When to use this system
The insPIRe® D panel is a self-supporting roof cladding used when we want to eliminate intermediate structural layers (purlins, boards) and replace the entire roof with one multi-functional element:
- Industrial halls and warehouses — long spans (up to 6 m between purlins), fast installation.
- Large-format retail facilities — supermarkets, discount stores, DIY centres — where construction time matters.
- Logistics and distribution centres — roof coverings with a slope of 3–5° (5.2–8.7%) without skylights.
- Renovations of old hall roofs — when the existing ceiling cannot accept additional load (the panel = covering + insulation + ceiling in one).
Geometry and load capacity
- External profile: trapezoidal (T), wave height ~38 mm — provides load capacity and water runoff.
- Internal facing profiles: linear (L) or flat (P) — an aesthetic choice for the hall ceiling.
- Modular width: 1000 mm (across the working edges of the panel).
- Panel length: 2.0–14.0 m (maximum limited by transport).
- Roof pitch: min. 3° (5.2%) without skylights in the covering; min. 5° (8.7%) for panels joined along the length (with sealing tapes at the transverse joint).
Fastening
Each panel is fastened with 2 fasteners across the width in each span (to a steel or timber purlin). In roof edge zones (corners, ridge, eaves) — +2–4 fasteners/m².
Fire classification
The system meets a dual classification:
- B-s1,d0 acc. to PN-EN 13501-1 — reaction to fire (covering side)
- B_ROOF(t1, t2, t3) acc. to PN-EN 13501-5 — performance under external fire exposure (e.g. embers from a neighbouring fire, burning fragments of roofing felt)
Coverings with a B_ROOF certificate are required for roofs of facilities listed in § 207 sec. 4 of the regulation on technical conditions — including public utility buildings and warehouses.
Required sheet metal flashings
- OB-22 / OB-23 — upper / lower ridge flashing
- OB-25 — under-gutter C-channel
- OB-31 — roof gable flashing
- OB-33 — gutter eaves flashing
Accessories
- Sandwich panel fasteners (to purlins) — typically 6×130 mm for a 100 mm panel
- Aluminium tape + PES gasket — sealing of transverse joints
Technical documentation
The system is described in the Gór-Stal Technical Catalogue 2025 (pp. 82–87). It holds CE marking acc. to EN 14509:2013, B-s1,d0 and B_ROOF(t1,t2,t3) classification, and a PZH hygienic certificate.
Layer composition
| # | Layer | Thickness | λ | Role |
|---|---|---|---|---|
| 1 | External trapezoidal facing — S220-S280GD steel sheet + 25 µm coating (T profile) | 0.4–0.5 mm | — | external load-bearing facing (roof covering) |
| 2 | PIR / PIR-MAX core (density 40 kg/m³) | 40–160 mm | 0,022 W/(m·K) | main thermal insulation |
| 3 | Internal linear or flat facing — steel sheet + 25 µm coating | 0.4–0.5 mm | — | internal facing / hall ceiling |
U-value by insulation thickness
| termPIR® thickness | U [W/m²·K] | Meets WT 2021 (roof U ≤ 0.15) |
|---|---|---|
| 40 mm | 0,55 | — no |
| 60 mm | 0,37 | — no |
| 80 mm | 0,27 | — no |
| 100 mm | 0,22 | — no |
| 120 mm | 0,18 | — no |
| 150 mm | 0,15 | ✓ yes |
| 160 mm | 0,14 | ✓ yes |
