Panel sándwich de lana de roca para tejados, con aislamiento térmico e ignífugo
Glostar’s fireproof thermal insulation panel sándwich de lana de roca for roof is the trusted roofing solution for prefabricated steel buildings that demand real fire protection. A non-combustible, high-density rock wool core is bonded between color-coated steel sheets for Class A fire resistance, strong thermal insulation, and outstanding soundproofing — combined with high rigidity, effective drainage, and strong anti-negative wind pressure resistance for reliable, long-term roof performance.
Descripción
This fire resistance rock wool mineral wool sandwich panel for roof is built for buildings where fire safety cannot be compromised — factories, workshops, warehouses, and public structures that require Class A, non-combustible roofing. The sandwich panel’s profile is engineered for effective drainage even on gently sloped roofs, and its tight overlapping joints and high rigidity give it the structural performance needed to withstand wind uplift, snow load, and repeated thermal cycling over the life of the building.
Especificaciones
| Longitud | 3.5m – 11.8m (custom lengths available) |
| Width | 1000mm (effective) |
| Espesor | 50 / 60 / 75 / 100 / 120 / 150 / 200mm |
| Major Rib Height | 42mm |
| Rib Spacing | 333mm |
| Steel Sheet Thickness | 0,5 mm – 0,8 mm |
| Inner Profile | Square wave, flat |
| Pintura | Polyester PE, HDP, PVDF |
| Galvanizado | Zinc por inmersión en caliente, Al-Zn por inmersión en caliente, Zn-Al-Mg por inmersión en caliente |
| Color | Customized (RAL color chart available) |
Fire & Thermal Performance
Resistencia al fuego
| Fireproof Rating | Non-combustible material, Class A reaction to fire |
| Fire-Resistant Limit (FRL) | 30 – 240 minutes depending on panel structure and thickness. 100mm full rock wool panel: 120 minutes. |
Aislamiento térmico
| Espesor | Heat Transfer (U-value) | Thermal Resistance (R-value) |
|---|---|---|
| 50mm | 0.8 W/m²K | 1.25 |
| 100mm | 0.4 W/m²K | 2.5 |
| 150mm | 0.27 W/m²K | 3.7 |
Thermal conductivity (K-value): 0.04 W/(m·K).
What Makes This "Real Rock Wool"?
The core material is an artificial inorganic fiber produced by melting and fiberizing
high-temperature natural rock — such as gabbro and basalt — with the qualities of being
non-absorbent and containing very little slag or dust. This is genuine rock wool, not the
lower-grade slag wool sometimes substituted in cheaper panels.
Rock Wool vs. Slag Wool
| Rock Wool (Glostar core) | Slag Wool (conventional) |
|---|---|
| Non-inflammable, Class A fireproof performance | Low acidity coefficient, high dust content — corrosive to metal |
| Hydrophobic, high ageing resistance | High hygroscopicity — prone to cold-bridging and thermal decline |
| Sound absorption and noise reduction | — |
| Biodegradable and environmentally friendly | — |
| High acidity coefficient — minimal metal corrosion | — |
The acidity coefficient — defined as (SiO₂+Al₂O₃)/(CaO+MgO) — is a key indicator of a mineral
wool’s high-temperature viscosity, fiber-forming ability, and solubility. Slag wool typically
measures around 1.1, while genuine rock wool measures around 1.8. The higher CaO and MgO content
and lower acidity coefficient in slag wool is what makes it corrosive to metal facings over time
— a risk Glostar’s rock wool core is engineered to avoid. Independent hydrophobicity testing
confirms this rock wool core absorbs significantly less moisture than conventional rock wool,
protecting long-term insulation performance and preventing cold-bridge formation.
Why Choose Glostar
- Class A fire resistance: Non-combustible rock wool core with an FRL of up to 240 minutes.
- Genuine rock wool core: Made from real natural rock fiber, not slag wool, for better long-term thermal and corrosion performance.
- High rigidity and drainage: Panel profile is engineered for effective water shedding and strong structural performance.
- Anti-negative wind pressure resistance: Built to withstand wind uplift forces on large industrial roofs.
- Fully customizable: Choose thickness, steel gauge, coating, color, galvanizing type, and profile to match project specifications.
Preguntas frecuentes
What is the fire-resistant limit (FRL) of this roof panel?
FRL ranges from 30 to 240 minutes depending on panel structure and thickness. A 100mm full rock wool panel achieves an FRL of 120 minutes.
Is this real rock wool or slag wool?
This is genuine rock wool, produced by melting and fiberizing natural rock such as gabbro and basalt at high temperature, with an acidity coefficient around 1.8 — far higher than the roughly 1.1 typical of lower-grade slag wool.
Why does the acidity coefficient matter?
A higher acidity coefficient means less corrosive impact on the panel’s metal facings and better long-term durability. Slag wool’s lower coefficient and high CaO/MgO content make it corrosive to steel over time.
What thickness options are available?
Standard thicknesses range from 50mm to 200mm, allowing fire resistance and thermal performance to be matched to project requirements.
Is the panel suitable for high-wind or heavy-snow regions?
Yes. The panel’s rigidity and profile design provide strong anti-negative wind pressure resistance and effective drainage, making it suitable for demanding climates.
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