By Greg Allan, tradesman and creator of Data First Coaching
Why does a busy run of window and door installs sometimes leave no cash in the bank?
A full calendar of installs can feel like proof that a window and door business is winning, but the bank balance often tells a different story. Money lands in the account as jobs are invoiced, yet it still has to flow back out to the glazing supplier, the aluminium or timber frame supplier, and then the tax bill arrives on top of that. A run of good months on the tools does not automatically mean the cash is safe.
Most window and door installers watch the install schedule, not the cash position, because the schedule is what sits in front of them every day. By the time the supplier invoice for a big batch of frames or double glazing lands, and the tax instalment follows close behind, a genuinely busy quarter can still leave very little sitting in the account. The business was busy and still profitable on paper, but the timing of money in against money out was never checked.
Why do builders and renovators keep chipping away at a window and door quote?
Builders and renovators often compare quotes line by line, pushing on the price of the frame, the glass, the hardware and the install labour, hoping to shave something off a sliding door or bifold job. Many window and door installers respond to that pressure by discounting, because they do not have a number in front of them that proves what the job is actually worth before they agree to move.
Picture an installer who started out pricing every window and door job the same way, a flat rate worked out per item regardless of what the job actually involved. Every job was different in size, quantity or complexity, so a straightforward replacement and a full renovation with a run of custom sized bifolds were quoted on the same basis. He kept wearing the extra cost of oversized glass, awkward flashing details and extra site time that were never his fault to begin with.
What changed was the quoting itself. He stopped handing over a single fixed price and started giving a price window on each job, built around what the measure actually showed on site, not a guess made from the driveway. Builders and renovators still negotiated, but they were negotiating within a range that already protected the margin, not against a number that had nothing behind it.
What should a window and door installer look for in a business coach?
A coach worth paying for your window and door business starts from your own job and financial data, not from a script that could apply to any trade. Before anything else, a good coach wants to see your actual numbers behind the installs, the quotes and the supplier invoices, because that is where the real answer sits, not in a general conversation about the business.
Look for a coach who has actually run a trade business, who treats gross profit margin as something you protect on every quote rather than a figure checked once a month in the books, and who understands why a good run of installs on your calendar does not guarantee cash in your bank once suppliers and tax are paid. Greg Allan, who built and ran his own trade business before coaching others, teaches window and door installers to hold their price on frame, glass and install work rather than discounting to win a renovation job, and to use the measure visit itself to build trust rather than just take dimensions.
This is also where AI agents start to matter to you. An AI agent is software that does a piece of your office work the way you would do it yourself, using your own prices, your own wording and your own rules. A coach who understands what AI agents can take on, quoting follow ups, supplier order tracking, measure visit reminders, is looking at freeing up your time and your crew’s time to spend with customers, not just handing you another worksheet to fill in.
That data first approach, starting from your own numbers before any advice is offered, is what separates a coach who can genuinely help your window and door business from one who is guessing.
What questions should you ask before signing up with a coach?
Ask any coach how they would start working with your window and door business, and listen for whether the answer begins with your own numbers or with a generic programme. A coach worth paying should want to see your quoting, your supplier invoices and your cash position before telling you anything.
Useful questions to ask before signing up:
- Have you run a trade business yourself, and what kind
- What will you look at first in my business before we talk about a plan
- How do you handle a situation where my price is being discounted by builders on every job
- Do you expect me to hire more people as the answer to every problem, or do you look at the root cause first
A coach’s answers to these questions tell you far more than any sales pitch about whether they will actually change how your window and door business runs.
What are the warning signs of a coach who won’t help a window and door business?
The clearest warning sign is a coach who leads with a sales conversation rather than a question about your business. If the first meeting is about the offer and the price of coaching rather than about your quoting, your margins or your measure visits, that tells you where the relationship is headed.
Other signs to watch for:
- A coach who has never run a trade business and speaks only in general business language
- Advice that sounds the same regardless of whether you install windows and doors, build decks or wire houses
- Every problem answered with hire someone, rather than looking at whether the real issue is pricing, cash timing or how the measure visit is run
- No interest in your own numbers, your supplier terms or your lead times before offering a plan
None of these signs mean the person is dishonest, but they do mean the coaching is unlikely to find where your window and door business’s real problem starts.
How does Data First Coaching approach this?
Data First Coaching, built by Greg Allan, starts with the window and door installer’s own numbers rather than a conversation about the business. It looks at the gross profit margin sitting behind every quote, the timing of supplier invoices against the tax bill, and what actually happens on a measure visit, because that is where the three blind spots above usually begin. As Greg puts it, “money comes in the bank, but then you’ve got to pay the wholesalers and then your back tax bills come in”, which is exactly the pattern a busy install schedule can hide. The how, including systems built on each business’s own data through the Trade Business Intelligence, is worked through inside the Academy, with members who are open minded, innovative and willing to share, because the Trade Business Intelligence is powered by every member.
