Most procurement managers pick EPS panels because the upfront invoice looks cheaper, but they ignore the hidden energy bleed that destroys margins over a 10-year cold storage panel TCO calculation PUR vs EPS cycle. At -25°C, the thermal conductivity gap isn’t just a spec sheet detail—it translates to thousands of dollars in wasted electricity and…
Sandwich panel types are not interchangeable commodities. Choosing the wrong core material for a specific building envelope creates long-term liability for procurement managers and contractors. Rax Panel manufactures these composite materials daily, and the difference between a successful project and a warranty nightmare often comes down to one specific metric: core density. This guide moves…
Walk any trade show floor in 2026 and you’ll hear the same conversation at booth after booth — a procurement manager holding two sample swatches, trying to decide whether their next build calls for an FRP honeycomb panel or a conventional aluminum alternative. Most suppliers hand over a spec sheet and move on. That spec…
Most procurement specs treat sandwich panel core types as the main decision — EPS, PIR, mineral wool — then accept whatever steel facing thickness the supplier ships. That’s backwards. The gap between 0.4mm and 0.8mm facing steel dictates fastener pull-out strength and panel rigidity more than any core selection does. After 15 years building these…
Most spec sheets obsess over face sheet thickness. That is the wrong metric. Core density and foil thickness dictate almost all the structural behavior, and too many builders learn this lesson only after point-load denting appears in the field. At Rax Panel, our engineers spend most of their time correcting these exact material assumptions. When…
The 20ft vs 40ft container house decision trips up more builders than any other spec in modular construction. Most assume the smaller unit is automatically cheaper. The numbers disagree. A used 20ft container runs $1,500 to $3,000, while a 40ft sits at $2,500 to $4,500 — double the floor space for roughly 50% more cash.…
If you’ve sourced composite panels for a European client and received different documentation from your US supplier, you’ve hit the naming wall. GRP meaning in composites is simple — glass-reinforced plastic. But GRP is a subset of FRP. All GRP uses glass fiber. FRP can also mean carbon fiber or aramid reinforcement. That naming split…
Most engineers still spec honeycomb panels the way they spec solid plate steel — add 20% thickness, call it safe. That approach wastes material budget and still misses the real failure risks. Honeycomb core panel strength isn’t a single-variable equation where thicker always wins. It’s a multi-variable system where core geometry, material selection, bonding quality,…