How many survey bookings is a window firm losing to unanswered calls?

Why this trade misses calls specifically

Because the person who answers the phone is usually the person doing the surveys.

In a firm under about fifteen people, the owner or the surveyor is out of the office most of the week. He's in someone's front room measuring a bay, or on a scaffold, or under a car park barrier at a trade counter. The phone rings and answering it means walking out of a sales appointment.

Then there's the timing. Homeowners ring when they're not at work — early evening, lunchtime, Saturday morning. Those are precisely the hours when a small installer has nobody at a desk. The enquiry peak and the coverage trough are the same hours.

And the caller isn't patient, because they don't have to be. They found three FENSA-approved installers on a postcode search two minutes ago. Yours was the first number. It won't be the one they remember.

Work out your own number

Don't take an industry statistic for this. The figures floating around the AI receptionist market are mostly unattributed and you can get the real one for your business in ten minutes.

Step one: ring your phone provider or open the call log in your system and ask for last month's unanswered inbound calls. Every provider has this. Most installers have never looked.

Step two: discount it. Not every missed call is a customer — suppliers, spam, the same person ringing twice. Halving the number is a reasonable working assumption and keeps you honest.

Step three: apply your enquiry-to-survey rate. If four in ten enquiries become a booked survey, apply that.

Step four: apply your survey-to-order rate and your average order value.

The number that falls out is what unanswered calls cost you last month. Do it for three months and take the average, because a single month can flatter you.

Two firms doing identical turnover can be two orders of magnitude apart on this. Which is why anyone quoting you a national percentage is guessing.

Why voicemail and callbacks don't close the gap

Voicemail is a dead letterbox in domestic glazing. Someone comparison-shopping a £7,000 job does not narrate their requirements to a machine.

Calling back later fails for a subtler reason. By the time you ring at half-seven, the homeowner has spoken to two other installers and possibly booked one. You're not first any more, you're third, and you're now selling against a survey that's already in someone's diary. The value of a call decays fast, and most of that decay happens in the first hour.

What actually works

Measure it before you buy anything. If you don't know your missed-call number, you can't tell whether anything you install has worked.

Missed-call text-back is the cheapest win available. Automatic text within a minute: name of your firm, apology, and a link or a question. Costs almost nothing, catches a meaningful share of callers before they dial the next number, and requires no change to how anyone works. If you do one thing from this page, do this.

A voice agent is the version that books the survey. Answers within two rings at any hour, greets in your business name, establishes what they need — replacement or new, how many, house or bungalow, rough timescale — checks they're in your area, and puts a survey slot in the diary against your real availability. Then sends you the summary. You ring back already knowing what the job is.

Route the calls that need you. An existing customer with a problem on a fitted job, a supplier, a trade enquiry — those escalate. A well-configured agent handles new domestic enquiries and gets out of the way for everything else.

What a voice agent can't do on a glazing call

This is the part vendors skip, so here it is straight.

It can't price the job. Nor should it try. Window pricing depends on sizes, configuration, glass spec and access, and a number given on the phone becomes an expectation you'll have to walk back at the survey. Anyone selling you phone-based quoting for windows hasn't sold windows.

It can't handle a complaint well. A customer whose new door won't lock in February is not a scenario for automation. Escalate immediately.

It can't judge access or feasibility. Second-floor sash, no scaffold access, listed building — those need a person's eyes.

It will occasionally get something wrong. Every system does. What matters is what happens next: does the call escalate cleanly to a human, and do you get a recording and summary so you can see what happened? If a vendor won't discuss failure modes, they've never run one in anger.

Used inside those limits, it does one job extremely well: it turns a call you'd have missed into a survey in the diary.

If the calls are being answered and the problem is what happens after the survey, read why window and door quotes go cold. For where this sits in the overall order of operations, see what a window and door installer should actually do about AI in 2026.

Where OrderWolf fits

We don't hand you a voice agent and a dashboard. We configure it on your services, your area and your qualifying questions, wire it into your diary so surveys land in real availability, connect it to the CRM so every call becomes a tracked enquiry, and set the escalation rules for the calls that need you. Then we run it.

At GEV, our Irish flagship client, surveys booked rose 8% and the B2C close rate moved from 45% to 70% across a three-month deployment. Results from one installer — yours will depend on your call volume, your market and where you're starting from.