How to get commercial roofing work: service, re-roofs and bids

Commercial roofing looks like a different industry from the outside: low-slope membranes, specifications, bonds, general contractors and purchasing departments. From a residential crew's truck it can look out of reach. It is reachable. The realistic way in is a leak on a Tuesday that you answer, fix and document better than the last company did. The big re-roof bids come after the manager trusts you with the building.

This guide covers the four ways into commercial roofing, who buys it, the safety and paperwork buyers check, how to find work through channels you own, how to bid, the extra rules on government projects, and how to keep a building once you have it. None of this is legal advice. Contractor licensing, prevailing wage and bonding rules for state and local jobs differ from one state and city to the next; confirm them locally.

Four ways into commercial roofing

Service and maintenance need the least capital and teach you the buildings. Re-roofs and new construction carry bigger tickets and bigger risks: material costs fronted for weeks, payment schedules that may hold back retainage, and bond requirements you have to qualify for before you can bid. Our guide to surety bonds explains how bonding works.

Who buys commercial roofing, and what do they want?

• Property managers handle roofs for owners. They want a leak stopped today, a tenant kept calm, photos for the owner and a repair price they can approve without a meeting.
• Facility managers for schools, plants, churches and chains plan budgets years ahead. They want condition reports that tell them which roof to replace and when.
• Building owners of a single strip center or warehouse decide quickly and remember who helped.
• HOA and condo boards manage many roofs on a reserve budget. They want a clear scope the whole board can understand, usually presented through a community manager. Rules for how associations hire contractors come from their governing documents and state law, which vary.
• General contractors want subcontractors who hit the schedule, staff the job, keep the site safe and do not fight every change order.
• Public owners (schools, cities, counties, housing authorities, federal agencies) buy through formal procurement.

Start with service and maintenance

A leak call is a sales call. The manager who calls has a wet ceiling tile, an unhappy tenant and an owner asking questions. Answer the phone, show up when you said, find the actual source (which may be well away from the stain), make a sound temporary or permanent repair, and send a short report with before and after photos the same day.

Then offer the next step: a full roof survey. Walk the whole roof, photograph drains, flashings, seams, penetrations, curbs and edge metal, note ponding and damage, and write a plan in three buckets: fix now, fix this year, and budget for replacement in a stated range of years. A plan like that positions you as the company that knows the building when the replacement budget is approved.

Maintenance programs turn that into recurring work: scheduled inspections, drain and gutter clearing, sealant and flashing touch-ups, and a report after every visit. If the roof is under a manufacturer's warranty, read its terms and keep your visit records in a form the owner can hand over if a claim ever comes up.

The safety record and paperwork buyers check

Commercial buyers and GCs often prequalify subcontractors before they invite a bid. Expect questions about your safety program, your training records, your injury history and your insurance. Fall protection deserves the most attention in that conversation. Under OSHA's construction rules, each employee doing roofing work on a low-slope roof with unprotected sides and edges 6 feet or more above lower levels must be protected by guardrails, safety nets, personal fall arrest systems, or a warning line system combined with one of those or with a safety monitoring system. A safety monitor by itself is allowed only where the roof measures 50 feet across or less. On a steep roof at that height, the options narrow to toeboarded guardrails, nets or personal fall arrest (29 CFR 1926.501). Have a written fall protection plan for each job type and train every crew on it. For crew training and toolbox talks, see our job site safety guide.

The vendor file usually includes:

• Insurance certificates for general liability, workers' compensation and auto, often naming the owner, manager or GC as additional insured. The certificate is only a summary (in a 2009 bulletin, Indiana's insurance department called certificates an informational summary that should not be used to amend the policy); the additional insured coverage itself comes from an endorsement to your policy, so ask your agent before you promise it.
• A W-9 so the payer has the tax ID it needs when it files information returns with the IRS.
• Licenses where your state or city requires them. Our roofing license guide explains how to check.
• Bonding capacity, in writing from your surety, for jobs that require bid, performance or payment bonds.
• Manufacturer credentials for the systems you install, if the specification calls for a manufacturer's warranty. Ask each manufacturer what it requires before you bid their system.

How do you find commercial roofing work through owned channels?

