Finishes
Materials and finishes
The right finish makes steel last. Here is what we recommend for each kind of work.
| Finish | Best for | What to know |
|---|---|---|
| Shop primer | Internal steel that will be hidden or boxed in | Lowest cost; touch up after installation |
| Paint system | Internal exposed steel, large structural steel, site repairs | Any colour; can be recoated |
| Hot-dip galvanising | External steel, lintels, balcony frames | Long life outdoors; dull grey finish that weathers |
| Powder coating | Stairs, balustrades, gates and railings | Hard, even colour finish in RAL colours |
| Duplex (galvanised + powder coat) | External metalwork you see | Longest life outdoors, with colour |
| Intumescent coating | Exposed steel that needs fire resistance | Thin-film fire protection for a rated period |
| Stainless steel | Handrails, coastal and hygienic settings | No coating needed; higher material cost |
Steel grades
Most structural steel we supply is S355, with S275 where specified. Read S275 vs S355 explained.
More detail
Questions
Frequently asked questions
No. Galvanising, powder coating and intumescent coatings are applied by specialist finishers we work with, and we manage the programme and checks.
Usually hot-dip galvanising, with powder coating on top if you want a colour.
Ready to price your steel?
Send your drawings or describe the job. You'll have a competitive, no-obligation quotation within 48 hours.