Welding
Coded welders qualified to BS EN ISO 9606 across MIG, TIG, MMA, and flux-cored - workshop and on-site, with WPS documentation for critical applications.
What we deliver.
BS EN 1090 Execution Class 2 is the fabrication standard we works to. BS EN ISO 9606 is the approval standard every individual welder on our floor is tested against. Both matter, and both appear in the documentation your project gets at handover - because a company certification without individually-qualified welders is a paperwork record that does not survive a real QA audit.
Processes span MIG, TIG, MMA, and flux-cored arc welding across mild steel, stainless, and aluminium. We prefabricate by default in our Rotherham workshop and issue full RAMS, hot-work permits, and fire watches when site welding is the right answer - typically on retrofit steelwork into existing structures, out-of-position welds that cannot be shop-completed, or heavy sections in weather flux-cored handles better than shielded MIG.
What we make.
Every project follows the same certified workflow - so you get the same outcome whether we're making one beam or a thousand.
Four-process welding range
MIG, TIG, MMA, and flux-cored arc welding across mild steel, stainless, and aluminium. Flux-cored matters on heavier-section structural work and on-site welding in weather conditions where shielded MIG gas dispersal struggles - self-shielded variants work outdoors where MIG alone does not.
Individual welder approval - BS EN ISO 9606
Every welder is individually approval-tested to BS EN ISO 9606, the person-level standard that sits alongside our company-level BS EN 1090 Execution Class 2 certification. The distinction matters at PQQ stage: one certifies the factory, the other certifies each person who holds the torch.
Weld procedure specifications for critical applications
For safety-critical applications we issue written Weld Procedure Specifications alongside material traceability certificates and independent NDT testing results. WPS is required under BS EN 1090 Execution Class 2 but not always offered as a client deliverable - we supply it as part of the handover pack.
Site welding with full hot-works discipline
When site welding is unavoidable, full RAMS, hot work permits, and fire watches are standard practice. NDT, where the spec demands it, goes to an independent testing house so the test is independent of the fabricator.
Craftsmanship. Accountability. No shortcuts.
No subcontracted welders. No outsourced site crews. Every project from 3D model to final torque-check is handled by a certified UIS team from our Rotherham facility.
Tour our workshop
Project & sample images.
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Four reasons we stay on your shortlist.
The same four reasons come up whether you're a tier-one contractor, architect or self-builder.
About UIS-
01
Accreditations & compliance
BS EN 1090 Execution Class 2. CHAS Elite, Alcumus SafeContractor, ISO 9001. Every project ships with a full QA pack.
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02
Experience & capabilities
Thirty years in business. Drawing board to torque-check happens in-house - no split accountability.
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03
People & values
CSCS operatives. Coded welders. Chartered draughtsmen. A family firm that treats your project like their own.
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04
Innovation & sustainability
Tekla 3D modelling. Automated welding cells. GRP composite solutions where steel isn't the right answer.
"Having dealt with UIS for over six years, rarely have I come across a more pro-active company with a can-do attitude and a "nothing will beat us" culture. Within all aspects of the industry - Brass Balustrade, Stainless Steel Handrail, Bridges, Secondary Steel or plain and simple Portal Frames - their approach and attitude to delivering the same high quality project is always the same."
Questions clients ask us.
BS EN 1090 Execution Class 2 is the company-level fabrication standard - it certifies our factory's production control, weld quality procedures, and traceability systems. BS EN ISO 9606 is the individual welder-approval standard - it certifies each specific welder's competence on a specific process and material. A compliant project needs both, and both appear on the documentation at handover.
Flux-cored arc welding (FCAW) is used on heavier-section structural work and on-site welding in adverse weather. The self-shielded variant works outdoors where MIG's gas shielding struggles. On interior workshop welds, MIG or TIG usually gives a cleaner finish.
Visual weld inspection is in-house. NDT - ultrasonic, MPI, dye penetrant - is arranged through an independent testing house when the specification requires it. Independence from the fabricator is what procurement teams and certifiers require on safety-critical applications.
Material traceability certificates, BS EN ISO 9606 welder approval records for the individuals on your job, weld procedure specifications for critical applications, visual inspection records, and independent NDT results where applicable. Issued as one handover pack at completion.
Recent project deep-dives.
Reclaimed Structural Steelwork Project London November 2025
Our mild steel workshop has been busy this week fabricating and welding the structural steelwork for a unique project we have on down in Lon...
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Stainless Steel Powder Coated Handrails with LED Lighting December 2025
Another successful project completed and handed over! ✅ 😘 Our client requested ourselves to supply and install the stainless steel p...
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Large Steel Construction and Erection Project London December 2025
We are proud to share that our team has successfully completed and installed another high-quality steelwork package right in the heart of Lo...
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