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Extrema — Bullet-resistant door

Security becomes absolute. Certified resistance to .357 Magnum rounds, even at close range (ballistic certificate). 5 mm ballistic steel sheet, transmittance 1.29 W/m²K, 33 dB. Standard sizes W 800/850/900 x H 2100; custom up to 1050 x 2450 mm, extra height max 2800.

  • Class 4Burglar resistance class
  • 1,29 W/m²KThermal transmittance
  • 33 dBSound reduction
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01

Ballistic certification

Extrema has been ballistically tested with .357 Magnum jacketed rounds, including at close range. It is not a reinforced security door: it is a protection system designed for high-exposure settings, where risk has to be addressed at the source.

02

5 mm ballistic plate

The 5 mm ballistic plate covers the whole leaf: it dissipates bullet energy, withstands impact and stiffens the door as a whole, which also helps against forced entry.

03

Security without losing comfort

Despite the reinforced structure, Extrema keeps the line’s comfort figures: 1.29 W/m²K thermal transmittance and 33 dB sound reduction, with full-coverage polyurethane insulation.

Extrema — Bullet-resistant door

Data & equipment

Technical sheet

Burglar resistance classClass 4
Thermal transmittance1,29 W/m²K
Sound reduction33 dB
Standard sizes (clear opening)L 800/850/900 – H 2100
Extra height (clear opening)max 2800

Standard equipment

  • Galvanised steel subframe
  • Anti-tear fixed frame
  • Opening leaf in galvanised steel sheet
  • 3 adjustable ultra-high-strength steel hinges
  • Two vertical omega reinforcements
  • Two triple-piston deadbolt extensions
  • Rack lock with VIPER MOTTURA euro cylinder, 5 keys + 2 site keys
  • Fixed knob and bronzed aluminium handle
  • Perimeter rebate seal
  • 180° wide-angle viewer
  • Drop-down draught seal
  • Safety hook
  • Cladding panels (optional)
  • Polyurethane insulation under the double sheet
  • Full-coverage polyurethane insulation
  • Insulated frame rebate
  • Wooden trim kit
  • Panel holder matching the frame
  • Security jamb
  • Bullet-resistant plate across the whole leaf
  • Additional galvanised sheet

Data from the Stirparo 2026 catalogue. Sizes and equipment may vary with the chosen configuration: contact us for a technical check.

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