Doors and Windows for Modular Buildings

Steel, wood, sliding and roll-up doors, hardware and access control, window styles and glazing, transaction windows for booths, and fire, sound and ballistic rated openings.

Call (800) 326-4403 or email Sales@MH-USA.com

Tan modular office with a dark steel door with a vision light and two sliding windows

Steel or Wood

Personnel Doors

Sliding or Fixed

Window Styles

Transaction

Windows for Booths

Rated Options

Fire, Sound, Ballistic

Openings make the building work

Doors and windows decide how a modular building is used. A supervisor office needs a long window line toward the floor; a quality lab needs a door that seals; a shipping office needs a pass-through window for drivers; a guard booth needs glass on every side and a transaction window at the right height.

Openings are framed into the wall panels at the factory, so their sizes and locations are set on the drawings. Getting them right up front is the simplest way to get a room that works.

Modular shipping office with a door and windows behind yellow guardrail

This guide covers door types, hardware and access control, window styles and glazing, booth transaction windows and rated openings. Visit the in-plant buildings hub for building types.

Door options

Door type Where it fits Notes
Steel door, solid or with vision light Plant-floor offices, enclosures, booths Durable; vision light lets people see who is coming
Wood-veneer door Supervisor offices, conference rooms Warmer look for office areas
Half-glass or full-glass door Offices that need light and visibility Glazing chosen for safety and privacy
Double doors Equipment rooms, break rooms, cleanroom pass-ins Wider opening for carts and equipment
Sliding door Tight aisles, booths No swing into traffic
Roll-up door Equipment enclosures, storage rooms Large openings for forklifts and machines
Fire-rated door assembly Rated walls and separations Door, frame and hardware listed together
Ballistic door assembly Rated booths and secure rooms Matches the wall level; see the ballistic ratings guide
Long white modular enclosure with a roll-up door and windows inside a plant

Large openings for equipment

Equipment rooms and storage enclosures often need a roll-up door or double doors so forklifts, carts and machines can get in. These openings are framed into the panel system with headers sized for the door, and are protected with bollards on each side.

See modular equipment enclosures.

Hardware and access control

🔑

Locksets

Lever handles (easier to use and common for accessibility), keyed office, storeroom or privacy functions.

🚪

Closers and stops

Closers keep doors shut for HVAC and security; stops protect the wall panels.

🔐

Access control

Keypad, card reader or electric strike prep, with conduit to your security system.

🚨

Exit hardware

Panic devices where occupancy or code requires them.

🧹

Kick and push plates

Protect doors that get cart and boot traffic.

💨

Seals and sweeps

Keep dust, noise and drafts out; important for quiet and clean rooms.

In-plant office door opening onto a walkway protected by yellow guardrail and bollards

Doors that open onto a forklift aisle are a safety risk. Plan a protected landing with guardrail or bollards so people do not step straight into traffic. Our forklift protection guide covers door placement and protection.

Windows and glazing

Two-story modular office with dark glass curtain walls inside a warehouse

Window styles

Fixed windows give the most glass and the best view of the floor. Horizontal sliding windows let staff talk to people outside or pass paperwork. Window height and length are set in the panel layout: a continuous window line along the plant side is common for supervisor offices.

Glazing Use
Tempered safety glass Standard for most interior windows
Laminated glass Better sound control and stays in place if broken
Tinted or low-e glass Sun control for booths and exterior buildings
Insulated glass units Exterior buildings and temperature-controlled rooms
Fire-rated glazing Windows in rated walls, as part of a listed assembly
Ballistic glazing Rated booths and secure rooms, matched to the wall level

Privacy options include integral blinds, frosted film and solid panels on part of the wall. Office glass partitions are shown on the in-plant offices page.

Transaction windows for booths and shipping offices

Three finished white prefabricated booths with sliding windows standing on a factory floor before shipping

Guard and parking booths and shipping offices often need a transaction window: a sliding or fixed window with a shelf, a speak-through or a deal tray where staff exchange paperwork, badges or payments. Set the sill at car or truck-cab height on the driver’s side, and add a second window if traffic comes from both directions.

See prefabricated guard booths and the guard booths hub.

Small attendant booth at a parking entrance with a solar panel canopyParking and cashier boothsTransaction windows, cash drawers and good visibility for lot and garage entrances.
Ballistic-rated prefabricated inspection booths with steel-framed doors at a vehicle laneInspection and checkpoint boothsRated doors and windows at vehicle lanes for secure sites.
Small olive modular shipping office with a door and windows in a warehouseShipping officesPass-through windows let drivers hand over paperwork without entering the warehouse.

Related guides: wall panels, custom finishes, fire suppression and rated assemblies and the maintenance guide for door adjustment.

Placement tips for doors and windows

Two-story modular office with black trim and an exterior steel stair inside a warehouse

Put the door where people already walk, but not straight onto a forklift aisle. Face the window line toward the work you need to watch: the dock doors, the production line or the gate. In booths, put the transaction window on the driver’s side and give the officer a clear view of the approach.

Leave wall space for desks, files and whiteboards. A room that is all glass has nowhere to put a monitor or a cabinet.

  • Accessibility: door width, lever hardware and a level or ramped threshold where the room must be accessible.
  • Swing: doors swinging out into an aisle can strike passers-by; consider an in-swing, a sliding door or a protected landing.
  • Privacy: blinds or frosted glass for HR, first aid and lactation rooms.
  • Sun: tinted or low-e glass and overhangs for exterior buildings and booths.
  • Future changes: a solid panel can be swapped for a window panel later, but it is easier to plan now.

Frequently asked questions

What doors are available for modular offices?
Steel doors with or without a vision light, wood-veneer doors, half- or full-glass doors, double doors, sliding doors, roll-up doors for equipment rooms, and fire-rated or ballistic door assemblies.
Can windows be added to a modular office later?
Yes, by swapping a solid panel for a window panel. It is simpler and cheaper to set window locations on the original drawings.
What is a transaction window?
A sliding or fixed window with a shelf, speak-through or deal tray where booth or shipping staff exchange paperwork, badges or payments with people outside.
What glass is used in modular office windows?
Tempered safety glass is standard. Laminated, tinted, insulated, fire-rated and ballistic glazing are available for sound, sun, exterior, fire and security needs.
Can modular doors have card access?
Yes. Doors can be prepared for keypads, card readers or electric strikes, with conduit to your access control system.
How do I keep an office door safe on a busy forklift aisle?
Place the door away from the aisle where possible and add guardrail or bollards to create a protected landing.

Lay out the doors and windows

Tell us how the room is used and where traffic flows. We will place doors and windows on the drawings and quote your configuration.

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