Design basis comes first
Intumescent thickness and cementitious build-up are derived from approved system data. Steel geometry, rating and critical temperature matter.
Environment changes the answer
Humidity, chemical exposure, impact, exterior conditions and maintenance access affect primers, topcoats, mesh, durability and repair strategy.
Compare installed systems
Material price alone ignores preparation, access, coats or build-up, cure time, protection, inspection, repair and architectural finish.
What to verify
- Fire rating and design fire
- Steel section factor
- Critical steel temperature
- Existing primer
- Exposure classification
- Finish requirement
- Application access
- Inspection and maintenance route