Slab foundation building in Quincy MA - a solid base planned from the gravel up
Building a home or addition on a slab? We go over the layers under it with you first, so it starts out solid.
- Fully licensed and insured.
- Free in-person estimates.
- Expect a reply within 1 business day.
What goes into a slab foundation in Quincy?
A slab foundation is a concrete slab poured over a layer of clean, coarse gravel, and that slab is the foundation of the house. Cornerstone Quincy Concrete builds them for homes, additions and garages in Quincy, MA.
Most people who call about a slab are planning a new house, an addition or a garage, and they want to know what it'll cost and when they can start framing. The price mostly follows the size of the footprint, how much digging and fill the ground needs, the slope of the lot and what goes under the slab. The schedule turns on permits, the weather and curing, which is the stretch of days the concrete needs to gain strength before it takes weight. Your written estimate spells out what's included, so you can see where the money goes.
What should you look at before a slab goes in?
Water sits where you'll build
If puddles hang around after rain on the spot where the addition or garage will go, the ground usually isn't draining away from that area. That's easy to fix with grading before the forms go up, and a lot harder once a slab is sitting in wet ground.
An old slab has sunk
A garage or shed slab with one corner lower than the rest, or a crack running clear across it, usually sat on dirt that was raked level instead of dug out and packed. Patching rarely holds, and the longer water gets under it the more it moves.
Your plans skip the base
Drawings often show the slab in detail and say very little about the gravel, the plastic or where water goes. Those layers decide how the slab holds up, and once concrete covers them, the only way to change them is to tear it out.
How we handle slab foundation building
Before we dig, I go over the layers under the slab with you, the gravel, the plastic sheeting and any insulation your plans call for, because they're far easier to get right at the start than to fix later. Then we mark out the footprint, dig down to firm ground and pack the subgrade, the soil the whole slab rests on, so it stays put under the house. I check where water runs on your lot so the ground falls away from the slab instead of toward it. We set the forms and the rebar, the steel that holds the concrete together, then pour, finish and keep the slab damp while it cures. I'll also show you what normal cracking looks like, so a hairline down the road doesn't worry you. If the budget gets tight, the base is the last place I'd cut, because a rough top can go under flooring but a soft base means breaking the slab out.
Some lots and house plans need deeper walls or a basement rather than a slab, and that's our foundation installation work. For builders and property owners putting up a small commercial building, we also do the concrete parking lot building around it, which starts with the same dug-out, packed base.
Slab for a new home
This covers the whole footprint, and it suits builders and owners starting from bare ground. The plumbing and electrical lines that come up through the floor get set before the pour, so we work with your trades on where they go.
Slab for an addition or garage
This suits homeowners adding onto a house that's already there. The new floor has to meet the old one at the right height, and the ground has to carry water away from both foundations, so we plan those two things first.
Get a written estimate for your slab foundation
We reply within one business day and set a time for me to come out, measure and talk it through. The estimate is free, in writing and comes with no obligation.
(617) 691-5008- Based in
- Quincy, MA 02169
- Hours
- Mon–Fri: 8 AM–11 PM, Sat–Sun: 7 AM–11 PM
What happens after you call about a slab in Quincy?
Here's how a slab job runs, from your first call to the day I walk you through caring for the new concrete.
Call or send the form
We get back to you and set a time for me to come out. Have the property address handy, and your plans if you have them.
I measure and write it up
I look at the site, measure and talk through what you want, then you get a written estimate that spells out what's included. You'll know what you're paying for before you decide anything.
We handle permits and dates
If the job needs a permit, we pull it ourselves. Then we pick a pour date with the forecast in mind, because rain or heat on pour day affects the finished slab.
We prep, pour and explain
Our crew does the prep and the pour. Afterward I walk you through how to care for the new concrete while it cures.
Why Quincy owners call Cornerstone Quincy Concrete for slab work
The owner writes your estimate
I'm the one who comes out to look at your lot and write the estimate, and I run the job with my crew of finishers and laborers. The person who explained the base to you is the one on site while it goes in.
