20 Questions to Ask a Cabling Contractor:
and the answers that should end the meeting.
Five groups — credentials, process, materials, documentation, commercial terms — with the red-flag answer for every question. Written by a contractor that answers all 20 for a living.
Before hiring a cabling contractor, ask 20 questions in five groups: credentials and coverage (who is in the building, COI, BICSI, licensing), process (survey, after-hours, PM, change orders), materials and quality (exact components, labeling, pathway, warranty), testing and documentation (certification standard, as-builts, photos, sample closeout), and commercial terms (payment, failed drops, references, and when they're not the right fit). Each has a red-flag answer that predicts trouble.
SRS Networks is a nationwide IT infrastructure deployment partner headquartered in South San Francisco, California, executing structured cabling and network deployments for multi-site enterprises and channel partners across all 48 contiguous states since 1996. These are the questions our own channel partners ask us — and the ones we wish every buyer asked, because they filter for the contractors who do the work right.
The 20 questions, with red-flag answers
Print this. The questions take 30 minutes in a vendor meeting and save weeks on the back end.
Credentials & coverage (1–4)
| Question | Why it matters | Red-flag answer |
|---|---|---|
| Who exactly will be in my building — your employees or subcontractors? | Either answer can be right. What matters is whether the contractor knows, and what governs the people who show up: agreements, supervision, background process. | “We'll figure out staffing after award.” |
| Can I see your COI right now, with limits? | Insurance is verified before work, not after. On enforced jobsites a failed COI check is a multi-day stop-work order — a $5K–$40K margin event on a rollout. | “Certificate available upon award.” |
| What BICSI or manufacturer credentials do your installers and your designer hold? | Credentials predict whether the plant will pass certification and qualify for warranty registration. A named RCDD or BICSI Technician on the design is the strong answer. | No specific credential or person named. |
| Where are you licensed for low-voltage work, and who holds the license? | Low-voltage licensing is state-by-state and enforcement is real. Multi-state projects need a contractor who can list its licenses, not gesture at them. | “We work everywhere” with no license list. |
Process & scheduling (5–8)
| Question | Why it matters | Red-flag answer |
|---|---|---|
| What does your site survey cover, and what does it cost? | Surveys run $150–$400 remote or $450–$1,200 on-site in 2026, and they are what keeps the quote from being a guess. The survey scope tells you how the contractor thinks. | “We don't need a survey for this.” |
| How do you handle occupied space and after-hours windows? | After-hours work carries a real +25–50% premium. A contractor who prices it up front is planning the job; one who is silent about it is planning a change order. | No premium disclosed for an occupied building. |
| Who is my single point of contact, and what does that cost? | Program management runs 8–12% of program cost when priced honestly. A named PM with a reporting cadence is what keeps a multi-closet job off your desk. | “The crew lead will handle coordination.” |
| How are change orders priced? | Unit pricing in the original quote — per drop, per AP, per camera — is your protection after award. Without it, every add is negotiated from scratch at 2–3x. | No unit rates; “we'll quote adds as they come up.” |
Materials & install quality (9–12)
| Question | Why it matters | Red-flag answer |
|---|---|---|
| Exactly what cable and components are you quoting? | Category, jacket rating, manufacturer, jack and panel models. Substitutions between quote and install are where margins get quietly recovered. | “Or equivalent” with no submittal offered. |
| What labeling scheme will you use? | A room-faceplate-port scheme, stated up front, is the difference between a documented plant and a guessing game for every future tech. | No scheme; “we label everything clearly.” |
| What pathway are you using, and is fire-stopping included? | Pathway and penetration fire-stopping are real scope with real code exposure. “Existing pathway” claimed sight-unseen means nobody has looked above the ceiling. | Pathway unaddressed, fire-stopping excluded silently. |
| What does your warranty actually cover, and who backs it? | Installer workmanship coverage and manufacturer plant warranties are different products. SRS, for example, carries a 5-year bumper-to-bumper warranty on datacom products it installs — provided they were purchased through SRS as part of the bid. Ask any contractor for the same specificity. | “Manufacturer warranty” with no terms, or no workmanship coverage at all. |
Testing & documentation (13–16)
| Question | Why it matters | Red-flag answer |
|---|---|---|
| What test standard do you certify against, and what deliverable do I receive? | The strong answer names the instrument and the artifact: Fluke certification, PDF report per drop. This single answer predicts install quality better than any reference call. | “We test everything” with no standard named. |
| Do I get as-builts and a cable map at closeout? | As-builts are what your next contractor, your IT team, and your integrator will work from for a decade. They are deliverables, not favors. | As-builts cost extra, or aren't offered. |
| Do you photo-document the work? | Per-drop or per-zone photos settle disputes in minutes and prove what is above the ceiling without a lift. Standard practice for contractors who expect scrutiny. | “We can if you want” — meaning it isn't their habit. |
