How to Sell Materials, Tools and Equipment to US Contractors

To sell to US construction contractors, target one trade at a time, such as HVAC, electrical, roofing or concrete, and learn how that trade chooses products: some items are fixed by the project specification, others are chosen by the contractor, and many are bought through local supply houses. Then reach the owner, estimator, project manager or purchasing lead, depending on the contractor's size, with proof that your product meets the codes and approvals the trade works under.

This guide explains how contractors buy, what each major trade purchases, who decides, and how suppliers, including those outside the US, can approach them.

How do US construction contractors buy?

Construction buying has three features that surprise many suppliers.

Specified versus contractor-chosen products. On many commercial projects, architects and engineers write specifications that name required products or performance standards. The contractor must follow them, sometimes with "or approved equal" allowing substitutes. Tools, consumables and many installation materials are chosen by the contractor.

Submittals. Before installing specified products, contractors send product data, drawings and certifications to the design team for approval. A supplier who provides clean, complete submittal documents makes the contractor's job easier.

Supply houses. Many contractors buy through local distributors, such as HVAC supply houses, electrical distributors and roofing supply yards, because they need same-day pickup, credit terms and returns. A product that is not in stock locally is harder to use.

Takeaway: for many products, the real path to contractors runs through specifications and local distributors as well as the contractor itself.

What does each construction trade buy?

NAICS, the US industry code system, groups construction under sector 23. Specialty trade contractors are in 238. The table shows common trades and typical purchases.

General contractors on commercial buildings usually subcontract most of the trade work, so for trade products the subcontractor is often your buyer, not the general contractor.

Where are US contractors concentrated, by trade?

Secwyn's construction directory shows the trades in its verified company data, as of 2026-10-06. The largest groups on that page are plumbing, heating and air-conditioning contractors (503), commercial and institutional building construction (452), electrical contractors (422) and roofing contractors (322).

State pages show how the mix changes. On the Texas construction page, plumbing, heating and air-conditioning contractors (48) lead, followed by commercial building construction (44), electrical contractors (38) and roofing contractors (33). On the Florida construction page, roofing contractors (40) are the largest group. These pages show counts only, never company names.

Who decides what gets bought at a contracting company?

Estimators are an important and often overlooked target. If your product is in the estimate, it is likely to be in the job. Finding decision makers at US companies explains where names appear on company websites.

What approvals and codes do contractors ask about?

Contractors cannot install products that fail inspection, so they ask about compliance early.

• Electrical products generally need listing by a Nationally Recognized Testing Laboratory, such as UL, and must fit National Electrical Code practice.
• Plumbing products for drinking water are commonly required to meet NSF/ANSI standards and US lead-free rules.
• Roofing and building envelope products may need state or local approvals. Florida, for example, runs its own product approval system for many building products.
• Public projects funded with federal money can carry domestic-content rules such as Buy America requirements. Ask early whether a project has them.
• Installation instructions and warranties in clear English, which inspectors and owners may ask for.

Takeaway: list your approvals clearly on one page. Without them, many contractors cannot consider your product at all.

Step by step: approaching US contractors

1. Choose one trade and a few states where that trade is active and your product has approvals.
2. Decide your channel: direct to contractors, through supply houses, or both. Finding US distributors and wholesalers covers the distributor route.
3. Build a list of contractors by trade code and state, and check each website for the work they do: commercial or residential, service or new construction, project types.
4. Find two roles per contractor: the owner at small firms, or an estimator and purchasing manager at larger ones.
5. Write a short email that names a project type they do and how your product saves install time, reduces callbacks or meets a code requirement.
6. Offer submittal-ready documents and samples.
7. Follow up around bid and building seasons, when contractors are pricing work.

Secwyn can do steps 3 and 4 from a plain description of your product. It ranks contractors as Strong, Good or Possible fits with quotes from their own websites, and a company reveal shows the roles to contact and the people listed on the site. Cold email to US B2B buyers covers the first message.

Frequently Asked Questions

Should I sell to general contractors or subcontractors?

For trade products such as HVAC equipment, electrical materials or roofing systems, subcontractors in that trade usually choose and buy them, so they are the better first target. General contractors matter for site-wide items, temporary facilities and some structural materials, and they influence which subcontractors win the work.

Do US contractors buy directly from manufacturers?

Larger contractors sometimes buy directly for big projects or high-volume items, especially when they can plan ahead. Most day-to-day purchases go through local supply houses and distributors because contractors need fast pickup, credit terms and easy returns. Many suppliers sell direct for projects and through distributors for everything else.

What is a submittal in construction?

A submittal is a package of product information, such as data sheets, drawings, samples and certifications, that a contractor sends to the architect or engineer for approval before installing a specified product. Suppliers who provide complete, well-organized submittal documents make it easier for contractors to choose their products.

Which construction trades are the biggest buyers?

It depends on your product. Plumbing, HVAC and electrical contractors are among the largest specialty trades and buy a wide range of materials and tools. Roofing, concrete and site preparation contractors are major buyers in their own categories. Look at state-level data, because the trade mix differs from one state to another.

What approvals do I need to sell electrical products to US contractors?

Most electrical products installed in US buildings need listing by a Nationally Recognized Testing Laboratory, such as UL, so inspectors will accept them. Products must also suit installation under the National Electrical Code as adopted locally. Confirm the specific listing your product category needs before contacting contractors.

When is the best time to contact construction contractors?

Contractors are often busiest in the main building season and tend to plan, price work and review suppliers in quieter months. Many also look for products while estimating new bids. Reaching estimators and owners ahead of the season, with documents ready, usually works better than calling during peak installation weeks.

Next steps

Pick one trade and a handful of states where it is active and your product has the right approvals. Prepare a one-page approvals and submittal sheet, decide whether you will work through supply houses, and build a list of 30 to 50 contractors. Secwyn can rank contractors against your product and show who to contact at each one.