Last year a boat builder in the Pacific Northwest ate $1.8 million in warranty claims after hull delamination. The cause was a core material substitution. A supplier swapped 200 kg/m³ PET foam for 120 kg/m³ stock without flagging the change. Sixteen vessels developed core-skin disbonding within 800 hours of service. Selecting marine core materials without…
Three months ago, a distributor in Southeast Asia watched a client’s sandwich panel cold storage project sit half-finished because the manufacturer shipped EPS core panels instead of the PIR specified on the purchase order. The fire rating certificates didn’t match. The inspector red-tagged the entire build. That single substitution cost the distributor their margin on…
Most suppliers quote PP honeycomb panel weight savings as “up to 80% lighter than aluminum.” The real number is more specific. PP honeycomb mass runs approximately 1/32 the mass of aluminum at the same volume, with densities as low as 0.3g/cm³. That weight advantage only matters if you understand the material’s thermal limits. Here’s what…
Most warehouse roof panel specifications are written backwards. Unit price leads the conversation, and insulation core selection becomes an afterthought. The core material you choose — PIR, PUR, mineral wool, or EPS — drives thermal performance, condensation behavior, and fire code compliance for the service life of the building. Selecting panels by upfront cost alone…
The polyurethane foam core drives cold room efficiency, yet it often becomes the primary source of procurement budget errors. Rax Panel manufactures high-quality PU foam core sandwich panels using advanced production lines with a daily output exceeding 1,700 square meters, ensuring a strong closed-cell structure that blocks moisture and maintains thermal integrity for decades. Getting…
Choosing between an insulated commercial door and a standard single-skin panel often comes down to whether you want to absorb utility spikes today or lock in predictable operating costs tomorrow. An insulated commercial door is made of two layers of steel that are designed to surround the layer of insulation, creating a sealed thermal barrier.…
Relying on single-skin corrugated steel to manage internal climate creates a critical failure point in thermal efficiency. While durable, bare metal transfers heat rapidly, turning the building envelope into a radiator during summer and a heat sink in winter. Insulated panels solve this by integrating the thermal barrier directly into the structural skin, ensuring the…
WhatsApp us