Fires of London

FuranFlex® Chimney Lining Systems

FuranFlex® is a revolutionary chimney lining system designed to restore, protect, and enhance chimney performance without the need for major structural alterations. Using advanced glass fibre reinforced thermosetting resin, this innovative solution creates a durable, seamless liner suitable for chimneys of any shape, size, or length.

Ideal for older, period, and listed properties, FuranFlex® allows you to bring large open fires back into use without reducing the fireplace opening or installing intrusive mechanical systems such as chimney fans.

How FuranFlex® Works

The FuranFlex® liner is installed in a unique way that ensures a perfect fit within your chimney:

  • The liner is inserted in a soft, flexible state

  • It is then inflated using steam, expanding to match the exact shape of the chimney

  • Heat is applied to cure and harden the material

  • The result is a seamless, airtight, and joint-free composite liner

Once cured, the liner achieves a strength comparable to steel while remaining lightweight and highly adaptable.

Advanced Performance & Durability

FuranFlex® liners are engineered for long-term performance and safety:

  • Highly resistant to heat, flames, and corrosion

  • Suitable for all chimney configurations, including irregular or complex flues

  • Creates an airtight system, improving efficiency and safety

  • Smooth internal surface promotes optimal airflow and combustion

  • Excellent thermal insulation properties

This combination ensures your heating appliance operates safely, efficiently, and economically.

Key Benefits of FuranFlex®

Choosing FuranFlex® offers significant advantages over traditional chimney lining methods:

  • No need to demolish chimney walls

  • Installation typically completed in just a few hours

  • Suitable for all fuel types and appliances

  • Joint-free lining for chimneys up to 100 metres high and 120 cm diameter

  • Adapts to any chimney shape or dimension

  • Long-lasting with a 25-year corrosion-free guarantee

Ideal for Listed & Heritage Buildings

FuranFlex® is particularly well suited for heritage, listed, and conservation properties, where preserving the original structure is essential. Its non-invasive installation means you can upgrade your chimney system while maintaining the building’s character and compliance.

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