FREQUENTLY ASKED QUESTIONS

Vermiculite and intumescent are two forms of fire prevention coatings with distinct applications and advantages. In general, vermiculite coatings is a passive steel fire protection coating which protect the steel structure from reaching its critical temperature without any system activation. they are more suitable for circumstances where:

The budget is limited and aesthetic finishing is not a concern. As vermiculite coatings does not require any system activation, thus no expensive formulation is required and are less expensive than intumescent coatings. Being a passive fire protection coating, it tends to require a thicker coat to protect the steel member from reaching its critical temperature.

On the other hand, intumescent coatings is an reactive coating which protect the steel structure by swelling and forming a thick char layer during fire. they are more suitable for circumstances where:

The aesthetic appeal of the steel is significant because intumescent coatings can be painted over in a variety of colours and finishes. Due to the swelling reaction of intumescent coating, they does not require thick application to protect the steel structure. The durability and reliability of the coating are crucial, as intumescent coatings are more resistant to cracking, spalling, and corrosion.

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An insulated fire-rated curtain includes an insulation layer that limits heat transfer from one side to the other.

A non-insulated fire-rated curtain is a comparable system that lacks the insulating layer. It solely (stop flame behind the curtain and prevent it from escaping.)provides fire rating integrity, not insulation. This implies that heat from the fire can still pass through the curtain and affect the opposite side.

The primary distinction between insulated and non-insulated fire-rated curtains is the level of protection they provide against radiant heat. Insulated fire-rated curtains can delay or even prevent the igniting of flammable items which could start another fire and injury to occupants on the opposite side of the curtain, whereas non-insulated fire-rated curtains could only prevent flame.

As a result, insulated fire-rated curtains are better suited for scenarios where the fire danger is high, the fire load is heavy, or the fire compartment is inhabited. Non-insulated fire-rated curtains are better suited to instances where the fire danger is minimal, the fire load is light, or the fire compartment is unoccupied.

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A dry curtain wall firestop (Siderise CWFS) is a passive fire protection system that utilizes pre-compressed mineral wool that fills the gap between the floor slab and the curtain wall. The Siderise CWFS can be fitted without the use of spray sealants. Instead, foil tape is used, which allows for faster and easier application.

A sealant curtain wall firestop works similarly, except instead of a pre-formed material, it uses mineral wool. The sprayed sealant can be water-based or silicone-based, and it can be sprayed onto the mineral wool after installation.

The key difference between dry and sealant curtain wall firestops is the ease of installation and inspection. Dry curtain wall firestops are easier to install and less messy, and the mineral wool is pre-compressed.  The dry system does not require curing. While sealant curtain walls require more labour and time to install. The mineral wool is compressed on site and it can be messy and more wastage because the compression is greater. It also requires curing time.

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