Intumescent Coatings for Structural Steel
Midsummer supports structural steel packages requiring intumescent coating, helping project teams review drawings, steel schedules, fire rating requirements and coating routes before work reaches a critical site stage.
Protecting steel performance during fire exposure.
- Structural steel loses strength as temperatures rise.
- Fire protection is specified to help steel maintain performance for the required fire resistance period.
- Intumescent coatings are one route for passive fire protection.
- Requirements depend on section factor, fire rating, coating system and project specification.
What Midsummer needs to assess your steel package.
- General arrangement drawings.
- Steel schedule.
- Section sizes.
- Required fire rating.
- Project specification.
- Coating system preference, if known.
- Site/project location.
- Programme dates.
- Fabrication and delivery sequence.
If you do not have everything yet, send what you have. Midsummer can confirm the gaps.
Coating structural steel before it reaches site.
- Suitability review.
- Preparation and coating environment.
- Coating thickness requirements.
- Handling and delivery considerations.
- Touch-up and damage management considerations.
- QA and records.
More on the off-site coating route.
Suitable for commercial and construction steel packages.
Commercial buildings
Office, retail and mixed-use schemes where the steel frame carries fire-rated requirements.
Industrial units
Warehouses, logistics and light industrial buildings with portal or column-and-beam frames.
Residential with steel
Residential developments where structural steel forms part of the load-bearing frame.
Refurbishment & extension
Steel packages added to existing structures, where programme and access need coordination.
Fabricator-led packages
Direct support for fabricators coordinating coating before despatch to site.
Main contractor schemes
Coating coordinated within the main contractor programme alongside other trades.
Documentation that supports handover, not just installation.
- DFT checks.
- Product/system information.
- Batch references where applicable.
- Photo evidence.
- Project records.
- Handover pack support.
See quality documentation or ask what documentation your project needs.
Issues worth catching before coating begins.
- Missing or unclear fire rating requirements.
- Late steel design changes.
- Unclear coating specification.
- Transport or installation damage risk.
- Connections and site-applied areas.
- Programme mismatch between fabrication, coating and delivery.
Structural steel coating: common questions.
- What fire rating can intumescent coating provide?
- This depends on the steel section, coating system, loading assumptions, specification and project requirements. It should be reviewed project by project.
- Can intumescent coating be applied before steel is installed?
- Yes, where the steel package is suitable for off-site coating and handling requirements are properly considered.
- Do you need the full fire strategy?
- It helps, but initial review can often begin with drawings, steel schedule, required fire rating and specification details.
- Can Midsummer work with fabricators directly?
- Yes, the route is suitable for fabricator-led enquiries where coating can be coordinated before delivery.