intumescent strip, check these out | What is an intumescent strip?

What is an intumescent strip?

Intumescent Strips, or fire door strips, are fitted to the door and, when exposed to extreme heat, expand to close any edges or gaps that may leave the fire door vulnerable to fire and smoke spread.

How do intumescent strips work?

An intumescent strip is chemically designed to expand when exposed to extreme heat. Once a fire breaks out in a room, the heat causes the strip to expand and seal the gap around the frame to contain the fire. This gives you enough time to escape and call your nearest fire brigade for help.

Does a fire door need intumescent strips?

It is generally accepted that to provide the required level of fire resistance, all fire doors should be reinforced with either intumescent strips, cold smoke seals or a combination of both.

Where do you put intumescent strips?

Intumescent strips are generally fitted into the door frame but are sometimes into grooves in the door itself. If you don’t have grooves in your fire door or frame, you can use a router to make a groove suitable for the intumescent strip.

What are cold smoke seals?

Stopping smoke: What is a cold smoke seal? A smoke seal is a brush that goes around a door, or a door frame, to prevent smoke from passing through the gaps. The smoke seal is an integral part of preventing toxic smoke from passing into the areas of the building which are not on fire.

What is the difference between cold smoke seals and intumescent strips?

What is the difference between a cold smoke seal and an intumescent strip? An intumescent strip expands when exposed to extreme heat, helping seal off gaps in between doors and door frames, to prevent the spread of fire. Smoke seals block smoke, and do not provide any protection against fire.

What doors need smoke seals?

The types of smoke doors I identified are:
Doors required to provide an effective barrier to limit the transfer of smoke.Doors in smoke partitions.Doors in smoke barriers.Fire door assemblies in corridors and smoke barriers.Doors in exit enclosures and exit passageways.

What are intumescent strips made of?

An intumescent material is a substance that does not burn immediately on exposure to heat but usually expands in volume while decreases in density. Intumescent seals can be made from a wide range of synthetic polymers and resin binders such as silicone or epoxy.

What is the difference between a fire door and a smoke door?

Fire-rated doors help slow or prevent the spread of both fire and smoke, but they are not designed to be completely fireproof. A smoke door and a smoke curtain are made to stop smoke from spreading into fire escape routes, providing occupants with a clear, non-toxic route to exit the building.

Where do you put intumescent strips on a fire door?

Intumescent strips are found in the door itself or the door frame, when they are activated through heat, the materials swell to create a seal, in instance of a fire door, it creates a seal to fill the gap in between the door and the door frame.

Can you cut intumescent strips?

Intumescent strips can stop the spread of fire and smoke for up to an hour, but they should be regularly inspected to ensure there are no tears or damage. The intumescent strip will need to be cut to length, and most will have self-adhesive backing strip to stick easily into the groove.

Can you paint over intumescent strips?

You can only over paint an intumescent strip which is designed for fire protection. You must not over paint a smoke seal. Also, be careful to ensure that the strip isn’t damaged by the painter’s preparations.

What size intumescent strip do I need?

Intumescent strip is manufactured in various widths and usually comes with a self-adhesive backing, which readily attaches to common frame and door materials. Typically, you would use 10mm or 15mm wide strips for a 30 minute fire door and 20mm wide strip for a 60 minute fire door.

Do FD30 fire doors need intumescent strips?

The minimum rating of a fire door is now predominantly FD30, with intumescent seals being necessary to achieve this rating. This change came about in recognition that very tight edge gaps were necessary to achieve a FD20 fire rating when doors were subjected to fire resistance testing without intumescent strips.

Where do fire strips go?

Intumescent strips are found in the door itself. When they are activated through heat, the materials swell to create a seal. In the instance of a fire door, it creates a seal to fill the gap in between the door and the door frame.

What is an fd30s fire door?

The FD stands for Fire Door, the 30 denotes that the door withstood the blaze for a minimum of 30 minutes whilst the S means that all of our doors have been fitted with a smoke seal.

What are the fire door regulations?

Any new build or home renovation that has three or more floors must have fire doors fitted to every habitable room that leads from a stairwell. This applies to loft conversions where an extra floor has been added to a two-storey home. Any door leading from your home into an integral garage must be a fire door.

Do smoke seals expand?

When exposed to heat, intumescent seals expand to many times their original size, sealing the gap between the door and the frame and aiding containment of the fire.