| Can I see a sample closeout package from a similar job? | The fastest possible audit: a real (redacted) closeout package shows you exactly what you will receive. Contractors with good documentation are proud to show it. | No sample exists. |
Commercial terms (17–20)
| Question | Why it matters | Red-flag answer |
|---|---|---|
| What are your payment terms and billing structure? | NET 30 with milestone billing — SRS runs 40/30/30 on project work orders — ties payment to verified progress. Terms tell you how the contractor finances itself. | A large deposit due before mobilization. |
| What happens if a drop fails certification? | Failed drops are the installer's to remediate inside the quoted price. That is what certification is for. | Remediation billed as time and materials. |
| What references do you have at this scope in the last 24 months? | Recent, similar-scope references — same site count, same building type. Old or mismatched references are a different company's track record. | References offered only from years ago or smaller jobs. |
| When are you NOT the right contractor for a job like this? | The honesty test. Every real contractor has a boundary — too small, too far, wrong trade mix — and can name it. The answer tells you whether the sales motion or the operations team is talking. | “We're a great fit for everything.” |
Why the documentation questions carry the most weight
Documentation failures don't show up at closeout — they show up years later, at full price. We once took over a 21-camera site where cameras 1–10 had been sold as one brand but were actually a Jovision OEM, and cameras 11–21 were a Hikvision-clone OEM with a completely different stream path. No documentation existed; the original installer never noted it. Nothing worked through the new video system until we walked the site, sniffed every stream, and re-documented every path and credential — two days of work that should have been a page in the original closeout package.
Questions 13 through 16 exist to prevent exactly that. A contractor who names its test standard, shows a sample closeout package, and photo-documents by habit is a contractor whose work your next vendor can build on instead of excavate. Ask those four first if the meeting runs short.
When four questions are enough — and when SRS isn't your answer
For a small single-site job, four questions cover the real risk: the COI (question 2), the test standard (13), the warranty (12), and recent references (19). A good local shop that clears those four is the right hire — and at that scale it will beat SRS on price and drive time, because our coordination model pays back on multi-site programs, not one-room jobs. Ask all 20 when the project has multiple closets, occupied space, an enforced GC, or a site count.
Straight answers on vetting contractors
What test standard do you certify against, and what deliverable do I receive? The strong answer names both the instrument and the artifact — Fluke certification with a PDF report per drop, plus as-builts at closeout. That one answer predicts install quality better than any reference call, because contractors who certify their work build so it passes.
Four cover the real risk on a small single-site project: the COI with limits, the test standard and deliverable, the warranty terms, and recent similar-scope references. A good local shop that clears those four is the right hire at that scale. The full 20 earn their time when the project has multiple closets, occupied space, an enforced GC, or a site count.
Either can be right — the red flag is a contractor who can't tell you which, or whose subs operate without agreements. The strong pattern is a defined structure: SRS runs in-house W-2 leads as the backbone with a vetted W-9 subcontractor bench, every sub under a 24-month agreement with a 150-mile non-compete and a COI audited before dispatch. Ask any contractor to describe their equivalent.
A current COI showing general liability, workers' compensation, and auto coverage at limits that meet the site's requirements — provided with the bid, not promised after award. On enforced jobsites a failed COI check means a multi-day stop-work order, which in our experience costs $5K–$40K in margin on a rollout. Collect the certificate before you sign.
No — low-voltage licensing is the legal requirement and varies by state. BICSI credentials are the industry's competency signal: they predict standards-compliant pathway, termination, and testing work, and many manufacturer warranty programs require certified installers. Treat a named BICSI credential as strong evidence, and no named credential as a question mark.
Walk. Unit pricing — per drop, per AP, per camera — in the original quote is your only protection on change orders. A contractor who withholds it retains the ability to price every mid-project add from scratch, without competitive pressure, which typically lands at 2–3x the bid-equivalent rate. Good answers elsewhere don't offset that.
Before, ideally inside a written RFP — putting the questions in the spec forces every bidder to answer in writing and makes the responses comparable. The SRS structured cabling RFP checklist covers the spec side, and the bid-comparison guide covers scoring what comes back. Asking after quotes arrive still works; it just costs a round of clarifications.
In writing, with the quote: COI attached, W-2 leads and vetted bench described, licensing listed, Fluke PDF per drop committed, as-builts and photo documentation standard, sample closeout package on request, NET 30 terms with 40/30/30 milestone billing, and unit pricing for adds. Question 20 gets a real answer too: under roughly 25 sites, a local shop is usually your better deal — and we say so.
Put SRS through all 20
We answer every one in writing with the quote: COI attached, credentials named, Fluke PDF per drop, sample closeout package on request, NET 30 terms. Question 20 included — we'll tell you if the job is too small for us.