Light gauge steel
Light Gauge Steel Framing, Explained Honestly
Light gauge steel framing (cold-formed steel, CFS) is one of the main structural systems in factory-built housing. ifHaus does not build with it: our homes use a composite modular panel system. This page explains how light gauge steel works, which standards govern it in North America, and exactly where our composite system differs, so you can compare both with clear eyes.
What is light gauge steel framing?
Light gauge steel framing builds a structure from cold-formed steel profiles: thin sheet steel, galvanized and roll-formed into C and U shaped sections, assembled into wall panels, floor joists and roof trusses. It is the steel cousin of timber stud framing, with members that do not warp, rot or feed insects.
Its strengths are real: a high strength-to-weight ratio, dimensional consistency and good behaviour under seismic load thanks to low mass and ductile, screwed connections. Its demands are also real: insulation must be layered onto the frame with care because steel conducts heat, so thermal bridging is managed with detailing; and corrosion protection depends on coating quality.
ifHaus takes a different route. Instead of a steel skeleton with infill layers, our system carries the load through composite panels whose insulation sits in the core, arranged on a 1x1 metre modular grid, produced as room-scale modules with interiors finished in the factory.
The two systems at a glance
The practical differences, component by component:
| Load path | LGS: profile skeleton carries the load, walls are infill. ifHaus: the insulated composite panel itself is load-bearing. |
|---|---|
| Insulation | LGS: layered on afterwards; thermal bridges managed by detailing. Composite: insulation in the panel core from production. |
| Corrosion | LGS: protected by galvanic coating; longevity depends on coating quality. Composite: the material does not rust. |
| Production depth | LGS: panels or frames from the factory; much interior work often on site. ifHaus: modules leave the factory with interiors finished. |
| On-site phase | LGS: frame rises fast, finishing takes the time. ifHaus: on-site assembly 3-5 days, no crane or heavy machinery needed. |
| Certification | Both live or die by testing. The ifHaus composite system is seismic and fire tested with Class-A CE certified materials. |
Component-level comparison of light gauge steel framing and the ifHaus composite modular system.
Standards and honesty
In North America, light gauge steel structures are governed by AISI standards (notably AISI S240 for structural framing) alongside the IRC and IBC model codes; galvanic coating classes and profile thicknesses are specified per project by the structural engineer.
Where does ifHaus stand? Outside the steel category, honestly: we do not manufacture light gauge steel homes, and we do not claim certifications we do not hold. Our composite modular system is tested for seismic and fire performance and built with Class-A CE certified materials on a Türkiye production basis. Whichever system you evaluate, apply the same test to every seller: ask for the engineering, the test reports and the certificates.
If you choose light gauge steel
Ask for the profile wall thickness, the galvanizing class, the stamped structural design for your site, and how thermal bridging is detailed.
If you choose composite modular
Ask for the panel build-up, insulation values, seismic and fire test reports, and a written scope list with the delivery schedule.
Either way
Compare quotes on the same scope: structure, installations, interior finishes and assembly. A frame-only price is not a home price.
Light gauge steel vs composite modular, line by line
The decision usually comes down to these lines:
| Criterion | Light gauge steel framing | ifHaus composite modular |
|---|---|---|
| Structure | Cold-formed steel skeleton | Load-bearing composite panels, no skeleton |
| Insulation continuity | Layered; bridges managed by detailing | In the panel core; continuous by design |
| Corrosion maintenance | Depends on coating quality | Not applicable; material does not rust |
| Factory-finished interiors | Varies by manufacturer | Standard: bathrooms and kitchens finished in factory |
| Typical turnkey timeline | Project-dependent | About 3-4 weeks from contract |
| Price transparency | Quote-based in most of the market | Live public price list per model |
Both systems can produce a good home; the difference is where the risk and the work sit.
Who tends to choose which?
Patterns we see across projects:
Light gauge steel fits when
The design needs unusual spans or a local engineering ecosystem is already built around CFS; buyers accept managing finishing work on site.
Composite modular fits when
Speed, insulation continuity, low maintenance and a fixed published price matter most; the home is a permanent residence delivered turnkey.
Neither fits when
Designs that must change mid-build: factory systems reward early decisions. Classic volumetric systems also require crane access; the ifHaus composite system installs without cranes or heavy machinery, so that constraint does not apply to us.
Frequently asked questions
Does ifHaus build with light gauge steel?
No. ifHaus homes are built with a composite modular panel system, not a steel frame. We keep this page because many buyers research light gauge steel while comparing factory-built options, and we would rather explain the differences honestly than blur them.
Is light gauge steel framing a good system?
It can be. It is light, dimensionally stable and behaves well seismically when engineered properly. Its quality depends on profile thickness, coating and detailing, especially around insulation. Judge any LGS offer by its engineering and test documents.
What are the advantages of the composite modular system?
Insulation sits in the panel core, so layer continuity is built in; the material does not rust; modules leave the factory with interiors finished, which compresses the on-site phase to days; and pricing is a published list. The system is seismic and fire tested with Class-A CE certified materials.
Which one is cheaper?
Scope decides. Frame-only steel quotes look cheap but exclude most of the home. Compare turnkey against turnkey: the ifHaus composite list starts around $20,000 (999,000 TL) on a Türkiye production and delivery basis, published openly per model.
Comparing systems for a project?
Tell us the location and scale; we will share the composite system detail, the test documentation and a clear turnkey scope so you can put it next to any steel quote.