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  • Writer's pictureAdam Sawyer

BS EN 13501-1 Class B-s1-d0

Updated: Dec 16, 2023

Achieving Compliance for Varnished Wood in Communal Areas


Fire safety is a top priority in residential buildings. For property management companies and building owners, it's essential to ensure that all materials, including wood, comply with fire safety regulations. In this guide, we'll walk you through a case study on how to treat varnished wood in a communal area to achieve the BS EN 13501-1 Class B-S1-D0 standard.

Initial Contact with the Property Management Company

We were contacted by the property management company, Rennie and Partners, to discuss the possibility of treating varnished wood to comply with BS EN 13501-1 Class B-S1-D0. After assessing the type of wood and the total area that needed treatment, we provided them with a quote for the project.

Planning for Optimal Weather Conditions

Due to the treatment's specific temperature and humidity requirements, we advised waiting until spring, when conditions would be more favourable. Ideally, the temperature should be above 10 degrees centigrade, and the humidity should be low, allowing the treatment to dry between coats.

Preparing for Treatment

Fire Retardant Products Lined Up
Fire Retardant Products Lined Up

Once spring arrived, we agreed on a date and time for the treatment. To ensure the best results, we purchased the necessary products, including Adhesion Primer (required for varnished wood), two coats of fire retardant at a coverage of 10m² per litre per coat, and a topcoat.

Site Visit and Treatment Application

Varnished Wood in Communal Area Before Treatment
Varnished Wood in Communal Area Before Treatment

We visited the site in the morning, obtained the keys, and began the treatment process. Despite the temperature being close to the 10-degree minimum, we used a fan heater to ensure proper drying between coats.

Applying Fire Retardant on Varnished Wood
Applying Fire Retardant on Varnished Wood

After completing the treatment and applying the topcoat, we returned the keys that same afternoon.

Documentation and Certification

Satin topcoat still drying
Satin topcoat still drying

We documented the entire process with before, during, and after photos, as well as the treatment cans for certification purposes. In this instance, a satin topcoat was requested for a more modern finish.

Once the invoice was paid, we promptly sent the certificate, which included details about the products used, the treatment date, and maintenance information. This certificate serves as a record of compliance with BS EN 13501-1 Class B-S1-D0.


Fire safety is a crucial aspect of property management, especially in communal areas. This case study demonstrates how to effectively treat varnished wood to meet BS EN 13501-1 Class B-S1-D0 standards. By following this step-by-step guide, property managers and building owners can ensure their buildings comply with fire safety regulations.

Contact Us

We hope you found this case study insightful and informative. If you have any questions or would like to discuss your fireproofing needs, please don't hesitate to get in touch with us. We're here to help you achieve compliance and maintain fire safety in your buildings.

Visit our website for more information on fireproofing wood:

Phone: 07970 522475

We look forward to hearing from you and helping you with your fireproofing needs. Stay safe!


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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