Structural Steel Installation
Frame erection to 1000 tonnes — columns, beams, bracing and decking, bolted, plumbed and signed off by our own teams.
Frame ErectionUp to 1000TSite Bolting
UK Structural Steel & On-Site Welding
Precision Welding.
Structural Steel.
Nationwide Installation.
Mobile welding, steel fabrication and structural steel installation for main contractors, developers and architects — on site, on programme, anywhere in the UK.
25 Mobile Workshops
40 Skilled Operatives
Nationwide Coverage
Fully Insured
CHAS Accredited Contractor
On-Site WeldingStructural SteelTIG · MIG · MMAArchitectural MetalworkBalustradesBalcony SystemsMobile FabricationNationwide UKOn-Site WeldingStructural SteelTIG · MIG · MMAArchitectural MetalworkBalustradesBalcony SystemsMobile FabricationNationwide UKOn-Site WeldingStructural SteelTIG · MIG · MMAArchitectural MetalworkBalustradesBalcony SystemsMobile FabricationNationwide UK
About Pronto Welding
On-site welding and steel fabrication, under one contractor.
Pronto Welding Ltd is a Luton-based steelwork subcontractor working nationwide in on-site welding, steel fabrication and structural and architectural steel installation.
With 25 mobile workshops and 40 directly employed operatives, we fabricate, weld and install without waiting on hired plant or third-party welders.
Work ranges from erecting steel frames and cutting in beams on live refurbishments to fitting stainless balustrades.
25+
Mobile Workshops
40+
Operatives
UK-Wide
Coverage
What We Do
Welding and steelwork delivered on site.
Eight core capabilities, from structural steel fabrication and frame erection to commercial welding repairs and architectural metalwork — all delivered in-house.
On-Site Welding
Coded TIG, MIG and MMA welding in position, including overhead and vertical work in occupied or exposed conditions.
TIGMIGMMA / Arc
Mobile Welding & Fabrication
A workshop on wheels — brackets fabricated, beams spliced and steelwork altered on site the same day.
Mobile WorkshopRapid Response
Architectural Metalwork
Stainless and mild steel to architect's details, with welds dressed and finished for exposed locations.
StainlessMild SteelBespoke
Glass & Stainless Balustrades
Surveyed, fabricated and installed to Part K loadings — stainless posts through to structural glass channel systems.
GlassStainless
Balcony Systems
Bolt-on and inset balcony frames for residential developments, craned in floor by floor.
BespokeDevelopments
Railings & Security
Galvanised railings, gates, plant screens and grilles made to site dimensions and installed to line and level.
RailingsSecurity
Metal Polishing
Brushed, satin and mirror finishes restored on site, blending new welds into existing metalwork.
PolishingFinishing
Why Pronto
Built for main contractors who can't afford delays.
Steelwork sits on the critical path, where a late welder or missing ticket costs a week. Own fleet, own operatives, own supervision — that is how we remove those failure points.
25 Mobile Welding Workshops
40 Skilled Operatives
Nationwide Coverage
Rapid Mobilisation
Structural Steel Specialists
Fully Insured for Hot Works
Fully Insured for Working at Height
Architectural Metalwork Experts
Health & Safety Focused
Experienced Installation Teams
Our Fleet
25 Fully Equipped
Mobile Workshops.
Every van carries TIG, MIG and MMA plant, cutting and grinding gear, fixings and consumables — so a crew can arrive, take a permit and start the same morning, anywhere in the UK.
Featured Projects
A snapshot of our recent steelwork.
Portal frames, canopies, footbridges, staircases and balustrades, photographed on live sites.
Client Feedback
Trusted by main contractors across the UK.
Independent LinkedIn recommendations and five-star Google reviews from the people we work alongside.
LinkedIn recommendation
“Pronto Welding are a brilliant steelwork subcontractor that have worked with me on a few projects. All of their teams are extremely knowledgeable and have a passion to deliver a high quality project on time, every time.”
Kris J.
KJ Construction Training — NVQ Assessor
Google Reviews
5.0
Jack Brydges
Local Guide · 42 reviews · 7 photos
Bobby Long
Google reviewer
Dmitrijs Matkovskis
5 reviews
Get in Touch
Let's talk.
Send drawings, a schedule of works or just a description of the problem. We reply within one working day with availability, an approach and a price where we can.