What Your Concrete Contract Has to Say in New York

Once the price clears $500, New York requires the whole agreement in a signed writing, and General Business Law section 771 lists what it must contain: start and completion dates, a description of the work and materials, the price, a mechanic's lien notice, how any payment taken before completion is held in trust, and notice that you may cancel until midnight of the third business day after signing. There is no state concrete license to check instead, so the contract is the check.

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Your driveway is named in the statute, by name

There is a specific body of New York consumer law covering this work, and it is not vague about whether concrete counts. General Business Law section 770, the definitions section of Article 36-A, defines home improvement as the repairing, remodeling, altering, converting or modernizing of, or adding to, residential property, and states that it includes the construction, erection, replacement or improvement of driveways, swimming pools, siding, insulation, roofing, windows, terraces, patios, landscaping, fences, porches, garages, solar energy systems, flooring, basements and other improvements of the residential property and all structures or land adjacent to it. Driveways, patios, porches and garages are all there in the text. Every protection in Article 36-A therefore applies to a concrete job at a house, which is a stronger position than most homeowners realize they are standing in when they take a quote.

The threshold that makes a writing compulsory

Under section 770 a home improvement contract is an agreement for the performance of home improvement between a home improvement contractor and an owner where the aggregate contract price in one or more contracts, including all labor, services and materials, exceeds five hundred dollars. A home improvement contractor is a person, firm or corporation that owns or operates a home improvement business, or undertakes, offers to undertake or agrees to perform any home improvement for a fee, and whose total cash price of all home improvement contracts with all customers exceeds one thousand five hundred dollars in any twelve consecutive months. Almost every concrete repair worth doing clears five hundred dollars, so almost every one of these jobs must be in writing as a matter of law. And the fifteen hundred dollar test means anyone doing this as a business is a home improvement contractor whatever they call themselves.

What section 771 actually requires on the page

Section 771 requires every home improvement contract and all amendments to be evidenced by a writing signed by all parties and to contain: the contractor's name, address, telephone number and license number if applicable; the approximate or estimated start and substantial completion dates with any contingencies that would materially change them, and a statement of whether a definite completion date has been agreed to be of the essence; a description of the work and the materials including make and model information and the agreed consideration; a mechanic's lien notice in clear and conspicuous bold face type; notice about how payments received before completion are handled; and, where there are progress payments, a schedule showing each payment as a sum in dollars and cents tied to a specified state of completion. Print that list and read the quote against it. A one-page price with none of it is not informal, it is incomplete.

The deposit rule is the one that protects your money

This is the provision to look for hardest, because it is the one that decides what happens if the work stops halfway. Section 771 requires notice that payments received before completion must be deposited in accordance with subdivision four of section seventy-one-a of the Lien Law, or that the contractor may instead post a bond, contract of indemnity or irrevocable letter of credit. Where progress payments apply, the schedule must show each payment as a sum in dollars and cents tied to a specified state of completion, with each payment bearing a reasonable relationship to the work performed or the materials purchased. So a large deposit demanded up front, with no trust language and no staged schedule, is missing provisions the statute requires rather than simply being an aggressive ask. Read the payment clause before the price.

Three business days to change your mind

Section 771 also requires the contract to notify the owner that, in addition to any other right to revoke an offer, the owner may cancel the home improvement contract until midnight of the third business day after the day on which the owner signed the agreement or offer to purchase, and that cancellation occurs when written notice is given to the contractor, which if mailed is deemed given when deposited in a properly addressed and prepaid mailbox. That is the direct answer to a doorstep close or a discount that expires this afternoon. Nothing about a driveway needs deciding while somebody stands on your step, the contract is required to tell you so in writing, and if it does not tell you, that absence is itself information about who you are dealing with.

There is no state license, so check something real instead

New York's Department of State states plainly that New York State does not license home improvement contractors, and that some counties and local municipalities do, naming New York City and the counties of Suffolk, Nassau, Westchester, Putnam and Rockland along with the City of Buffalo. Onondaga County and the City of Syracuse are not on that list, and no license or registration specific to concrete, masonry or flatwork exists at state level. So anyone who hands you a New York concrete license number is describing something that was never created. The same guidance tells you what to do instead: get a written contract with the contractor's details, a detailed description of the work, the total price and payment terms, a timeline, warranty terms and a change-order process, avoid large upfront deposits in favor of staged payments tied to completed work, and check with the town or county about permits and applicable codes.

One certificate you can genuinely ask to see

Insurance is checkable in a way a license is not, and on this trade there is a specific document worth asking for. Onondaga County's Department of Transportation requires a Work in the Right of Way permit for modifications to existing driveways such as widening and repaving, and will not issue one without a one million dollar insurance policy naming Onondaga County as additionally insured together with a workers compensation policy. That means any contractor who lawfully works on aprons at county roads here already holds that cover and has already produced the certificate for somebody. Asking to see it is a normal request, not a challenge, and it is a far better filter than a number on a truck. If the work touches the right of way, ask for the permit and the certificate together.

The mix belongs in the contract, in numbers

This is where most quotes go quiet, and it is the line item that decides whether the slab survives. NRMCA's guidance for concrete that will be continuously moist, exposed to freezing temperatures and subject to de-icing chemicals is to order exterior slabs at a specified strength of 4,000 psi, consistent with ACI 332, the code for residential concrete, reducing to 3,500 psi only where the concrete will not be continuously moist or where de-icers will not be applied. It calls for air-entrained concrete with a recommended total air content of 6 percent at 3/4 inch or 1 inch coarse aggregate, and a slump of 3 to 5 inches with no excessive water added at the jobsite. Four numbers, all checkable against the delivery ticket, and the last one is the one traded away for an easier pour.

