Questions about the opening and framing
The rough opening is where the biggest unplanned costs hide. Get this in writing before work starts, not as a surprise mid-install.
- Will you inspect the sill, jack studs, and header for rot or moisture before quoting a final price?
- What happens to the price if you find rot once the old door is out?
- Is a new sill pan and flashing included, or is the existing sill being reused?
- Will the rough opening be checked for square and level before the new door is set?
- Are permits needed for this project, and who pulls them?
Questions about the door, glass, and finish
Confirm exactly what unit and glass you're paying for, product names and glass packages vary a lot between similarly priced doors.
- What brand and model door am I getting, and what's the warranty term and what voids it?
- What glass package is included, and is it low-E or argon-filled?
- Is the jamb depth correct for my wall thickness, or will extension jambs be needed?
- Is paint or stain finish included, or is that a separate cost?
- What hardware and lockset come standard, and what does upgrading to a multipoint lock cost?
Questions about the install itself
How the crew handles the actual install day matters as much as the door they're installing.
- How long will the install take, and will the old door be removed and hauled away?
- What's used to seal and insulate around the new frame?
- Who's doing the physical install, employees or a subcontracted crew?
- What's the warranty on labor, separate from the manufacturer's product warranty?
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Frequently asked questions
What's the single biggest red flag in a door installation quote?+
A price that doesn't mention the rough opening or sill condition at all. If a company quotes a price without ever assessing what's behind the old door, that's usually a sign they'll either lowball now and add costs later, or skip needed repairs to hit the number.
Should I get multiple quotes for a single door replacement?+
Yes, at least two or three, especially for entry or patio doors where framing condition varies a lot. For a straightforward interior door swap, one detailed quote is often enough.
Is it normal for the price to change after the old door comes out?+
It can be, if hidden rot or moisture damage is found. A trustworthy installer explains this possibility upfront and gives you a clear process for approving any additional cost before proceeding, rather than surprising you with a final bill.
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