Most metal building kits do not include doors and windows in the base price. The base kit is the engineered steel shell, and doors and windows are add-on options you select and pay for on top of it. Many suppliers will build a complete package when you ask, framing the openings into the steel and shipping the doors and windows with the kit, but a bare shell quote almost always leaves them out.
That split is why two kits with the same square footage can quote thousands of dollars apart. This page sits under the metal building kits pillar and walks the full picture: what a base kit covers, which openings you can add, and why you order them with the kit instead of cutting them in later. For the deeper buyer’s guide to selecting them, see metal building doors and windows.
What’s standard
What a base kit covers by default
A base kit is the weather-tight steel shell and nothing inside it. You get the primary frame, the secondary framing, the roof and wall panels, the fasteners, the trim, the anchor bolts, and a stamped set of drawings. Doors and windows sit outside that scope, so a wall ships as solid panel unless you specify an opening. That is the same reason a kit leaves out the slab, the insulation, and the interior finish: the factory builds the steel, and you choose the rest.
There is one detail buyers miss. A kit can include the framed opening without including the door itself. When you tell the supplier where a roll-up or walk door goes, the engineer designs the header and jamb steel into that wall, and the shell ships ready for a door you buy elsewhere. So “included” has two meanings worth separating on a quote: the framed opening, and the door unit that fills it. The what is included in a kit breakdown covers the rest of that line.
The options
Doors and windows you can add to a kit
You add openings by type, and each one carries a different price and framing job. A roll-up door for a shop bay costs and weighs more than a single walk door, and a window needs flashing the others do not. Here are the common options and what to know before you spec them:
| Opening | What it is | What to weigh |
|---|---|---|
| Roll-up / overhead door | Sectional or rolling steel door for vehicle bays | Sized in feet; wider and taller doors add header steel and cost |
| Walk door | Standard 3-foot steel man door | The cheapest opening; one or two are near-standard on most builds |
| Sliding / barn door | Track-hung door for ag and large openings | Good for wide openings with no headroom for a roll-up |
| Windows | Fixed or sliding units set into a wall panel | Need flashing and trim; placement is locked once the wall is framed |
| Framed opening only | Reinforced opening with no door supplied | Lets you source the door unit yourself; the steel still must be engineered |
Common kit add-ons. Prices and framing vary by size, so confirm each line on your quote rather than assuming it is in.
Number and size drive the cost more than the door type. A shop with three 12-foot bay doors and a row of windows can add several thousand dollars ‹confirm› to a base shell, while one walk door barely moves the total. Heavier openings also pull more wind load on the wall, which is part of why the supplier engineers them up front rather than leaving you to customize the shell after the fact.
Order up front
Why you spec openings with the kit, not after
Order doors and windows with the kit because the openings have to be engineered into the steel, not cut into it later. Every opening interrupts the frame and the panels, so the drawing has to add header and jamb members to carry the load around the gap. Decide where the doors and windows go before the kit is fabricated, and the steel arrives punched and labeled for them. Decide after, and you are field-cutting panels and adding reinforcement on a shell that was not drawn for it.
Cutting in later costs more
You can add an opening to a finished building, but it means cutting panels, framing a header on site, and reflashing the cut. The work is slower and the seal is rarely as clean as a factory opening. It can also affect the load path, so check with the engineer and your local building department before a saw touches a structural wall.
Placement matters as much as count. Once a window or door is framed into a wall, moving it means new steel, so settle the floor plan, the door swings, and the sightlines before you sign. A few minutes with the elevation drawing saves a change order later. If you are comparing two suppliers, the quote-reading guide shows where openings hide on the spec sheet.
On the quote
How to check whether a quote includes doors and windows
Read the line items, not the headline. A low kit number often wins by leaving doors and windows out, so the only honest comparison lines up what each quote frames and supplies. Three checks settle it:
- Count the openings. The spec should list each door and window by size and type. No list usually means a solid-wall shell with no openings priced in.
- Separate the opening from the unit. Confirm whether the price covers the framed opening only, or the door and window units too. The wording “framed opening” means you still buy the door.
- Match before you compare. Put the door and window schedules side by side before you read the totals. A cheaper kit with no openings is a different building, not a better deal.
Doors and windows are where a low shell price hides its real cost. Read the opening schedule first, and the totals start telling the truth.
Related
Read more
What a kit includes for openings connects to the rest of the buying decision. Follow these next:
- Metal building kits: the complete guide (the parent pillar).
- Metal building doors and windows (types, sizing, and how to choose).
- What is included in a metal building kit (the full parts list).
- How to read a metal building quote (where openings hide on the spec).
- Custom vs standard metal building kits (how far you can tailor the shell).
