What light gauge steel is really good for
The first argument: the wall is half as thick
Section titled “The first argument: the wall is half as thick”It delivers the same thermal and acoustic performance from roughly half the wall thickness of traditional construction. The exact ratio depends on the build-up, but that is the order of magnitude.
This is not an aesthetic detail. On a plot with a fixed permitted footprint, wall thickness is usable floor area directly: several square metres per flat in an apartment building, a whole room’s worth in a house. Comparing wall thicknesses.
The second argument: a more durable structure
Section titled “The second argument: a more durable structure”Not “also good” but better than most alternatives:
- it does not take up moisture, so it does not swell, warp or crack the finishes,
- it is made to machine accuracy, to the same quality in series,
- it does not rot and insects do not eat it,
- its build-up can be tuned freely to the real requirements, rather than being dictated by the masonry material.
Price: real, but only the third argument
Section titled “Price: real, but only the third argument”On the material cost of the structure, 40% can be saved with an optimised design compared with an over-sized one. With precise build-ups the material cost can be lower than a brick-plus-insulation solution too.
That is still not why to choose it. Anyone who looks only at the price list will buy the cheapest build-up — and lose exactly the quality the technology is good for.
Speed: the fourth argument
Section titled “Speed: the fourth argument”Site work is short and less weather-dependent. A real advantage, but not the decisive one: the design takes correspondingly longer, because every decision has to be made before manufacture here.
Where it is clearly the right choice
Section titled “Where it is clearly the right choice”Rooftop additions and extensions
Section titled “Rooftop additions and extensions”No competition here: the reserve capacity of the existing structure is tight, and the low self-weight decides it. Rooftop additions.
Buildings repeating in series
Section titled “Buildings repeating in series”The design is produced once and manufacture multiplies it accurately. A hotel, a hall of residence, a terrace: this is where prefabrication really pays back.
Tight or hard-to-reach sites
Section titled “Tight or hard-to-reach sites”Little storage, a small crane, dry technology. On an inner-city infill plot that is often not an advantage but a condition.
Where use of space is money
Section titled “Where use of space is money”A fixed permitted footprint, expensive square metres.
Complex geometry
Section titled “Complex geometry”Because of machine cutting, a complicated shape costs no more — it only takes more design work. Trusses.
The condition underlying all of them
Section titled “The condition underlying all of them”All of this holds when it is designed. This technology gives more for good design than traditional construction — and forgives less bad design. It has no reserve from mass to hide a mistake.
The point
Section titled “The point”Use of space and durability: those are the two arguments. Anyone promising speed and cheapness first is not selling this technology but the appearance of it.