Fire‑Retardant P5 Structural Board for Interior Applications
In this product focus article, we take a closer look at HydroFlam®, a fire‑retardant, moisture‑resistant structural chipboard developed for interior construction where fire performance and dimensional stability are key requirements.
HydroFlam is an MUF‑glued P5 structural board designed for use in service class 1 and 2 environments, offering reliable performance in areas exposed to elevated atmospheric humidity while meeting strict European fire standards.
Fire Performance and Safety
HydroFlam achieves a reaction to fire classification of B‑s2, d0 in accordance with EN 13501‑1. This means the board offers:
- Limited contribution to fire
- Low smoke development
- No flaming droplets
In the event of fire, HydroFlam is designed to self‑extinguish once the heat source is removed and retains its mechanical strength for an extended period, helping to support structural integrity in safety‑critical situations.
Moisture‑Resistant P5 Structural Performance
As a P5 structural chipboard, HydroFlam is suitable for load‑bearing applications in interior environments where moisture resistance is required.
Key performance characteristics include:
- Minimal expansion and swelling under high humidity
- Stable structural performance over time
- Suitability for biological hazard classes 1 and 2 (EN 335‑3), provided the board is protected from direct water contact
This makes HydroFlam particularly suitable for interior flooring and structural applications in damp or variable conditions.
Typical Applications
HydroFlam is commonly specified in fire‑sensitive interior areas, including:
- Structural flooring and subfloors
- Stairwells and escape routes
- Corridors and circulation areas
- Lift shafts and service risers
- Fire‑rated wall and floor constructions
It is suitable for use in commercial buildings, residential developments, and public sector projects, where compliance with fire regulations is essential.
Sustainability and Standards
HydroFlam is manufactured by UNILIN Panels, with a commitment to sustainable forest management. The product is available on request with FSC® or PEFC certification and meets formaldehyde emission class E1 as defined in EN 312.
Product Data Sheet
For full technical data, test results, and compliance information, please refer to the manufacturer’s datasheet:
Stocked Product Specification
We stock HydroFlam® 22mm T&G structural chipboard, manufactured to suit flooring and structural applications:
- Thickness: 22mm
- Board size: 2400 × 600mm
- Edge profile: Tongue and groove
- Product class: P5 structural chipboard
- Fire classification: B‑s2, d0
The tongue‑and‑groove profile provides improved load distribution and a secure fit, making this board well suited to structural flooring systems where fire performance is required.
Speak to Our Team About HydroFlam
If you’re specifying or sourcing a fire‑retardant structural chipboard, our team can help you find the right solution for your project.
We can provide guidance on:
- Product suitability for specific applications
- Fire performance and compliance requirements
- Available sizes, thicknesses, and lead times
- Pricing and supply options
Whether you’re working on a commercial development, residential project, or public sector build, we can support you with practical advice and reliable supply.
Contact us today to discuss your requirements or request a quotation.
