What the number describes
When a spec sheet says 80 mm PUF panel, it's describing the thickness of the insulating core — rigid polyurethane foam between two steel skins. The steel gives the panel its strength. The foam is what keeps the heat out.
Why thickness matters
Polyurethane foam is one of the most effective insulation materials used in building, with a thermal conductivity of roughly 0.022 W/m·K. The thicker the core, the slower heat moves through the wall. Going from a 50 mm core to 80 mm cuts the heat passing through the panel by a little over a third.
What that feels like on site
In a Chennai summer, a thin-walled cabin in direct sun is an oven by early afternoon, and the air-conditioning never catches up. With an 80 mm core the inside stays steadier, the AC cycles less, and the people inside notice by lunchtime.
- Lower cooling loads, so smaller AC units do the job
- Less condensation on inside surfaces in humid weather
- Better sound insulation from generators and site traffic
- A more even temperature through the day
Insulation is the one spec you can't upgrade later without rebuilding the wall.
Fourwalls engineering team
When 80 mm is more than you need
Not every cabin needs it. A security cabin that's mostly open door, or a store room nobody sits in, can use a thinner panel and save money. We match the panel to how the space will be used, and we'll tell you when the cheaper option is the right one
