EPS VS PU VS Rockwool Sandwich Panel Comparison
📋 Core Parameter Comparison Table
| Comparison Item | EPS Sandwich Panel | PU Sandwich Panel | Rockwool Sandwich Panel |
|---|---|---|---|
| Core Material | Expanded polystyrene bead foam | Closed‑cell polyurethane foam | Basalt rockwool fiber |
| Thermal Conductivity | 0.035‑0.041 W/(m·K) | 0.022‑0.026 W/(m·K) | 0.040‑0.045 W/(m·K) |
| Water Absorption🔧 | High, water vapor penetrates bead gaps | Low, complete closed‑cell structure | Relatively high, water retained in fiber gaps |
| Fire Rating | Class B2/B3 combustible | Class B1/B2 | Class A non‑combustible |
| Anti‑aging Performance⏳ | Prone to aging under high‑humidity conditions | Good resistance against moisture aging | Performance degrades obviously after moisture absorption |
| Debris‑shedding Resistance | Easy to shed foam beads under impact | Dense surface, hardly sheds debris | Likely to release fiber debris under force |
| Cold‑storage Suitability❄️ | Not recommended, energy consumption rises after water absorption | Highly suitable for low‑temperature cold storage | Usable with strict moisture‑proof treatment |
| Clean‑room Suitability🏥 | Not recommended, dust and bead residue risk | Suitable for dust‑free purification projects | Available for fire‑proof clean‑rooms with proper edge sealing |
| South‑China High‑humidity & Salt‑spray🌫️ | Service life decreases greatly | Overall performance is excellent | Reinforced waterproof edge sealing is required |
| Overall Purchase Cost💰 | Low | Medium | Medium‑high |
✅ Advantages for each panel EPS Sandwich Panel📌 It features competitive purchase cost, light weight and convenient processing. It fits temporary factories, simple warehouses and site fences under dry conditions. It shows obvious limitations for long‑term high‑humidity, low‑temperature and purification scenarios.
PU Sandwich Panel🛡️ Closed‑cell structure brings low water absorption and outstanding thermal insulation, hardly shedding debris. It works well for cold storage, food & pharmaceutical factories and clean‑room renovation. As a Foshan‑based source manufacturer, SAMZOON provides customized stainless‑steel composite PU sandwich panel, free samples and construction guidance, with abundant finished cases across South China.
Rockwool Sandwich Panel🔥 It achieves Class‑A fire‑proof performance, ideal for factories with strict fire regulations. Its main weakness is high water absorption. Insulation performance drops after getting wet. Edge sealing must be done thoroughly for clean‑room usage to prevent fiber leakage.
⚠️ Scenario‑based Selection Advice
- 🧱 Temporary site fence & dry simple warehouse: Choose EPS sandwich panel for cost‑saving purpose;
- ❄️ Cold‑storage, low‑temperature warehouse & South‑China coastal high‑humidity factory: Prioritize PU sandwich panel;
- 🏥 Medical & food clean‑room: PU sandwich panel is preferred. Rockwool sandwich panel with complete edge sealing is acceptable for strict fire‑proof requirements;
- 🔥 Strict fire‑protection requirement without continuous high‑humidity: Select rockwool sandwich panel;
- 🔄 Old factory & cold‑storage retrofit: It is not advised to keep aged EPS sandwich panel; evaluate replacement with PU sandwich panel.
Note: No single panel fits all projects. Make comprehensive decision according to fire rating, humidity‑temperature condition, budget and expected service life. For complex working‑condition projects, SAMZOON offers selection assessment, fast‑track production and acceptance‑related technical support.
