Intumescent coatings are thin-film fire protection systems that expand (intumesce) under heat, forming a stable char layer that insulates the substrate. Applied at project-specific dry film thicknesses (DFT), they deliver 30–120 minutes of cellulosic fire resistance to structural steel and selected timber elements.
- Low weight and minimal impact on architectural aesthetics.
- Compatible with approved primers and decorative topcoats.
- Tested to BS 476 and EN 13381; follow manufacturer datasheets for DFT schedules.
Typical ratings delivered: 30, 60, 90 and 120 minutes for cellulosic fire exposure. Required DFT is determined by member size and exposure (section factor Hp/A) per tested tables in manufacturer datasheets referenced to BS 476 / EN 13381 assessments. We produce project-specific DFT schedules to match your structural design and programme constraints.
- Survey & Take-Off: Review drawings, fire strategy and member schedule; confirm substrates and primers.
- Engineering & DFT Schedule: Calculate section factors (Hp/A) and produce coating thickness schedule by element.
- Surface Prep & Priming: Verify compatible primers; prep to manufacturer requirements.
- Application: Airless spray/brush/roller to specified wet film thickness (WFT) with environmental controls.
- Curing & Protection: Monitor RH/temperature, protect during cure, apply intermediate/topcoats as required.
- Handover: Final DFT verification, snag rectification, documentation and certification.
Our ITP governs inspection at each stage. We record WFT during application and DFT after cure using calibrated gauges. Visual standards, adhesion/holiday checks and environmental logs are maintained.
- Calibrated instruments and traceable records.
- Manufacturer technical sign-off where applicable.
- Handover pack: DFT report, ITP records, product batch data, and maintenance guidance.
We achieve smooth architectural finishes with compatible primers and approved topcoats (matt to semi-gloss). Exterior or high-humidity environments may require durable topcoats and maintenance cycles. We verify primer compatibility, colour, and sheen before application and include redecoration guidance in the handover pack.
What information do you need to quote?
Member schedule, required fire resistance (e.g., 60/90/120), drawings, primer details, exposure (internal/external), programme and access constraints.
How do you verify thickness?
We record Wet Film Thickness during application and confirm Dry Film Thickness after full cure with calibrated gauges per our ITP.
Can coatings be applied on-site?
Yes—our mobile teams work with environmental controls and access planning. Off-site application is available for programme certainty.
Which standards do you follow?
Manufacturer datasheets, BS 476 and EN 13381 assessments, and project specifications.
Send us your drawings and member schedule for a fast, accurate proposal. We’ll confirm primers, DFT schedule, programme, and QA deliverables.
- Typical turnaround: 1–3 working days.
- Email: info@renbrofire.co.uk | Tel: 01702 305003
- Or use the enquiry form.