In business since 2017
I came to concrete after years in another line of work and learned it on a finishing crew under people who'd done it their whole lives. I still explain each step, so you understand your job well enough to ask good questions.
Fully licensed and insured
Massachusetts doesn't recognize contractor licenses from other states, so ask any builder you're weighing for a Massachusetts license, us included. Ask about insurance too, since a foundation pour puts a crew and a concrete truck on your property.
Everything under a slab is buried for good the day we pour, so the time to ask questions is before the forms go up. Reach us through our contact page and I'll come out, walk the lot and talk it through with you.
Slab foundations and flood rules in Quincy
If your lot is low or close to the water, the flood map is the first thing I check. Under a proposed zoning change, the City of Quincy would require a special permit for all construction in its floodplain overlay district, which takes in every special flood hazard area in the city on FEMA's flood map for Norfolk County. FEMA treats those areas as high risk because they have a 1% or higher chance of flooding each year, which works out to at least a one-in-four chance over a 30-year mortgage. That rule is still a proposal, and whether your job needs a permit is something we check with the city's building office before we set a date. When it does, we pull the permit ourselves.
A lot of the slabs we pour around Quincy go under additions and garages on tight lots beside older houses, so room for the concrete truck and where the roof water already runs shape the plan as much as the slab does. We see the same kind of lots on jobs in Braintree and Weymouth.
Questions about slab foundations in Quincy
How much does a slab foundation cost near Quincy, MA?
Concrete foundation work in the Boston area usually costs about $13 to $33 per square foot, and that's the going rate for foundation work in general, not our price. Where your job lands in that range depends on your site, and I'll give you our number for your lot in a written estimate after I've seen it.
What is the best way to keep radon out of a new slab home?
National radon guidance for builders calls for clean, coarse gravel under the slab and heavy plastic sheeting on top, so soil gases like radon move under the house instead of coming up into it. That guidance says building those in typically costs less than treating a finished home for radon, so it pays to plan them from the start. The plastic also keeps wet concrete from clogging the gravel during the pour.
Will my new slab foundation crack?
Your new slab will probably crack a little, and that's normal. The concrete industry's own slab guide says that even with the best design and proper construction, a slab with no cracking or curling, where the edges lift slightly as the top dries, isn't realistic. Ask whoever builds your slab what normal looks like before the pour, so you can tell a hairline from a real problem.
Who has to oversee slab foundation work on a house in Massachusetts?
In Massachusetts, a licensed construction supervisor or a registered design professional has to oversee construction on one- and two-family homes of any size. The state's construction supervisor rules include an exemption for homeowners who run the work themselves, and the state tells you to check with the city's building official for any added local licensing. If the slab is for an addition to the owner-occupied home you live in, with one to four units, the contractor also needs state Home Improvement Contractor registration, which doesn't apply to new construction.
What is a frost-protected shallow foundation, and can I use one in Quincy?
It's a foundation that uses carefully placed insulation to keep the soil around it warmer, so it can sit shallower, as a national builder's guide describes it. The guide says it suits slab homes on lots with moderate to low slopes best, and the slab can go in with one pour, which speeds construction. Whether the city accepts it for your house is one of the things we check before we set a date.
How do I get ready for a slab foundation estimate in Quincy?
Have three things ready: the property address, the type of building, and whether your lot sits in a flood hazard area on the FEMA map. The address and the flood map tell me which rules may apply, and knowing whether it's a new home, an addition or a garage tells me what the slab has to carry. Then call (617) 691-5008 or send the form.
Other concrete work that goes with a slab
Foundation installation
When your lot or plans call for a basement or full-depth walls instead of a slab, this is the work that carries the house.
Concrete parking lot building
Property owners and builders who need cars parked beside a new building get the same packed base and drainage planning on a larger scale.
Where we build slab foundations around Quincy
Cornerstone Quincy Concrete is based in Quincy, Massachusetts, and builds slab foundations across the cities around it. The 12 cities below have their own pages, including Milton and Randolph, and we work in others nearby too.
Quincy, MA
Talk through your slab before the pour
Call (617) 691-5008 early, so there's time to check the flood map and sort out any permit before your framer is booked.