Supply, Maintenance & Repairs of Steel Door Sets to businesses across Yorkshire, Lincolnshire & the UK

C&N Door Systems have an unbeatable selection of sizes and options of made to order Steel Security Doors and offer a rapid turnaround.

Looking for Steel Door Sets?

All of our security doors are individually designed and made to order with a rapid turnaround guaranteed. The door hinge areas are reinforced with unique ‘Hinge Chassis Systems’. Furthermore all our steel security doors have a minimum of 7 heavy duty dog bolts. The revolutionary ‘Fast Fit Frame’ options makes our doors quick and easy to install.


Door Frame

  • Manufactured from 1.6mm Zintec Steel
  • Fast Fit Frame supplied with 12 Adjusters and Hex Tool for tightening (standard frame option available)
  • Internal Hinge Chassis System
  • 90mm single rebate profile (150mm option available)
  • Integral mounting plates
  • Prepared for inside and outside fixing
  • P Seals


  • Disability Discrimination Act (DDA) compliant aluminium threshold

Door Leaf

  • Manufactured from 1.2mm Zintec Steel
  • Folded 45mm thick leaf with composite Dufaylite honeycomb core
  • Integral Anti Jemmy Strip to prevent against attack with a crowbar

Security Door Hinges

  • Minimum of 4 high quality stainless steel hinges (BS 1935.2002 grade 13)
    (larger doors have 6 hinges)

Security Door Dog Bolts

  • Minimum of 7 no. 17.5mm solid steel dog bolts (9 on larger doors)


  • Primed as standard or powder coating available in a wide choice of colours


  • Manual, 14pt or electric locking
  • Single or double Euro Profile Cylinders
  • Fire exit hardware
  • Selection of handles, closers and limit stays
  • Louvres or glazing with Georgian Wired Glass, Polycarbonate or Laminate
Old door
Steel Door Set
A completed Steel Door Set installation in Hull