Boston Micro-Topping, New Concrete Surface, No Tear-Out
When a slab is too patched or inconsistent to finish directly, a millimetre-thin polymer overlay gives it a fresh, seamless face. Boston Concrete preps, primes, and trowels the topping in lifts, then hands you a surface ready for polished concrete, stained concrete, or a sealed finish. Free written estimate on every job.
Three Questions That Decide Whether Micro-Topping Is Your Answer
Start with the slab condition. If the concrete is structurally intact but the surface is a patchwork of repairs, discoloration, or old adhesive residue, a micro-topping is almost certainly the right call. The polymer-modified overlay bonds directly to a prepared substrate and hides everything underneath it. See how it compares to a full self-leveling underlayment pour when the slab is also out of level.
Next, consider the finish you want above. Polished concrete, for instance, depends on a consistent surface to grind into. A heavily patched slab will telegraph every repair through the grind. The micro-topping gives the polished concrete process a uniform starting point, so the finished floor reads as one continuous surface rather than a map of old repairs.
Finally, check whether the slab moves. Heaving, active cracks, or base failure underneath are structural problems that a thin overlay cannot address. In those cases, the honest answer is tear-out and a new concrete slab installation. We walk every floor before quoting and tell you plainly which category it falls into. If micro-topping is the right move, we also check whether heated floor underlayment belongs in the stack before the topping goes down.
Recent work
From first look to finished floor
How Boston Concrete Micro-Topping Gets Applied, Step by Step
On-site slab assessment
We read the existing concrete: surface profile, moisture vapor readings, crack activity, and any previous coatings or adhesives. The finish going on top is confirmed at this stage so the primer and topping system are specified correctly from the start.
Mechanical prep and crack repair
The slab surface is ground or shot-blasted to open the pores and create mechanical bite for the topping. Active cracks are routed and filled; dormant surface cracks are addressed with the appropriate repair material before any primer goes down.
Primer coat and first topping lift
A manufacturer-specified primer seals the substrate and ties the topping system together. The first thin lift of polymer-modified topping is trowelled flat, feathering into the substrate profile and beginning to build the new surface.
Subsequent lifts, burnish, and cure
Additional lifts build to finished thickness, each one tight and smooth. The surface is burnished to the texture the finish above requires, then cured to schedule. Polish, stain, or sealer follows once the topping has reached full hardness.
Finish options above the topping
Polished Concrete, Stained Concrete, or Sealed, What Goes on Top
A micro-topping is a platform, not a final look. The most common finish above it is a polished concrete system: the topping grinds and polishes to a hard, reflective surface that holds up well in kitchens, living areas, and Brookline or South End condos where the slab below was never in good enough shape to polish directly.
For homeowners who want colour and warmth, stained concrete over the topping layers in acid or water-based pigment, then seals for protection. The result is a floor with depth and variation that reads nothing like bare gray concrete. A clear sealer alone is also a clean, low-maintenance option when the goal is a smooth, satin surface without added colour.
If radiant heat is part of the renovation, the sequence is straightforward: heated floor underlayment encases the tubing first, the micro-topping goes over it, and the finish above completes the stack. The topping is thin enough that heat transfer to the surface is not compromised. For rooms where the floor needs to be brought into tolerance before the topping, a self-leveling concrete pour can precede the micro-topping in the sequence.
Boston Micro-Topping, Homeowner Questions Answered
Thickness, suitable slabs, finish options, and what the topping cannot fix.
A few millimetres total, applied in lifts. It is not a full overlay; it is a thin resurfacing that bonds to the substrate and gives the next finish a clean canvas.
When the slab has structural problems, heaving, deep cracks that move, base failure. The topping fixes a cosmetic-grade slab problem, not a structural one. We assess the slab and tell you straight which side of the line it is on.
Any of the interior finishes we install, polish, stain, or a clear sealer. The topping is engineered to take them all.
Done properly, no. The lifts blend together and the burnish produces a uniform surface. We pre-test on a sample area for tricky finishes to confirm the look before doing the whole floor.
Yes. Heated floor underlayment goes down first to encase the radiant heat tubing, then the micro-topping over it, then the finish above. The whole stack works as one heated floor system.
Homeowner reviews
What Boston Homeowners Say About Their Micro-Topping Floors
Old basement slab was patched and ugly. They micro-topped it then polished, and now it reads as a brand-new floor without the tear-out and mess of a replacement.
H. B.
Boston
★★★★★
Saved us a slab replacement on the main floor. Micro-topping plus stain plus seal gave us exactly the look we wanted, and the existing slab is hidden underneath.
M. L.
Cambridge
★★★★★
Knew the answer when they walked in, micro-topping was the move because of how patched our slab was. Done in less than a week and the new floor looks seamless.
P. O.
Quincy
★★★★★
Combined with heated floor underlayment underneath. The radiant heat warms the topping evenly and the finished floor is exactly the same look top to bottom.
U. E.
Somerville
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Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Boston.
Got a slab that's too far gone to finish directly but still structurally sound? Tell us the room size, the current surface condition, and the finish you have in mind. We'll walk the floor, confirm whether micro-topping is the right move, and put the full scope in a written quote.
