How to Choose the Right Sandwich Panel Supplier for Your Project

First, decide what core material you need in your panels. EPS (expanded polystyrene) is cheap and light. Use it only in dry places where fire risk is low. Rockwool is fireproof and blocks sound well. It works for factories or places with strict fire rules. PU (polyurethane) and PIR (polyisocyanurate) are best for tight temperature control. PU keeps cold in with low thermal conductivity. PIR is like PU but better at resisting fire. Choose PU or PIR for cold rooms or cleanrooms.

Next, the steel skin matters. Check three things: thickness, zinc coating, and paint. Use steel 0.5mm to 0.6mm thick. Thinner steel dents and bends too easily. Zinc coating should be at least Z100 or Z150 to stop rust. If you are near the ocean or in humid areas, ask for zinc-aluminum-magnesium coatings—they resist rust better. For paint, polyester is okay indoors. For sun or washdowns, use PVDF or special antibacterial paint.

A good supplier will ask about your project: location, temperature needs, and how long you want it to last. They will match core thickness, steel thickness, and coating to your needs. Propanel focuses on PU and PIR panels because they work best for cold and clean rooms. They don’t just sell panels; they help you build something that lasts.

Cheapest panels cost more in the long run. Panels that fail in a few years mean more money wasted. Pick a supplier who cares about your project. Ask questions, check details, and choose a partner who supports you. That’s who you want.