Let’s talk about how you deduct window and door openings.

  • Let’s talk about how you deduct window and door openings.

    Posted by Troy DeGroot on October 19, 2026 at 7:19 am

    I hear this one a lot, and I think it’s one of the most relatable frustrations in wall and finish takeoffs. You measure the elevation, you feel good, and then a little voice in the back of your head asks, “Did I take out every opening?” With three windows, it’s easy. With sixty across four elevations, you start wondering if the number on your screen is a number or a hope.

    So I’m curious how you handle deductions:

    • Cut them out of the area as you go

    • Measure the openings separately and subtract at the end in Excel

    • Just consider it waste and move on.

    • Something else entirely (I’d love to hear it)

    And the one I really want to hear about: what’s your last check before that number goes into the bid?

    No
    wrong answers. If you’re newer to takeoffs, this is a great place to ask your
    own questions too. Come learn alongside the rest of us.

    Troy DeGroot replied 6 hours, 54 minutes ago 2 Members · 2 Replies
  • 2 Replies
  • Vince

    Member
    October 19, 2026 at 10:08 am
    Points: 16,970
    Rank: UC2 Brainery Advanced Blue Belt I UC2 Brainery Advanced Blue Belt I

    I’ll measure the elevations to a building and then do cut outs for the window & door openings.
    I then use new markup tools to fill in the cut outs. The area of a window or door obviously isn’t of much use if you’re a bricklayer, cladder, etc. but you can then use these markups to automatically generate information such as the number of formers, lintel details, dpc trays, cavity closers to reveals, etc..

    • Troy DeGroot

      Organizer
      October 20, 2026 at 12:18 pm
      Points: 30,473
      Rank: UC2 Brainery Advanced Brown Belt II UC2 Brainery Advanced Brown Belt II

      Good use for those cutout measurements. Do you hold the Shift Key to fill them all with one click?

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