• A commercial roofing section on your website: low-slope repair, the membrane and coating systems you work with, maintenance programs, a 24-hour leak line, and the area you cover. Use the words a property manager would type after a tenant reports a leak. Our roofing industry page lays out the residential side, and our website service builds both.
• Property manager and owner groups. IREM lists 72 U.S. chapters for property and asset managers (IREM), and BOMA International lists local associations for commercial building owners and managers (BOMA). Go to listen to what managers struggle with; the business cards can wait.
• Community associations. CAI's membership includes board members, community managers and the businesses that serve them (CAI).
• General contractors' bid lists. Call the estimators at GCs who build in your area and ask how subcontractors get on their invitation lists and what prequalification they require.
• Your residential customers. The homeowner whose shingles you replaced may own a strip center, sit on a church building committee or manage a warehouse with a ponding flat roof. Ask at the final walkthrough, when they have just seen your cleanup.
• Storms. After hail or wind, commercial owners need inspections and documentation for their insurers. Plan ahead with our storm response guide.

None of these channels charge per lead, and every building you serve well can become a reference for the next manager.

How do you bid a commercial re-roof?

1. Read the whole package. Specification, drawings, addenda, insurance and bond requirements, schedule, liquidated damages and payment terms.
2. Walk the roof at the site visit and note what the drawings miss: extra penetrations, wet areas, deck problems, rooftop equipment that must be lifted or disconnected.
3. Do the takeoff by area, perimeter, penetrations, drains and flashing details.
4. Price the hidden work as unit prices. Wet insulation and deck replacement should carry a stated price per unit so surprises become change orders instead of losses.
5. Price access and logistics: crane or hoist, staging, dumpsters, protection for occupants, night or weekend work.
6. Write clarifications and exclusions: what you assumed, what you did not include, and how long the price holds.
7. Submit questions in writing before the deadline, and acknowledge every addendum.

Our roofing pricing guide covers material, labor and overhead math, and our guide to bidding commercial jobs covers the bid package. Protect your right to be paid on every job; see mechanics liens explained.

Public roofing jobs: bonds, prevailing wage and federal registration

Public roofing work comes with rules that private jobs do not:

• Bonds. Under the Federal Acquisition Regulation, a federal construction contract worth more than $150,000 needs both a performance bond and a payment bond unless a narrow waiver applies, and on contracts above $35,000 up to $150,000 the contracting officer selects two or more payment protections from a list that includes payment bonds and irrevocable letters of credit (FAR 28.102-1, as of FAC 2026-01). States and cities set their own bonding rules for their projects.
• Prevailing wage. The Department of Labor says Davis-Bacon applies to contractors and subcontractors on federally funded or assisted contracts over $2,000 for construction, alteration or repair of public buildings or public works, and that the laborers and mechanics on those jobs must get at least the area's prevailing wages and fringe benefits (DOL). States may have their own prevailing wage laws for state and local projects; check with your state labor department.
• SAM.gov. Bidding as a federal prime takes an active entity registration; SAM.gov issues your Unique Entity ID during that process and expects you to renew it every 365 days (SAM.gov). GSA's registration guide says SAM.gov charges nothing for this.
• Size standard. Roofing contractors are NAICS 238160, which the Census Bureau defines to include roof treating, coating and skylight installation. SBA sets the small business limit for 238160 at $19.0 million in average annual receipts, according to 13 CFR 121.201 on eCFR as read in October 2026 (eCFR).
• Subcontracting. SBA says large businesses that win federal contracts above set thresholds must carry a small business subcontracting plan; its certifications page puts the construction threshold at $2 million. Large primes can post subcontracting opportunities to SBA's SubNet database, and SBA notes that subcontracting lets firms not ready to work directly with a federal agency still take part (SBA).

SBA's 8(a), HUBZone, WOSB and SDVOSB programs reserve some contracts for firms that qualify, and APEX Accelerators provide no-cost help with government bids. Our government contracts guide covers the process step by step.

How do you keep a commercial roofing client?

Commercial roofing relationships are built per building. Keep a file for each roof you touch: the survey, every photo with its date, every repair, the warranty documents, and the condition plan. When the manager changes jobs, that file is what keeps the building with you, and it can follow the manager to the next portfolio.

• Send inspection reminders before the season, not after the first leak.
• Update the condition plan yearly so the owner can budget the replacement.
• Answer leak calls around the clock. If nobody in the office can pick up at 2 a.m., let an AI receptionist collect the address and leak location, then page your on-call lead.
• Invoice by building and purchase order, with photos attached, so the manager can pass costs to the owner without rework.

A custom CRM can hold every roof as its own record with photos, reports, warranty dates and the next inspection due, and send reports to managers from the roof. Our free system quote shows which commercial calls, forms and texts your company is losing right now.

Frequently asked questions