50mm Steicoflex 036 375mm Wood Fibre Insulation

50mm STEICOflex 036 wood fibre insulation batts (375mm width) offer a sustainable, high-performance insulation solution made from renewable wood fibres. Designed to deliver excellent thermal efficiency and moisture regulation, they help improve indoor comfort while reducing environmental impact. Fully biodegradable, they provide a responsible, long-lasting choice for modern UK construction.

The wood fibres are sourced from FSC-certified forests, ensuring sustainable forest management. Vapour-open and breathable, these batts support healthy indoor air quality, reduce condensation risk, and are ideal for timber frame and narrow stud constructions, delivering reliable insulation while protecting the building fabric.

Looking for the 575mm Width Version ? Visit Steicoflex 575mm

Key Benefits

• Model: Steico SteicoFlex 036
• Thickness: 50mm
• Board Length: 1190mm
• Board Width: 375mm
• Pack Quantity: 9
• Board Coverage: 0.446m2
• Pack Coverage: 4.01m2
• Weight/piece. [kg]: 1.115kg
• Pack Weight: 10.03kg
• Fire class (RTF) according to EN 13501-1: E
• Declared thermal resistance: [(m² K) / W]: 1.35
• Declared thermal conductivity: 0,036 W/(m K)
• Density: 50 kg/m³
• Water vapour diffusion resistance factor µ: 2
• Specific heat capacity: 2.100 J/(kg K)
• Declared level of airflow resistance: ≥5 (kPa s)/m²
• Material: Wood Fibre
• Product type: Flexible insulation
• Ingredients: Wood fibres, polyolefin fibres, ammonium sulfate

Product Overview

• Width: 375mm - ideal for standard UK stud spacing
• Material: Natural, breathable wood fibres
• Performance: Thermal and acoustic insulation
• Sustainability: Eco-friendly, recyclable and biodegradable
• Installation: Lightweight, flexible and easy to fit

50mm STEICOflex 036 is manufactured from natural wood fibres, offering a sustainable alternative to mineral wool and synthetic insulation. Its breathable structure helps regulate temperature and moisture, contributing to improved indoor air quality and long-term building performance. Ideal for low-energy and eco-conscious construction projects.

High Thermal Performance for Energy-Efficient Buildings

With a thermal conductivity of 0.036 W/mK, 50mm STEICOflex 036 provides excellent insulation against heat loss in winter and overheating in summer. This helps reduce energy consumption, lower heating bills and maintain consistent indoor comfort throughout the year. Perfect for residential and commercial buildings across the UK.

Excellent Acoustic Insulation

50mm STEICOflex 036 375mm delivers outstanding sound absorption, reducing airborne noise and improving acoustic comfort. It is ideal for use in walls, floors and ceilings, making it a popular choice for homes, offices, studios and mixed-use developments where sound control is essential.

Easy, Flexible Installation

Designed for fast and efficient installation, these 50mm flexible insulation batts fit tightly between studs, joists and rafters. The 375mm width suits standard UK timber frames, while the flexible structure allows for easy cutting and installation around services and irregular spaces. Suitable for both professional installers and DIY projects.

Eco-Friendly & Sustainable Insulation Choice

50mm STEICO 036 375mm supports sustainable building practices. The wood fibres are sourced from responsibly managed forests, and the product is fully recyclable and biodegradable. Choosing STEICOflex helps reduce environmental impact while meeting modern UK building standards for sustainability.

Suitable Applications

• Homes: Improve comfort and reduce energy bills
• Commercial buildings: Enhance energy efficiency and acoustics
• Studios & offices: Effective sound insulation
• Renovations: Upgrade existing insulation sustainably
• New builds: Meet modern low-carbon construction standards

Healthier Indoor Environment

Free from harmful chemicals, 375mm STEICO 036 helps create a healthier living and working space. Its moisture-regulating properties reduce the risk of condensation and mould, supporting better indoor air quality and occupant wellbeing.

Why Choose STEICOflex 036?

STEICOflex wood fibre insulation batts combine natural materials, excellent thermal and acoustic performance, and ease of installation. They are an ideal choice for anyone seeking high-performance, eco-friendly insulation in the UK.

Info

Have a browse of our Steico Wood Fibre Insulation products. We supply to the entire UK Mainland. If you’d like to talk through the suitability of some products for your project, or get a quantity discount quotation please call us by phone on 02039519012 / 02038839057, email sales@insulationstoreonline.co.uk or Live Chat - Lowest UK Insulation Prices near me.