{"id":10,"date":"2026-09-15T00:35:19","date_gmt":"2026-09-15T00:35:19","guid":{"rendered":"https:\/\/division7.ca\/blog\/?p=10"},"modified":"2026-09-15T00:47:04","modified_gmt":"2026-09-15T00:47:04","slug":"cementitious-vs-intumescent-fireproofing-bc","status":"publish","type":"post","link":"https:\/\/division7.ca\/blog\/cementitious-vs-intumescent-fireproofing-bc\/","title":{"rendered":"Cementitious vs Intumescent Fireproofing: Which System Fits Your Project?"},"content":{"rendered":"

<\/p>\n

Choosing the right fireproofing system is not simply a matter of picking the cheapest product or the fastest application. The correct system depends on the building design, the structural assembly, the required fire-resistance rating, the environment, the finish expectations, and the tested system specified for the project.<\/p>\n

Two of the most common options used on structural steel are cementitious fireproofing<\/strong> and intumescent fireproofing<\/strong>. Both can protect steel during a fire, but they work differently and are suited to different applications.<\/p>\n

What is cementitious fireproofing?<\/h2>\n

Cementitious fireproofing is a spray-applied fire-resistive material installed over structural steel, metal deck, and other approved substrates as part of a tested fire-rated assembly. It creates an insulating layer that slows the rate at which the steel heats up during a fire.<\/p>\n

It is commonly used in commercial buildings, industrial facilities, mechanical spaces, parkades, warehouses, and areas where the fireproofing will normally remain concealed or where appearance is not the primary concern.<\/p>\n

One of its main advantages is efficiency. Large areas of structural steel can often be covered quickly, making cementitious fireproofing well suited to projects with significant quantities of beams, columns, joists, or deck.<\/p>\n

What is intumescent fireproofing?<\/h2>\n

Intumescent coatings look more like conventional paint when finished. When exposed to high heat, the coating expands and forms a thick insulating char layer that protects the steel underneath.<\/p>\n

Intumescent systems are frequently selected where structural steel is exposed as part of the architectural design. They can provide a smoother, cleaner appearance than traditional spray-applied fireproofing and may be preferred in offices, lobbies, retail spaces, public buildings, and other visible areas.<\/p>\n

Application usually requires more detailed surface preparation and closer control of coating thickness. Depending on the specified system, primers and compatible topcoats may also be part of the complete assembly.<\/p>\n

Which system is better?<\/h2>\n

Neither system is automatically better. The right choice depends on the project.<\/p>\n

Cementitious fireproofing may be a strong choice when:<\/strong><\/p>\n