Class 4 Security Doors

A extremely high level of protection for homes and offices. Our class 4 security doors have been rigerously tested to ENV1627 Class 4 standards.


  • 18 Locking Bolts
  • Patented Diagonal Bolts System
  • Triple Armoured
  • 1.5mm Steel outer fortification
  • 1.5mm Steel internal fortification
  • 10 horizontal fortification ribs
  • 2 vertical fortification ribs
  • Drill resistant manganese-plate lock fortification


Choose from any of our thousands of standard and bespoke designs.

"We are really very impressed with the build and finish quality and especially appreciate that it looks just like a normal door."
B. Rout (SE3, London)

Class 4 Security Door Testing

30 Minutes Sustained Attack - 10 Minutes per test

  • Claw hammers*
  • 350mm Bolt Cutters*
  • Hand Drills*
  • Junior Hacksaw*
  • 400mm Screwdrivers*
  • Lockpicking Tools*
  • Locksmiths Hammer*
  • ...
    • 700mm Crow Bar*
    • 1.2kg Hammer*
    • 1.5kg Axe*
    • Blow Torch*
    • Bolster Chisel*
    • 750kg Scissor Jack*
    • Plate shears*
    • 500mm Bolt Cutters*
    • Disk Grinder (12vdc)*
    • Electric Drill*
    • Jig Saw*
    • 850mm Felling Axe*
    • 760mm Halligan Bar*
    • 750mm Sledge Hammer*
    *Not all tools listed are used during the ENV1627 test and may instead have been used to test components of door, such as cylinder defenders, or tests conducted during research and development by Portanova. For tools used during a specific test standard please review that standard in detail.
    Portanova Security Doors Quote Number
    Portanova Security Door Certifications