Why exposure class is the phrase to use

ACI CODE-318-19(22) sorts concrete into four freezing and thawing classes. F0 is not exposed to freezing and thawing. F1 is exposed with limited exposure to water. F2 is exposed with frequent exposure to water, meaning parts of the concrete will absorb enough water to be saturated before it freezes. F3 is the same as F2 with de-icing chemicals applied. A salted, wetted driveway or garage slab in this county meets the F3 condition. Worth knowing why ACI 318's own examples for F3 name horizontal members in parking structures and above-grade foundation walls rather than driveways: 318 governs structural concrete in buildings, and flatwork on grade is ACI 332's territory. The classification is by condition, not by the name of the member. So ask what exposure class the mix was designed for rather than asking someone to read a class off a list.

Three respectable sources disagree, and you should know that

It would be easier to quote one number, but it would not be true. ACI 318 Table 19.3.2.1 sets, for F3, a maximum water to cementitious ratio of 0.40 and 5,000 psi for reinforced and prestressed members, and 0.45 and 4,500 psi for plain concrete. NRMCA and ACI 332 residential guidance says 4,000 psi for exterior slabs, which is below the F3 plain-concrete minimum. Table R402.2 of the Residential Code of New York State asks 3,500 psi with 5 to 7 percent total air for porches, carport slabs, steps exposed to the weather and garage floor slabs where weathering is severe. Three credible sources, three numbers. The practical reading is that 4,000 psi with 6 percent air is the residential standard of care here, that going to 4,500 is defensible on a heavily salted slab, and that 3,500 is a code floor rather than a target.

Air content is a number per stone size, not one number

Anyone quoting a single air percentage for all concrete is quoting a range they have read as a spec. ACI 318 Table 19.3.3.1 sets target total air by nominal maximum aggregate size. For F2 and F3 it is 7.5 percent at 3/8 inch, 7.0 at 1/2 inch, 6.0 at 3/4 inch, 6.0 at 1 inch, 5.5 at 1-1/2 inch, 5.0 at 2 inch and 4.5 at 3 inch. For F1 the same sizes run 6.0, 5.5, 5.0, 4.5, 4.5, 4.0 and 3.5 percent. Larger stone needs less air because there is less paste to protect. Flatwork normally uses 3/4 inch or 1 inch stone, which puts the number at 6.0 percent. The published guidance adds that specifying more air than the table states does not improve durability, and that the air may be cut by 1 percent when the specified strength is 5,000 psi or more.

The garage floor footnote worth knowing about

If you want a smooth garage floor in this climate, there is a trade in the code and it should appear in your contract. Footnote f of Table R402.2 of the Residential Code of New York State permits, for garage floors with a steel-troweled finish, a reduction of the total air content to not less than 3 percent if the specified compressive strength is increased to not less than 4,000 psi. That is why a smooth troweled garage floor is the slab most likely to scale here: the code itself allows the air to be cut by up to four percentage points to make the finish possible. If your garage floor was troweled smooth, the strength had to go up to 4,000 psi to pay for it. That is a specific question with a specific answer, and the delivery ticket settles it.

Cement substitutes are capped where de-icers are involved

Fly ash, slag and silica fume are good for concrete generally and are limited specifically where salt is in the picture. For exposure class F3 only, ACI 318 Table 26.4.2.2(b) caps supplementary cementitious materials as a share of total cementitious mass: 25 percent for fly ash or other pozzolans, 50 percent for slag cement, 10 percent for silica fume, 35 percent for fly ash or pozzolans combined with silica fume, and 50 percent for the total of all three. Section R402.2 of the Residential Code of New York State carries the same idea into residential work, providing that for garage floor slabs and for exterior porches, carport slabs and steps that will be exposed to de-icing chemicals, those materials shall not exceed the percentages specified in ACI 318. So a heavily substituted mix can be a perfectly good mix and still the wrong one for your driveway.

Which weathering column applies is your municipality's call

Before agreeing a strength for steps or a stoop, make one phone call. In the Residential Code of New York State, Table R301.2(1) is published with every column blank and the values are established by the local jurisdiction, with the footnotes directing that the weathering column be filled in as negligible, moderate or severe as determined from Figure R301.2(4), and that the jurisdiction fill in the frost line depth. Where weathering requires a higher strength than the structural requirements need, the weathering requirement governs. New York's own regulation, 19 NYCRR 1202.12, makes the owner responsible for providing those criteria with a permit application, and where the municipality has not established them, for obtaining them from a registered architect or professional engineer. Any single frost depth quoted to you as the New York figure has no statewide basis. Ask your own code office.

Put curing on the contract, because it is the first thing dropped

Curing is free to specify and the easiest thing to skip when a crew is behind. NRMCA states that curing begins immediately after placement and finishing and should continue for a sufficient period of time, typically 3 to 7 days, and that termination of curing should allow for gradual drying and prevent large temperature differentials in the concrete. It is also visible after the fact: a slab covered or coated for the days after the pour was cured, and a bare slab left in the sun and wind was not. Insufficient curing sits on NRMCA's own list of the causes of scaling, alongside too little entrained air. So write the curing method and the number of days into the contract next to the mix. It costs nothing to ask for and it is one of the few things you can verify by looking out of the window.

You can use all of this without hiring us

Nothing on this page is proprietary. It is a statute you can read, a state agency's own guidance, a trade body's free technical sheet and a code table. Take the section 771 checklist, the four mix numbers and the weathering question to whoever you were already planning to hire, and you will get a better job from them than you would have. If you want the same thing done by somebody who will write those numbers into the paperwork without being chased, send us the details of the slab, roughly when it was poured and what it is doing now. And if you read this and concluded the quote in front of you is fine, that is a good outcome and you should take it.