140mm STEICOflex 036 Wood‑Fibre Insulation Slab - 1190mm x 375mm - Pack of 4

140mm STEICOflex 036 is a flexible, high‑performance wood‑fibre insulation slab designed for exceptional thermal comfort, acoustic absorption and healthy building performance. Made from sustainably sourced wood and certified to rigorous European standards, it offers one of the best thermal conductivities available in natural fibre insulation, making it a premium choice for energy‑efficient construction. STEICOflex 036 is a soft, flexible insulation batt manufactured from natural wood fibres. Its dense yet elastic structure allows it to friction‑fit tightly between studs, rafters and joists, eliminating gaps and thermal bridges. The material is vapour‑open, helping buildings regulate moisture naturally and supporting a healthy indoor climate. It is suitable for both new builds and renovations, performing exceptionally well in pitched roofs, timber frame walls, ceilings and internal partitions.

CHARCTERISTICS

• Excellent thermal performance: Declared thermal conductivity of 0.036 W/m·K for strong winter insulation and summer heat protection.
• Flexible and robust: Adapts to surrounding components and friction‑fits securely without sagging.
• Breathable (vapour‑open): Helps maintain a healthy indoor environment and reduces moisture risks.
• Acoustic benefits: Dense fibre structure provides effective sound absorption.
• Sustainably sourced: PEFC‑certified wood from responsibly managed forests.
• Environmentally friendly: Manufactured with minimum 80% bio‑based content and fully recyclable.
• Non‑irritant: Comfortable to handle during installation.
• Fire classification: Class E according to EN 13501‑1.

APPLICATION

• Timber frame external walls
  
• Internal partitions
• Ceilings and service zones
• Cavity insulation in renovation projects
• Pitched roof insulation
• Eco‑builds and low‑energy homes

CERTIFICATIONS