What Is an IFC File? A Site Team's Guide

Everyone says “IFC” and nobody has explained it to you

At the kick-off meeting someone says “the model will be delivered as IFC”. The design office mentions it like it’s obvious. The tender requires it. And at some point the file lands in your inbox — building_v7.ifc — with the silent assumption that you know what to do with it.

There’s excellent training out there for people who model (buildingSMART runs whole video series on it — start at buildingsmart.org). But almost nobody explains IFC in plain words to the people on site: the site manager, the building engineer, the installer. That’s this guide. No jargon, no snake oil — and the practical part: what you can do with an IFC without owning Revit.

IFC is the “PDF of building models”

The imperfect-but-useful analogy: when someone sends you an important document, they don’t send the Word file — they send a PDF. Anyone can open it, on any machine; it will still open in ten years; and nobody needs a licence for the program that created it.

IFC does the same for building models. It’s an open, vendor-neutral format — it belongs to no software company. A model authored in Revit, Archicad or Allplan, exported to IFC, opens in any compatible viewer. Today, and in fifteen years, when that version of that program no longer exists. That’s why public clients and the industry’s open-standards push revolve around it: a building lasts decades, and the files that describe it should too.

Like every analogy, it has a limit: a PDF is a frozen picture of a document, while an IFC carries considerably more inside. Let’s open it up.

What’s inside an IFC file

Two things — and the second one is the surprise:

• Geometry. The building in 3D: walls, slabs, columns, services, joinery. What you’d expect to see.
• Information. Every object in the model knows what it is: this wall is a wall, of this type, on this floor; this door has this dimension. The model isn’t a drawing — it’s an ordered inventory of the building.

For a field team the practical consequence is simple: an IFC isn’t “a pretty 3D” — it’s the most complete source of information you’ll ever be handed on the project. Even if you use only part of it — viewing, walking, pointing at it — that part is already worth a lot.

Why you keep receiving them

It’s not fashion; it’s the industry’s direction, with three engines:

• Public procurement. More and more public tenders require models in open formats — BIM mandates keep expanding country by country, and the reference open format is IFC.
• Interoperability. Projects with several disciplines on different software need one common exchange format. IFC is that meeting point.
• Shelf life. The owner wants a file that still opens in twenty years, hostage to no licence. Again: IFC.

Translation for you: what used to be “the BIM manager’s business” will show up on your projects more and more often. The good news: using it, in your role, is far easier than producing it.

What you can do with an IFC without Revit

This is the part almost nobody tells you. For a field team, “using the model” means four things — none of which requires authoring software:

1. Open it and walk it. With a free viewer — desktop, web or mobile. The step-by-step lives in how to open an IFC file without Revit.
2. Consult it at the workface. “How does this duct come down?” gets answered by looking at the model on your phone, standing in front of the real thing.
3. Verify against reality. Does what got built match what was modelled? With the model in your hand, that question becomes a glance.
4. Document on top of it. Mark the exact point of a problem on the model — with a photo and a voice note — instead of describing it in words in a chat.

That fourth point is where PinMy comes in: you upload the IFC, it’s converted automatically to a lightweight format for fast mobile viewing, and on the model you drop pins with photo, voice or text — the issue stays anchored to the exact point in 3D space, assigned, with a status. One honest boundary, stated plainly: a pin marks a point in space, not a model element — PinMy doesn’t read element data or properties, doesn’t version models, and doesn’t do BIM coordination. It’s field documentation on top of the delivered model — and on site, that alone changes the day, the same way not losing decisions in WhatsApp does.

What IFC won’t solve for you

Balance, because snake oil gets sold here too: IFC doesn’t make the model good (poor modelling survives the export), it doesn’t replace signed drawings as the contractual document — your contract decides that — and having the file makes nobody a BIM manager. It’s a format, not a wand. Its value appears when someone puts it where the work happens: in the field team’s pocket. The delivered model has more life in it than the industry gives it credit for — that’s the subject of the IFC model doesn’t end at handover.

FAQ

What does IFC stand for? Industry Foundation Classes: the open international standard for exchanging building models and their information, maintained by buildingSMART. In practice: the neutral format any compatible viewer can open.

Do I need Revit or a BIM licence to open an IFC? No. There are free desktop and web viewers, and PinMy opens IFC on your phone — with automatic conversion to a lightweight format — including on the free plan, within its limits.

Does IFC replace PDF drawings on site? No — they coexist: each format has its job, and most day-to-day work is still PDF. The honest comparison is in IFC vs PDF on site.

What PinMy is NOT

PinMy is the field-capture layer: PDF plans, photos, videos and 3D IFC models on your phone, with voice/photo/text pins, assignment and a Kanban board. It is not an authoring or BIM-coordination tool, doesn’t read element data, doesn’t version models, and doesn’t replace Revit or a CDE. The web PDF report is useful today and still maturing.

Next time an .ifc lands in your inbox

Don’t let it die in the email. Upload it, open it on your phone, take it to site — and send this guide to the colleague who still thinks IFC is “the BIM people’s business”.

• Start free: pinmy.co
• Book a 15-minute walkthrough: tidycal.com/pinmy