Window and door installation has a cost structure that makes cancellations uniquely expensive compared to most service trades. Replacement windows and custom exterior doors are manufactured to the exact rough opening dimensions of each specific opening in a homeowner's house. Once ordered, they cannot be returned, resized, or easily repurposed for another project. A homeowner who cancels after custom windows are in production has created a product liability that may significantly exceed any standard booking deposit.
Understanding this cost structure is the key to setting up the right deposit at the right stage. The measure appointment deposit protects a relatively small professional time investment. The project signing deposit needs to cover the fabrication commitment you make when you place the order with your window manufacturer.
The two-stage deposit structure for window and door projects
Window replacement projects typically proceed in two stages before installation begins. The first is the measure appointment: a technician visits the home, measures each opening precisely, discusses product options, and produces a quote. The second is the project signing: the homeowner accepts the quote, signs the contract, and the custom windows are ordered from the manufacturer with a 3 to 6 week lead time.
Each stage needs its own deposit protection. The measure appointment deposit ($75 to $100) protects the 60 to 90 minutes of professional measurement and consultation time. The project signing deposit (25 to 40 percent of project total) covers the window manufacturing deposit you pay the fabricator, any permitting costs for larger projects, and the installation crew scheduling commitment you make when the windows are ordered.
The critical point: the project signing deposit must be collected before the order is placed with the manufacturer. Not after. A homeowner who cancels the day after you place the order with your fabricator has cost you the fabrication deposit whether or not you collected a customer deposit. Sequence the collection correctly.
Measure appointment no-shows: the preventable problem
Window and door companies that offer free measure appointments experience the same multi-quote problem as solar installers. A homeowner getting three quotes on a $8,000 window replacement project books measure appointments with all three companies and then cancels the ones they are less interested in, sometimes on short notice and sometimes not at all.
A $75 to $100 measure appointment deposit creates commitment without being a barrier for homeowners who are genuinely planning a window replacement. Homeowners who are still in the exploration phase, browsing prices without a real decision timeline, often decline the deposit and self-select out of your calendar. This is valuable information: your measure appointment calendar fills with homeowners in the decision phase rather than browsers.
Frame the measure deposit as a reservation that applies toward the project: "We confirm all measure appointments with a small deposit that applies toward your project. If you decide not to proceed after the quote, the deposit is retained as a measure visit fee." Most homeowners who are planning a window replacement in the next 60 to 90 days accept this without resistance.
What window and door installers need from booking software
For measure appointments: a booking page that collects a $75 to $100 deposit, shows real calendar availability for the measure technician, sends SMS reminders with homeowner preparation instructions, and enforces a 48-hour cancellation window automatically.
For project management after the measure: a contract management system that handles custom order tracking, production lead time monitoring, installation scheduling, and crew dispatch. Jobber and Buildertrend handle this for growing window companies. For very small installers, a spreadsheet and a contract template are often sufficient.
The best options compared
| Tool | Monthly cost | Deposits | Order tracking | Best for |
|---|---|---|---|---|
| GrabMySlot | $0 + 3% per deposit | Core feature | No | Measure appointment deposits, small installers |
| Jobber | $49 to $599/mo | Connect plan ($119/mo) | Limited | Growing window companies with multiple crews |
| Buildertrend | $199 to $499/mo | Yes | Yes | Full project management for larger operations |
| Square Appointments | Free + processing | All plans | No | Very small installers already on Square |
Installation day access requirements
Window and door installation requires more homeowner preparation than most trades. All windows being replaced need clear interior access: furniture and window treatments moved back, blinds and curtains removed or tied back, breakables off windowsills. For exterior door replacement, the entryway needs to be clear of furniture and items that would block the old door's removal path.
For full-house window replacement projects running 6 to 8 hours with a crew of two to three, an adult must be home throughout because decisions arise during installation: a window that does not fit the rough opening exactly as measured, a rotted sill plate discovered during frame removal, or a customer preference about screen installation that was not resolved at the measure visit.
Include installation day preparation requirements in your booking confirmation and in both SMS reminders. A prepared homeowner makes installation faster, cleaner, and less likely to produce a callback.
GrabMySlot is free to start. You pay 3 percent only when you collect a deposit. Set up your booking page in under five minutes at grabmyslot.com.
