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Steel Security Doors and Fabrication Services in London
Gosport Engineering is a long-established family business renowned for delivering high-quality steel security solutions. Specialising in made-to-measure steel doorsets, including fire doors tested to four-hour standards, we combine precision engineering with decades of hands-on expertise. Our in-house team manages every stage from design and fabrication to installation, serving major corporations, local authorities, and NHS Trusts.

With a commitment to durability and security, our products undergo rigorous quality checks and are finished with corrosion-resistant coatings for longevity. Clients benefit from tailored consultations to create bespoke security features, available as supply-only or fully installed solutions across the UK.
Services
Steel Doors Fire Doors Window Protection Boundary Protection Steel Stairs
Highlights and features
  • We are a long-established family business with a reputation for quality steel fabrication.
  • Our products undergo rigorous quality checks at every manufacturing stage.
  • We offer made-to-measure solutions tailored to client specifications and site requirements.
  • Our in-house team handles design, fabrication, and installation for seamless project delivery.
  • We serve major corporations, local authorities, and NHS Trusts with proven reliability.
Services
Steel Security Doors
Our made-to-measure steel security doors are engineered for maximum strength and durability. Each door is handcrafted to exact specifications, featuring zinc phosphate pre-treatment and powder coating for corrosion resistance. Available in standard RAL colours, they can be installed by our team or supplied as DIY kits.
Fire Doors
Fire doors tested to withstand up to four hours of exposure, ensuring compliance with safety regulations. Custom-fitted without spacers, they maximise doorway efficiency while maintaining aesthetic flexibility through powder-coated finishes and colour options.
Window Protection
Anti-vandal window protection systems crafted from high-grade materials. These made-to-measure solutions include louvred grilles, window defenders, and lattice bars, all powder-coated for longevity and available in a full RAL colour range.
Boundary Protection
Custom boundary security solutions including gates, railings, and fencing. Designed to client specifications or site surveys, these products use premium materials and finishes such as galvanisation or powder coating for lasting performance.
Steel Staircases
Bespoke steel staircases fabricated to precise architectural requirements. Our in-house engineers ensure structural integrity and compliance with safety standards, with finishes tailored to match building aesthetics.
Questions
What types of steel doors do you manufacture?
We produce standard duty, heavy duty, fire-rated, louvred, and glazed steel doors, all made to measure for precise fit and security.
Do you offer installation services?
Yes, we provide full installation by our experienced engineers within southeast England, with supply-only options available nationwide.
Are your products customizable?
All products are made to measure using client-supplied dimensions or site surveys, with custom finishes and RAL colour options.
What sectors do you serve?
We work with utilities, construction firms, petrol retailers, local authorities, housing associations, and NHS Trusts.