add a stain or dye after grinding. I’ve seen lofts with a charcoal stain that looks almost black. Dramatic? Yes. Gorgeous? Absolutely.
Tools You’ll Need (And a Few You Won’t)
Let’s talk gear. For microcement, you’ll need:
- Steel trowels (a finishing trowel and a margin trowel)
- Mixing paddle and drill
- Sandpaper (100-200 grit)
- Painter’s tape and plastic sheeting
- Knee pads (trust me)
For polished concrete, the list is shorter but pricier:
- Concrete grinder (rental, ~$150/day)
- Diamond pads (set of 6, ~$100)
- Densifier and sealer
- Shop vac with HEPA filter
- Ear plugs and a good playlist
One tool you don’t need? A level. Microcement self-levels to some degree, and polished concrete is already flat. But if your slab has big dips, you might need a self-leveling compound first. That’s a whole other rabbit hole.
Cost Breakdown: DIY vs. Pro
Let’s talk money, because that’s why you’re here, right? A pro installation for polished concrete runs $8-15 per square foot. For a 500 sq ft loft, that’s $4,000 to $7,500. Ouch. DIY? You’re looking at $500-1,000 for rental and materials. Microcement is similar—pros charge $6-12 per sq ft, DIY kits cost $200-400 for a small room.
But here’s the hidden cost: your time and sanity. Polished concrete takes a full weekend of grinding, plus drying time. Microcement is a week-long process if you do it right. So ask yourself—do you have the grit? If yes, go for it. If not, maybe hire a pro for the grinding and do the sealing yourself.
Maintenance: Keeping That Loft Look
Here’s the good news: both floors are low-maintenance. Sweep or dust mop regularly. For deeper cleaning, use a pH-neutral cleaner. Avoid vinegar or bleach—they’ll dull the sealer. Every 3-5 years, you might need to reapply the sealer. That’s it. No waxing, no buffing. Just a damp mop and a sense of pride.
One thing to watch for: scratches. Concrete is hard, but not scratch-proof. If you drag a metal chair leg across it, you’ll see a mark. But here’s the beauty—scratches in concrete look like patina. They tell a story. In a loft, that’s part of the charm.
Final Thoughts (No Fluff)
DIY microcement or polished concrete isn’t for everyone. It’s messy, it’s loud, and it’ll test your patience. But when you step back and see that seamless, glowing floor—the way it catches the late afternoon light, the way it ties the whole loft together—you’ll know it was worth it. It’s not just a floor
