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Fire Door Protection Cold Smoke Seals: A Comprehensive Guide to Improve Fire Safety and Energy Efficiency

Cold Smoke Seals Fire Door

Understanding the Importance of Cold Smoke Seals

When it comes to fire safety and energy efficiency, cold smoke seals play a crucial role in maintaining a secure and well-insulated environment. Most people are familiar with the concept of fire barriers and smoke barriers, but many may not be aware of the importance of cold smoke seals in preventing the spread of smoke in the event of a fire. In this comprehensive guide, we’ll explore the role of cold smoke seals, how they work, and their significance in fire safety and energy efficiency for both residential and commercial properties. Whether you’re a homeowner looking to enhance your family’s safety or a business owner striving for a more energy-efficient building, this article will provide you with the insights you need.

What Are Cold Smoke Seals?

Cold smoke seals are specialized sealing solutions that play a crucial role in preventing the spread of smoke within a building. These seals are typically installed in the gaps around doors and windows, as well as in any other openings in a building’s fire barrier system. Cold smoke seals are designed to expand when exposed to heat, creating a tight seal that effectively prevents smoke from passing through.

These seals are essential components of fire-rated doors and windows. Their primary function is to inhibit the passage of cold smoke during a fire incident. While fire-rated doors are effective in stopping the spread of flames, they may not be entirely airtight. This is where cold smoke seals come into play, creating a barrier against the passage of smoke, which is often the primary cause of fatalities in a fire.

How Do Cold Smoke Seals Work?

Cold smoke seals work by creating a tight seal around the perimeter of doors and windows. When a fire occurs, smoke is generated due to combustion, and it seeks the path of least resistance to escape. If there are gaps around doors and windows, the smoke can infiltrate into other areas, making evacuation more challenging and putting lives at risk. Cold smoke seals are typically made from fire-resistant materials and are installed on the frame of the door or window. When the door is closed, the seal compresses against the door, creating a barrier that effectively prevents smoke from passing through. This extra layer of protection helps maintain a clear and breathable atmosphere in areas where people are evacuating during a fire, buying valuable time for escape.

The Importance Of Smoke Barriers

  1. Enhanced Fire Safety: Cold smoke seals are a crucial aspect of fire safety measures. By preventing smoke from spreading, they minimize the health risks associated with smoke inhalation and allow occupants to evacuate safely.
  1. Energy Efficiency: Beyond their role in fire safety, cold smoke seals also contribute to energy efficiency. By creating a tight seal, they prevent drafts and heat loss, leading to reduced energy consumption and lower utility bills.
  2. Building Code Compliance: Many building codes and regulations require the installation of cold smoke seals in specific applications, such as fire-rated doors. Compliance is not only a legal requirement but also a step towards safeguarding lives and property. Smoke seals on fire doors recently became a legal requirement under the regulatory reform (fire safety) Order 2005. These regulations came into effect due to the recommendations made in the Grenfell Tower Inquiry Phase 1 report. It is now required by law that the person responsible for checking on fire doors is required to ensure that intumescent seals alongside cold smoke seals have been correctly fitted and are free from any damage.
  3. Insurance Benefits: Some insurance providers offer discounts to property owners who take measures to improve fire safety. Installing cold smoke seals may lead to reduced insurance premiums, making it a cost-effective investment.

Types Of Cold Smoke Seals

There are various types of cold smoke seals available, each with its own unique features and benefits. Some common types include intumescent strips, silicone seals, and brush seals. Intumescent strips are made of a material that expands when exposed to heat, creating a seal that is effective in preventing the spread of smoke. Silicone seals are flexible and can be used in a variety of applications, making them a versatile option for cold smoke sealing. Brush seals are made of a combination of metal and brush bristles, providing a durable and effective seal against smoke.

What Is The Difference Between A Cold Smoke Seal And An Intumescent Strip?

Cold smoke seals and intumescent strips are both important components of fire safety systems, but they serve different purposes and work in distinct ways.

Cold Smoke Seals:

  1. Purpose: Cold smoke seals are primarily designed to prevent the passage of cold smoke during a fire incident. Cold smoke, which can be just as deadly as flames, is the leading cause of fatalities in fires. These seals create a barrier to contain smoke, allowing occupants to evacuate safely.
  2. Material: Cold smoke seals are typically made from fire-resistant materials, often rubber or silicone. They expand when exposed to heat to create a tight seal, preventing smoke from infiltrating door or window gaps.
  3. Installation: Cold smoke seals are installed around the perimeter of doors and windows and are integrated into the frame. They compress against the door or window when closed, forming a barrier that stops smoke from passing through.

Intumescent Strips:

  1. Purpose: Intumescent strips serve a broader purpose, as they are designed to provide protection against the spread of both fire and smoke. They are typically installed around the edges of fire doors, and they expand when exposed to heat to create a barrier against both flames and smoke.
  2. Material: Intumescent strips are made of a combination of materials, usually consisting of graphite, or an ammonium-phosphate based material, which expands when heated, and often a protective casing. The expanding intumescent material blocks smoke and fire.
  3. Installation: Intumescent strips are typically installed within the door frame or around the edges of the door. When exposed to high temperatures, the intumescent material swells and fills the gaps, creating a barrier that hinders the passage of both smoke and fire.

The key difference between cold smoke seals and intumescent strips lies in their primary purpose. Cold smoke seals are specifically designed to prevent the passage of smoke and are often used in addition to fire-rated doors, whereas intumescent strips provide protection against both fire and smoke and are commonly used in fire doors and other fire-rated assemblies to create a comprehensive barrier against both threats. The choice between these components depends on the specific fire safety requirements of a building or application.

How To Fit A Cold Smoke Seal?

In order for cold smoke seals to be effective, they must be properly installed. This means ensuring that there are no gaps or openings in the seal and that it is securely attached to the door or window frame. It is also important to regularly inspect and maintain cold smoke seals to ensure they are in good working condition.

  • Cold smoke seals can either be fitted with a surface mounted or a rebated fitted approach. Usually, a fire door already has a groove in the door to allow for a rebated fit. If the door doesn’t have a groove and requires a rebate fit, a rebate cutter can be purchased to create the groove. However, for some applications a groove may not be needed in which a surface fit may be more appropriate. Our range of cold smoke seals come with a self-adhesive strip to make this application a seamless process.
  • Upon fitting ensure the surface is cleaned from dirt/debris, use a measuring tape to ensure the smoke seal is cut to the correct size. Once this is done, make sure that once the seal is fitted it will not prevent the door from opening and closing properly. The industry standard for the gap is that it should never be more than 4mm, except for at the bottom of the door.

Choosing The Right Cold Smoke Seals

When selecting cold smoke seals, it’s essential to consider factors such as fire rating, material, and compatibility with your doors or windows. Firewise supply a range of cold smoke seals from leading brands such as Sealmaster, Lorient, Ventura and Mann Mcgowan. Consult with one of our technical experts here at Firewise to ensure you choose the right product for your specific needs.


Cold smoke seals are more than just an accessory for your doors and windows. They are vital components of fire safety and energy efficiency, offering protection and peace of mind. By understanding their importance and making informed choices, you can create a safer and more energy-efficient environment for your home or business.

Investing in cold smoke seals isn’t just about complying with regulations; it’s about taking proactive steps to protect what matters most – your loved ones and your property. Prioritize fire safety and energy efficiency by exploring the range of cold smoke seals and the benefits they offer.