12.5mm Marmox Fireboard - A1-Rated Fireproof Insulation Board - 1200mm x 600mm




12.5mm Marmox Fireboard - A1-Rated Fireproof Insulation Board - 1200mm x 600mm
Price: £15.50 (£18.60 inc VAT)
- Product Code: A1-6590
- Delivery Time: 1-3 working days
- Brand: Marmox (Tech. support: : 01634835290)
- Model and Size: 1200mm x 600mm - 0.72m2
- Weight: 1.35kg
Our ratings on 07-10-2025:

4.8 out of 5
12.5mm Marmox Fireboard - A1-Rated Fireproof Insulation Board - 1200mm x 600mm
Length: 1200mm
Width: 600mm
Thickness: 12.5mm
Panel Coverage: 0.72m2
Density: 150kg/m3
Weight/m2: 1.88kg
Weight: 1.35kg
Thermal Conductivity: 0.037W/mK
R-Value: 0.34m2K/W
Fire Rating (Reaction to Fire): A1(Non-combustible)
12.5mm Marmox Fireboard is a lightweight, A1-rated non-combustible insulation board that combines fire protection, thermal insulation, and acoustic performance in one render-ready panel. It’s suitable for internal and external walls and ceilings, especially in high-risk or multi-storey buildings.
CHARACTERISTICS
- Non-combustible insulation and render board
- Core Material: Marmox mineral stone wool
- Surface Finish: Polymer-modified cement coating with embedded fibreglass mesh
- A1 fire-rated for maximum protection in high-risk zones
- Weatherproof and moisture-resistant – suitable for wet environments
- Excellent acoustic insulation – reduces airborne sound transmission
- High thermal performance – helps prevent heat loss and condensation
- Render-ready surface – no pre-treatment required before plastering or rendering
- Lightweight and easy to cut – install with standard hand tools
- Compatible with Marmox washers and MSP360 adhesive
APPLICATION
- Fireproof lining for internal walls and ceilings
- External wall insulation (EWI) systems, including elevations over 18m
- Safe substrate for render finishes in multi-storey buildings
- Fire protection for SIPs panels, timber, masonry, and steel frames
- Acoustic insulation in residential and commercial settings
INSTALLATION
- Boards can be fixed directly to timber battens, masonry, or steel frames.
- Use Marmox mesh tape over joints and fix with washers at 300mm centres (600mm for thicker boards).
- Finish with plaster or render as required.
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