Concrete that will see freezing weather and deicing salt should be ordered at 4000 psi with entrained air, finished without adding water to the surface, cured properly, kept away from deicing salt for its first year, and protected with a penetrating sealer before its first freeze-thaw season.
What concrete needs in a salt-and-snow climate
Rochester averages about 102 inches of snow a year, with roughly 27 inches in January alone (National Weather Service normals for 1991 to 2020). That means months of plows, shovels, road salt, and water that melts in the afternoon and refreezes overnight. Concrete is porous. Water soaks into the surface, freezes and expands. Without tiny air pockets to absorb that expansion, the top layer pops off in flakes. That is scaling, and deicing salt makes it worse.
How a concrete driveway is built
- Excavate and prepare the baseSoft soil comes out and a compacted stone base goes in, graded so water drains away from the house and garage.
- Set the formsForms set the edges, the height at the garage and street, and the slope. This is where drainage is built in.
- Reinforcement where it is called forDepending on the design and loads, reinforcement is placed before the pour.
- Place and screedThe concrete is placed and struck off level with the forms.
- Finish without overworkingThe surface is floated and given a broom finish for traction. Adding water to the surface to make finishing easier weakens the top layer, which is where scaling starts.
- Cut control jointsConcrete shrinks and moves, so joints are cut to make it crack in straight lines where we choose instead of randomly.
- CureThe slab is kept from drying out too fast. Concrete keeps gaining strength for weeks after it looks finished.
Asphalt or concrete?
Caring for a new concrete driveway
- No deicing salt for the first year. Use sand for traction instead.
- A penetrating sealer before the first freeze-thaw season, and reapplied as the manufacturer recommends.
- Shovel or plow promptly so snow does not melt and refreeze on the surface all winter.
- Keep heavy equipment and dumpsters off it unless it was designed for them.
Driveway rules inside the City of Rochester
If the property is inside Rochester city limits, the city has its own process, and it applies to more than brand-new driveways. The city's self-serve instructions say a Certificate of Zoning Compliance is required to legalize, resurface, expand, or install a driveway on private property. Work in the public right of way, which usually means the apron or curb cut at the street, goes through a separate approval with the Department of Environmental Services.
These are the property owner's approvals. We will walk the property with you so the plan you file matches the driveway that gets built. Every suburban town around Rochester has its own rules, so check the page for your town or call your town building department.
Common questions
What psi concrete should be used for a driveway in Rochester?
For exterior slabs exposed to freezing weather and deicing salt, industry guidance (NRMCA, referencing ACI 332) calls for a specified strength of 4000 psi with entrained air.
Why is my concrete driveway flaking?
Surface flaking is called scaling. It usually comes from concrete without enough entrained air, water added to the surface during finishing, poor curing, or deicing salt used while the concrete was young.
Can I use salt on a new concrete driveway?
Not in its first year. Industry guidance is to avoid deicers on concrete less than a year old. Use sand for traction.
Should I seal my concrete driveway?
Yes. A quality penetrating sealer applied before the first freeze-thaw season helps keep water and salt out.
Is concrete or asphalt better in Rochester?
Both work when built correctly. Asphalt costs less up front and is easier to repair. Concrete costs more, needs less routine maintenance, and has to be built and cared for with road salt in mind.
Related services
- Driveway Paving: New asphalt driveways built on a real base, graded to drain away from your house.
- Driveway Replacement: Tear-out and repave when cracking, sinking or crumbling is past repair.
- Driveway Sealing: Sealcoating that protects asphalt from water, salt and sun, applied in the right weather.
- Parking Lot Sealcoating: Commercial sealcoating done in sections so your lot stays open.