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  • Writer's pictureAdam Sawyer

Fire Retardant Treatment for Timber Cladding

Updated: Dec 23, 2023


Timber cladding adds a natural and stunning aesthetic to buildings, but it also poses a fire risk if left untreated. To ensure compliance with fire regulations and enhance safety, timber cladding must undergo fire retardant treatment. In this blog post, we'll discuss the fire regulations for external timber cladding, the fire retardant treatment process, and how to obtain a BS EN13501-1 Class B Certification.

What are the fire regulations for external timber cladding?

Fire Regulations for Buildings Below 18 Metres:

Under the Approved Document B (ADB), buildings below 18 metres must use external wall materials with a Euro Class B fire rating. The Euro Class B has replaced the British Standard Class 0 & 1 standards, although they may still be applicable in certain cases.

Fire Regulations for Buildings Over 18 Metres:

For buildings taller than 18 metres, used for residential, institutional, or multi-occupancy purposes, a Euro Class A fire rating is required. Unfortunately, wood cannot achieve this rating, regardless of treatment.

BS EN 13501-1 Euroclass B for Timber and Wood

Can timber cladding be treated with fire retardant?

Yes, timber cladding, which typically has a Euro Class D fire rating, can be upgraded to a Euro Class B rating through fire retardant treatment. This treatment is applicable to both raw, unfinished wood and wood that has been painted or varnished.

The Fire Retardant Treatment Process:

Treating Raw Wood:

To meet Euro Class B standards, fire retardant must be applied at the specified rate per square meter. If any paint or varnish is used afterward, it must also be fire retardant to maintain the fire protection qualities.

Treating Previously Painted or Varnished Wood:

For wood that is already painted or varnished, ensure the surface is clean. Apply an adhesion primer, followed by two coats of fire-retardant clear lacquer or paint. Finally, apply a topcoat of matt, satin, or gloss to complete the process.

Obtaining a BS EN13501-1 Class B Certification:

A BS EN13501-1 Class B Certification is a certificate issued by a third-party certifying body, verifying that a treated timber product meets the fire safety standards set out in the European standard EN 13501-1. The certificate includes information about the treated timber, the Euro Class achieved, the products used for treatment, and instructions for maintaining the fire protection of the product.

Fire Retardant Application Services by Fireproofing:

At Fireproofing, we offer a variety of fire retardant application services using the right products to achieve the best possible finish. We can treat most timber and wood types to meet your requirements. For help or advice, our team is available to provide free assistance. Learn more about our fire retardant application services today.

Get in Touch with Fireproofing

If you need expert advice or professional fire retardant treatment services for your timber cladding, feel free to reach out to our team at Fireproofing. Here's how you can get in touch with us:

  1. Visit our website: Fireproofing Timber Cladding

  2. Call us directly at 07970 522475 to speak with one of our knowledgeable team members.

  3. Complete the "Get Your Quote" form with the necessary details about your project, such as the type of wood, dimensions, and desired treatment.

Our experienced team is ready to help you find the right fire retardant solution for your timber cladding project. We're committed to providing exceptional customer service and ensuring that your timber cladding meets the required fire safety standards.

Don't hesitate to contact us today for more information or to discuss your specific requirements.


About the Author: Adam Sawyer

Adam is an industry expert with over 35 years of experience in textile care and fire retardant treatments. He is the founder of Fireproofing, a company specializing in fire retardant spraying and application services for curtains, fabrics, upholstery, wood, and more. With a strong commitment to customer satisfaction and safety, Adam has built lasting relationships with clients and established a reputation for excellence in the field. To learn more about Adam and Fireproofing, visit About Us & Our Expert.



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