Window Schedule Planning for Multi-Unit Residential Projects

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A window schedule is a single document that lists every window and door in a building by location, size, type and finish, and it becomes the basis for measurement, production and installation. For multi-unit projects, planning it early and repeating the same unit types across floors keeps production efficient and avoids site surprises.

Why a Window Schedule Matters in Bulk Orders

When a building has dozens of apartments, each with several openings, small differences add up quickly. A window schedule records every opening by floor, unit and wall, so the factory produces exactly what the site needs. Belgian steel-look profile windows and doors are made to measure, which makes accurate planning especially important.

A clear schedule also helps the building committee, architect and contractor review the same information before anything is built.

Preparing the Schedule from Drawings

Start with the architectural elevations and floor plans. Group openings by unit type first, since many apartments on a floor often share identical windows and balcony doors. Give each opening a code, such as a unit letter, floor number and sequence number.

Opening code and location
Type: window, balcony door or entrance door
Opening size and sill height
Opening direction and finish

On-Site Measurement Before Production

Drawings show intent, but walls are rarely perfectly square after construction. Our team measures each opening on site, usually after the rough masonry is complete and plumb. Measurements are recorded against the schedule code so each unit can be traced back to its location.

Where units repeat, we often measure a sample of identical openings and check them against the drawings, then confirm the rest before production begins.

Drawings, Specification and Client Approval

After measurement, we prepare shop drawings and a written specification that list profiles, glazing, hardware, opening directions and finish. The developer, architect or building committee reviews and approves this package in writing. Approval at this stage prevents costly changes after production starts.

Any change to a unit type should be reflected in the schedule and reissued to everyone involved.

Production and Finishing in the Factory

Once approved, windows and doors are produced in batches by unit type, which keeps the process consistent across the project. Finishing steps such as hot-dip galvanizing and powder coating are scheduled so that each batch is ready when the site needs it.

Working from a locked schedule lets us keep the sequence of units clear and reduces the risk of mixing up openings.

Installation Sequence on Site

Installation follows the schedule floor by floor, with each frame labeled by its code. Delivering in the order of installation reduces handling on site and keeps the building protected. The site team checks each opening against the approved specification before fixing the frame.

Clear labeling and a shared schedule make it easier for the contractor to coordinate the work with other trades.

Frequently asked questions

What should a window schedule include?

It should include an opening code, location, opening type, size, sill height, opening direction, glazing and finish. Each item should match the approved drawings and specification.

Should measurements be taken before or after the drawings are finished?

Measurements are best taken on site once the masonry is complete and plumb, then checked against the drawings. This avoids producing frames that do not fit the actual openings.

Can identical units use one specification?

Yes, identical unit types can share one specification, but each unit should still be measured or sampled. Confirming the openings prevents surprises on site.

What happens if a change is needed after approval?

The schedule and specification should be updated and reissued, then re-approved in writing. This keeps production and installation aligned with the current plan.

Common mistakes to avoid

Developers often order from preliminary drawings without site measurement, or let unit changes go untracked across floors. Both lead to frames that do not fit and avoidable rework.

Our recommendation

Lock the window schedule and specification in writing before production starts, and require every change to be reissued and approved. Measure a sample of each unit type on site, then confirm the rest before the batch is made.

Summary

A well-planned window schedule links drawings, site measurement, approval, production and installation into one traceable process. For bulk residential projects, it is the key to a smooth, predictable build.

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