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Processes

Artificial intelligence in the window and door sector: a practical guide

How AI is changing the work of those in the construction industry: from cost estimation to automatic follow-up — what really works in 2026.

Guido Alberti·7 min read

Problem: a window installer with a handful of employees wastes 8-10 hours a week on repetitive work that an AI agent could do.

Solution: 3 concrete automations (quotes, follow-up, site reports) that can be implemented in weeks, not months.

Result: 20.240 € per year in recovered time. Calculated with a proper calculator.

The typical week that eats up evenings and Saturdays

A window installer in Northern Italy with two installation crews asks me for a consultation because he "can't keep on top of everything" and wants to understand whether artificial intelligence can help.

I asked him to log how he spends his office hours during the week. The sheet he sent me the following Friday tells a story I know well.

Monday: 3 hours writing quotes. For each one he has to open the configurator, look up current prices, calculate installation hours, and put everything into a presentable document. An average quote for a house takes an hour and a half.

Tuesday: 2 hours chasing clients who don't respond. He has 8 open quotes, 3 of which were sent more than 10 days ago with no reply.

Wednesday evening: 45 minutes at home reading the site managers' reports. WhatsApp voice messages, random photos, a handwritten sheet.

Thursday: another hour and a half for an urgent quote, plus 30 minutes on client emails.

Friday: weekly reports and planning for the following week.

Total repetitive work: between 8 and 10 hours per week. Every week. All year long.

Why "get management software" isn't the answer

He already has management software. He's tried two in 4 years. The problem is that management software is a tidy drawer. But you have to put the things in the drawer yourself. By hand. Every time.

The software doesn't write the quote for you. Doesn't call the client who isn't responding. Doesn't read the site manager's voice message and turn it into a structured report.

Artificial intelligence is something different. It's not a drawer. It's an assistant that does the repetitive work. Not the work that requires your experience and your twenty years of installations. That stays yours. It does the work you could delegate to a competent employee — if you had the budget to hire one.

The 3 automations that change the week

1. Assisted quoting: from 2 hours to 20 minutes

PhaseManual timeWith AI agent
Looking up codes and prices20 minautomatic
Configuring windows25 minautomatic
Calculating installation hours15 minautomatic
Document with margins20 minautomatic
Formatting and notes25 min15-20 min (review)
Total~1h 45min~20 min

The agent trained on your past quotes takes the site visit data and generates a complete draft in a few minutes. You review it, correct what needs correcting, and add notes from your own experience.

On 6 quotes per week: around 5 hours saved.

2. Automatic follow-up: from zero to 3 messages per quote

Follow-up is always the first thing to fall away when you have 2 sites to manage. Result: 70% of quotes die in silence.

The agent manages the sequence for every open quote. Day 3: useful content related to the project. Day 10: open question. Day 20: respectful close. Three personalised messages, without you having to remember who to contact and when.

When the client responds, you receive a notification and step in yourself. The agent handles the repetitive work; you manage the relationship when it matters.

Saving: 1.5 hours per week. But the real gain is the quotes that close which previously died in silence.

3. Voice site report: from 45 minutes an evening to 2 minutes

The site manager finishes the day and records a 2-minute voice message: "Today installed 3 windows on the first floor, 7 hours total. One bathroom window with scratched double glazing, photographed and reported to the supplier. Tomorrow we finish the first floor and start the second."

The agent transcribes, extracts the structured data (site, activity, people, hours, problems, next steps) and generates a clean report. The next morning, you know everything in 2 minutes.

Saving: around 3 hours per week.

BAU Agent

Automate repetitive work with BAU Agent

BAU Agent prepares quote drafts, manages follow-up and transcribes voice messages from site. You review and approve. The work that matters stays yours.

See how it works
Swiss
Made
BAU Agent
Day 3 follow-up sent
Client replied
Sequence paused

The calculation

AutomationHours saved/week
Assisted quoting5
Automatic follow-up1.5
Voice site report3
Total (conservative)8

8 hours per week × 46 working weeks × 55 €/hour = 20.240 € per year.

This isn't a made-up number. It's the value of the time that currently goes into repetitive work. Time you could use for site visits (which generate new business), following sites in person (which improves quality), or leaving the office at 6 pm instead of 8 pm.

What AI doesn't do (and won't anytime soon)

It's important to be honest.

It doesn't do site visits. Understanding whether an opening is square, whether there's space for the crane, whether the insulation will cause issues with the rebate — that needs your eyes and your experience.

It doesn't handle negotiations. When a client is about to spend 30.000 € on new windows, they want to speak to a person. That part is yours.

It doesn't know your council's regulations. Building rules change from one town to another. The agent doesn't know that your council has specific constraints. You do.

The AI agent multiplies the efficiency of someone who already works well. It doesn't make someone capable who isn't.

What changed after 3 months

Assisted quoting is the most used automation. The time per quote has dropped to around 25 minutes — slightly more than expected on complex jobs, but still an enormous leap.

Automatic follow-up recovered 7 quotes in two months that would otherwise have died. The recurring client comment: "It's lucky you wrote again — I had your quote but had forgotten to reply."

The voice site report is the one site managers love most. They don't have to fill in forms at the end of the day. They record the voice message in the car and the next morning the report is ready.

The number that counts most: Saturday mornings are free again. Before, they were spent at the office doing quotes and sorting out the week's data. Now everything is up to date by Friday at 6 pm.

How to start

You don't need to revolutionise the business. Start one thing at a time.

Week one: we talk for 30 minutes. You tell me how you spend your hours. We look at where you're losing the most time and where an AI agent can give you the fastest result.

Weeks two and three: we set up the first automation. Usually follow-up, because it's the simplest and results show immediately.

From month two onwards: we add assisted quoting or voice reports, depending on what's needed most.

If you recognise yourself in this typical week and want to understand how much time you're wasting on repetitive work, book 30 minutes with us. Your numbers in front of us, and a concrete plan.

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Want to apply these strategies in your business?

Book 30 minutes with Guido. We look at the numbers together and tell you where to start.

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