Garage floor concrete in Boston MA - a floor that holds up to winter salt
Garage floor cracked, flaking or sinking? We pour a new slab on a dug-out, packed base, with joints we plan with you first.
- Licensed and fully insured.
- Free estimates at your property.
- We respond within 1 business day.
The garage floor concrete work we do
Full garage floor replacement
We break out the old floor, dig out soft fill and pour a new slab, which suits a floor that's cracked, sunken or flaking across most of it.
New garage slab on bare ground
For a new garage or one with a dirt or gravel floor, we build the base up from firm ground and pour a slab sized for cars and light trucks.
What does replacing a garage floor in Boston involve?
Garage floor concrete in Boston usually means breaking out a cracked, sunken or flaking floor, digging down to firm ground and pouring a new slab on a packed gravel base, so your cars park on something flat and solid.
Most calls start with a crack that keeps opening, a low spot by the door or a top that's flaking away, and the cause is usually underneath. We do this work across Boston and the cities around it. The price moves with the size of the garage, how much old concrete comes out and how deep we have to go to reach firm ground, and the schedule turns on whether a permit comes first, the weather on pour day and the curing wait while the slab hardens. The base is the part people want to trim because nobody sees it on day one, and it's the part I won't skimp on, since a nice surface on a weak base cracks the same way the old one did. I'll give you your own number after I've seen the garage.
Garage floor concrete, from the base up
I start by asking why the old floor failed, since that sets how deep we dig, and whether a sloped lot needs concrete retaining walls or you'd like decorative concrete on top.
Breaking out and digging
We break out the floor and dig to firm subgrade, the ground the slab sits on, since soft fill left under a slab settles.
Packing the base
We lay gravel in layers and pack each one, so the slab sits on a firm bed instead of loose fill.
Joints planned with you
Before the pour, I sit down with you and mark the control joints, cuts that give cracks a tidy straight line to follow.
Pouring and curing
Our crew pours early to stay out of midday heat that leaves a dusty top, then lets the slab cure, the wait while it hardens.
Your first winter plan
Before we leave, I go over how to handle the salt your cars bring in that first winter and what's fine to use after that.
Why Boston owners call Ironset for garage floors
I spent years patching slabs and steps on Boston rental buildings for a property manager and kept asking why they broke. I started Ironset in 2023 to pour concrete that doesn't need that patching, and I'd rather explain a problem plainly than rush a number.
I quote it and work the pour
I come out to look at your garage and write the estimate myself, and I work beside our crew while they form, pour and finish the floor.
Licensed and fully insured on every floor
We're licensed and fully insured, and I'm glad to go over that paperwork with you at the estimate, before anyone sets a form in your garage.
Known for floors that keep cracking
We're best known for awkward jobs like a slab that keeps cracking, and every floor is satisfaction guaranteed. Call (617) 226-2081 to get started.
What happens when you call about a garage floor in Boston?
We plan the job around how you use the garage, so before anything is booked you know what goes under the floor, whether a permit has to come first and when the space needs to be cleared.
or call (617) 226-2081
Call or send the form
Call (617) 226-2081 or send the form, and tell us a bit about the garage and what's gone wrong with the floor so far.
I come look at it
I look over the old floor and ask what's gone wrong with it before, because how it failed tells me what the new base needs.
Your written quote
Your quote shows the base and prep under the floor as well as the finish you'll see, and when the pour's done I walk it with you.
Get a garage floor estimate from Ironset in Boston
Send your garage size, whether you live in the house and how many units it has, and we'll reply within one business day. I'll set up a free estimate at your property, with no obligation and no pressure to book.
Garage floor questions we hear in Boston
How much does a new concrete garage floor cost in Boston?
A plain concrete slab in Boston, without staining or stamping, usually runs about $8 to $15 per square foot. That's the going rate around the city, not our price, and where your floor lands in it comes down to what I find on site. I'll give you your own figure once I've seen the garage.
How thick should a concrete garage floor be?
A 4-inch slab handles everyday cars and light trucks and covers nearly every home garage, as long as it sits on at least 4 inches of packed gravel over firm ground. That base gets most of my attention, because a thick slab on soft fill can still sink.
What is the best concrete mix for a garage floor in Boston winters?
For a floor that sees severe freezing and thawing, industry guidance is to order good quality air-entrained concrete, a mix with tiny air bubbles that give freezing water room to expand. You can ask for it by name when you compare quotes, so you know each contractor is pricing the same thing.
How do I protect a new concrete garage floor from road salt?
Keep deicing salt off it the first winter, because even the salt your cars carry in may cause severe scaling, where the top flakes away, on a newly placed slab. Industry advice is to skip deicers that first winter and use moderate amounts after that.
What causes cracks in a new concrete garage floor, and can they be stopped?
Concrete shrinks as it hardens and moves with the weather, so cracks can't be prevented entirely, but properly designed joints control where they show up and keep them small. That makes the joint plan a fair question for any contractor before the pour.
Can a flaking concrete garage floor be repaired instead of replaced?
Often it can, if the flaking is light to moderate, and minor scaling is mostly cosmetic and may not need repair at all. A floor with heavy scaling that keeps spreading may not be worth repairing, and I'll tell you which you have when I look at it.
Other concrete work near your garage
Decorative concrete
If you'd like the garage floor or the walk beside it to carry color or a pattern, decorative work adds that on top of a sound slab.
Explore Decorative concreteConcrete retaining walls
When your garage sits into a slope and the ground beside it keeps pushing in or slumping, a poured wall holds that soil back where it belongs.
Explore Concrete retaining wallsConcrete driveway building
A new garage floor often shows how tired the driveway outside looks, and pouring both on a packed base gives a cleaner meeting point at the door.
Explore Concrete driveway building
What Boston's rules mean for your garage floor concrete
In Boston, Inspectional Services issues Short-Form Permits for minor repairs or replacements that keep a home's structure and use, and Long-Form permits for work that changes either. The city lets homeowners doing their own work on a 1-2 family, owner-occupied home apply for a Short-Form Permit, while condo owners in a building with 3 or more homes, like one floor of a three-decker, have to hire a contractor. I won't guess whether your floor needs a permit, so we check with the city and help line it up before work starts. The state requires contractors working on an existing, owner-occupied home with one to four units to be registered as a Home Improvement Contractor, and hiring one who isn't leaves you out of state arbitration and the Guaranty Fund if problems come up. New construction and investment or vacation properties fall outside that law. Massachusetts also requires a licensed construction supervisor or registered design professional to oversee construction on 1- and 2-family homes and the structures that go with them, and its rules include homeowner exemption wording worth reading first if you plan to do the work yourself.
Around Boston we pour a lot of floors in older garages where the old slab went down on fill that was raked level and never packed, so it sank and cracked along lines nobody chose. We see the same thing on jobs in Somerville and Medford, and the fix is the same, digging to firm ground and packing a real base before anything gets poured.