Can Wood Doors Be Fire-Rated? Fire Resistance in Wooden Doors

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Sash Windows Refurbish specializes in providing repair and restoration services for wooden windows and doors in the UK, as well as various types of carpentry. During the process of fulfilling orders, we utilize a range of tools and paints, including saws, sprays, primers, resins, and adhesives. With more than 20 years of experience in carpentry, we have tested and used various brands and types of work tools, making us well-equipped to offer helpful advice on selecting the right tools and paints for your needs. Read more ...

What Is Fire Ratings for Doors

The building safety, the question of whether wood doors can be fire-rated is a crucial consideration. Fire ratings are assigned to doors based on their ability to withstand fire and prevent its spread.

The Basics of Fire Ratings

Before delving into the specifics of wood doors, it’s essential to grasp the basics of fire ratings. Fire ratings are typically expressed in terms of time, indicating the duration for which a door can withstand a fire without compromising its integrity. Common fire ratings include 20, 60, 90, and 120 minutes, each correlating to the door’s ability to resist fire for the specified duration.

Challenges and Solutions for Wooden Doors

Wooden doors, known for their aesthetic appeal and versatility, pose unique challenges when it comes to achieving fire ratings. Wood is a combustible material, and traditional wooden doors may not inherently possess the necessary fire-resistant qualities. However, advancements in technology and construction methods have paved the way for fire-rated wooden doors.

Fire-Rated Wood Doors: How Are They Achieved?

To meet fire rating standards, wood doors undergo a series of treatments and enhancements. These may include the application of fire-resistant coatings, the integration of fire-resistant cores, or the use of specially designed laminates. The goal is to create a barrier that can withstand the heat and flames of a fire, preventing its progression for the designated duration.

Certification and Compliance

For a wood door to be considered fire-rated, it must undergo rigorous testing and receive certification from relevant authorities. Various testing methods assess factors such as the door’s ability to withstand heat, smoke penetration, and structural integrity during a fire. Compliance with local building codes and regulations is crucial to ensure that the fire-rated wood doors meet the necessary safety standards.

Applications and Considerations

While fire-rated wood doors are a viable option for many applications, it’s essential to consider the specific requirements of a given space. Certain environments, such as commercial buildings, residential properties, or industrial facilities, may have distinct needs when it comes to fire-rated doors. Understanding these requirements is key to selecting the right door for a particular setting.

Balancing Aesthetics and Safety

One of the primary concerns when choosing fire-rated doors, especially in residential settings, is balancing safety with aesthetics. Homeowners often desire doors that complement the overall design of their homes while still providing the necessary protection in the event of a fire.

Fortunately, manufacturers offer a range of fire-rated wood doors with various finishes and designs, allowing for a harmonious blend of style and safety.

The Viability of Fire-Rated Wood Doors

In conclusion, the question of whether wood doors can be fire-rated is met with an affirmative answer. Through technological advancements and careful construction methods, manufacturers have successfully developed fire-rated wood doors that meet stringent safety standards.

When choosing a fire-rated door, it's crucial to consider the specific needs of the space, ensuring a balance between aesthetics and the paramount importance of fire safety.


How to increase the fire resistance of existing timber doors?

To increase the fire resistance of existing timber doors, consider applying intumescent paint or varnish, installing fire-resistant seals, and ensuring proper maintenance. These measures help delay the spread of flames and smoke during a fire.

How can you tell if a wood door is fire-rated?

You can determine if a wood door is fire-rated by checking for a certification label or stamp provided by a testing agency. Look for markings indicating compliance with relevant fire safety standards, such as those from organizations like Underwriters Laboratories (UL) or the British Woodworking Federation (BWF) in the UK.

Can wood door frames be fire-rated?

Yes, wood door frames can be fire-rated by using fire-resistant materials or adding fire-rated coatings. This helps maintain the overall fire resistance of the door assembly, including both the door leaf and its frame.

What are wooden doors UL?

Wooden doors with a UL (Underwriters Laboratories) certification have undergone testing and meet specific safety and performance standards set by UL. UL is a globally recognized safety certification organization, and its certification ensures that the wooden doors comply with industry regulations and provide a certain level of safety and reliability. It’s a mark of quality and adherence to established standards in the manufacturing and installation of wooden doors.

About the author

Glen Ramsey, who presently holds the positions of customer support and content manager, is a cherished member of the Sash Window Refurbish team. He is in a unique position to provide advice on all questions pertaining to the renovation of historic windows because he has a wealth of experience in all elements of window renovation, dealing with clients regularly and assisting them in choosing the best window-related course of action. He oversees the creation of information for all of our platforms in his capacity as content manager, including web content and other materials. Glen has witnessed the whole gamut of Sash Window Refurbish's window restoration activities, from our work on significant listed Georgian homes to a wide variety of smaller-scale private residential projects.


My technician Andrew replaced all my sash windows that had rotten sills. Accessing the rotten sills was not an easy task. He explained to me what needed to be done in order to fix the problem. He is a great person and I’m happy that he was the one who did the job. He is reliable, tidy, friendly and very professional. I highly recommend him.



I hired Andrew and Alex a while back to repair my damaged sash windows. They were was very considerate and very patient as he did his job. A few days ago, I had another problem with one of my sash lock keys and I called him again to come and fix the problem. I’m very impressed that Liam responded quickly and he not only fixed the problem but he also gave me a spare key. What a great after sales service!

Alan W.


I’m very impressed with the new windows that Andrew installed and also the reconditioning job that he did on other sash windows. The quality of his work is by far more superior than what we got when we hired another company a few years back. We will certainly hire him again if any window work arises

Kelly (Sleaford)


Our decorator referred us to Andrew because some of the work needed a window expert. Andrew together with our decorator did a fantastic job. The work was done efficiently and to the highest standards. Andrew is understanding, committed and very professional. I recommend him without any hesitation.

Steaven Reader


Alex did a great job in fixing windows in our terraced house. The windows were broken, frames damaged and the wood was also rotten. Alex's job was high quality and he did it pretty fast. I was also very impressed that he was considerate of my son’s asthma condition and maintained cleanliness. Top work.



Andrew just recently replaced three sash windows in my Edwardian house. He also repaired and replaced some sills and draught proofed three windows. In addition to that, he also did some carpentry work. What I like the most about Liam is that he did a clean job. He is very professional and always updated me about the timescales and costs. He also did his job with minimal disruptions. I highly recommend him.

Cris M.