When choosing insulation for your home or commercial building, most people focus on R-value and cost. But there is a third factor that could save lives — fire safety. Not all insulation materials behave the same way in a fire, and the difference between combustible and non-combustible insulation can be the difference between a contained incident and a catastrophic loss.
ThermBoard® rigid insulation boards are non-combustible — a critical safety advantage that sets them apart from spray foam, fiberglass, and many other conventional insulation products.
The Problem With Combustible Insulation
Spray foam insulation is one of the most widely used insulation products in North America — but it comes with a serious fire safety limitation. Spray foam is combustible. When exposed to fire, it burns rapidly and produces dense, highly toxic smoke that can be lethal within minutes of ignition.
Because of this, building codes require spray foam insulation to be covered with a thermal barrier — typically 12mm drywall — to slow the spread of fire. This adds cost, complexity, and additional trades to every installation. And if the thermal barrier is ever compromised, the spray foam beneath is exposed and vulnerable.
Fiberglass batt insulation is less combustible than spray foam, but it still contains binders and facing materials that can ignite and contribute to fire spread in certain conditions. Mineral wool performs better — but still does not match the non-combustible performance of ThermBoard® rigid boards.
ThermBoard® — Non-Combustible by Design
ThermBoard® rigid insulation boards are engineered to be non-combustible — meaning they do not ignite, do not contribute to fire spread, and do not produce toxic smoke when exposed to fire. This is not an add-on feature or a coating — it is a fundamental property of the materials used in every ThermBoard® panel.
This means that ThermBoard® can be installed without the additional thermal barrier required for spray foam — saving time, cost, and complexity on every project. It also means that in the event of a fire, ThermBoard® will not accelerate the spread of flames or fill the building with toxic smoke.
Zero Smoke Production
Smoke is responsible for the majority of fire-related fatalities — not the flames themselves. Toxic smoke from burning insulation materials can incapacitate building occupants within minutes, making evacuation impossible and dramatically increasing the risk of fatalities.
ThermBoard® produces zero smoke when exposed to fire — a critical safety advantage in any building application. Whether you are building a family home, a commercial office, or an industrial warehouse, choosing non-combustible insulation is one of the most important safety decisions you can make.
Meeting Fire Safety Codes
Building codes across North America are increasingly recognizing the importance of non-combustible insulation in the building envelope. ThermBoard® meets fire safety requirements without the need for additional thermal barriers or protective coatings — simplifying compliance and reducing project costs.
For commercial and industrial applications where fire safety codes are particularly stringent, ThermBoard® provides a straightforward path to compliance — with no additional trades, no additional materials, and no additional cost.
The Bottom Line
When you choose ThermBoard® rigid insulation, you are not just choosing better R-values and lower energy bills — you are choosing a safer building for everyone inside it. Non-combustible, zero smoke, no thermal barrier required — ThermBoard® delivers fire safety performance that conventional insulation simply cannot match.
Specify ThermBoard® for Your Next Project
Contact our team for free specification support — we will help you select the right ThermBoard® panel for your project and ensure full compliance with local fire safety codes.