By Greg Allan, tradesman and creator of Data First Coaching
Why does my window and door business feel flat out but the bank account doesn't match it?
Because busy and profitable are two different things, and most window and door installers only track one of them. A full board of measures, installs and supplier deliveries fills the diary, but if the labour spent on install day isn't being costed properly against each job, every quote can look healthy on paper while the real margin quietly disappears.
This is the gross-to-net gap. It happens when install labour sits in general overhead instead of being attributed to the specific job it was spent on. A sliding door replacement and a bifold install for a renovation client might both show a tidy margin on the quote, but if the hours the crew actually spent on site, including the flashing, the weatherproofing, the second trip back for a frame that didn't sit right, aren't captured against that job, the business never sees where the time actually went. Multiply that across a month of installs and the gap between what the diary says and what the bank says gets wide fast.
Where does the money actually disappear between the measure and getting paid?
It disappears in the waiting. A window and door installer doing renovation work for builders is often paid in stages, or only once the builder has signed off the job, and that sign-off can sit weeks behind the actual install. The glass is in, the aluminium frame is fitted, the security door is hung, and the job is done, but the invoice is still sitting in receivables.
A business can be profitable on its profit and loss statement and still have no money in the account, because growing receivables sit outside that figure entirely. For a window and door installer juggling a handful of builder jobs at once, each with its own payment terms, that gap between invoiced and banked can grow without anyone noticing until the crew's wages are due and the cash isn't there.
What number tells you the truth when the diary can't?
The number that tells the truth is your gross profit margin on each job, not the quote total and not how full the calendar looks. If you only check the diary, you're checking activity. If you check the margin, you're checking money.
This means closing off the month properly rather than only glancing at the bank balance between installs. A window and door business that looks busy every single week still needs that monthly close, because the diary shows work done, not profit kept. Knowing your gross profit margin, and watching it month to month rather than job to job, is what separates a window and door installer who is working hard from one who is actually getting ahead.
What is an AI agent and how could it help close this gap?
An AI agent is software that does a piece of office work the way you would do it yourself, using your prices, your wording and your rules, without you having to sit down and do it. For a window and door installer, that means the non-billable admin, chasing timesheets, flagging a job where hours ran long, following up a builder invoice that's gone quiet, can happen in the background instead of eating into an evening.
Picture a window and door installer whose crew is busy every week with installs and supplier pickups, but staff time on jobs isn't being captured properly. Hours on site slip through the cracks between the measure, the install and the second visit to fix a flashing issue, and none of that time gets recovered in the job cost. The fix wasn't working harder. It was changing how the team checks in and out of each job, so time on site is recorded consistently from arrival to departure, and that labour finally lands against the right job instead of disappearing into overhead.
This is data first thinking: start from what the job actually cost, not from how busy it felt, and let AI agents handle the capturing and chasing so the owner and the crew spend their time on the next measure and the next install, not on paperwork.
Could the bills you're not looking at be part of the problem?
Yes, and they're often the quiet part of the gap. Liabilities like wholesale bills for glass, aluminium and timber frames, along with tax set aside from each job, sit in the background while the owner is focused on the next install and the next supplier lead time. Buying in bulk to get better pricing on frames and double glazing can be good business, but if those bills aren't tracked against the cash coming in, they build up unseen and land all at once.
For a window and door installer with supplier accounts running alongside builder payment terms on the other side, it's easy to feel comfortable because the bank balance looks fine this week, without seeing what's already committed against it. The business can be doing everything right on the tools and still get caught out by what was never being watched.
How does Data First Coaching approach this?
Data First Coaching starts from your own numbers through the Trade Business Intelligence, not from a conversation about how busy things feel. For a window and door installer, that means looking at gross profit margin by job, receivables against builder payment terms, and the liabilities sitting quietly behind the supplier account, to find where the gap between busy and profitable actually starts.
As Greg Allan puts it, “clarity removes fear”, and the same thinking applies to “all those liabilities sitting there that you don't look at”. The how, the systems and the builds that fix this for a specific window and door business are worked through inside the Academy, with members, because the Trade Business Intelligence is powered by every member who is open minded, innovative and willing to share what they learn.
