Alexis® Door

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We offer submittal packages for builders as well as professional installation.

Patent-Pending Design.

Flawless Visual Profile with Concealed Hinge Design

Alexis is the latest innovation to come from Noise Barriers. This patent-pending, high performing door design provides exceptional acoustics with unmatched aesthetics. The Alexis door eliminates visibility to exposed hinges allowing for the architectural integrity of the space to go uncompromised.

ALEXIS - [ə-LEHK-sis ] from the Greek noun 1. "Defender"

This 2 minute video gives an overview on the simple installation process for the new Alexis Door.  Alexis arrives on site, completely factory assembled, making installation easy.

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  • Guaranteed acoustic performance.
  • 1-3/4" door thickness designed to work with standard building hardware.
  • All hardware, seals and hinges are factory installed.
  • Pre-Installed threshold.
  • ADA compliant single continuous compression seal, minimal opening force.
  • Lightweight/level swing for ease of opening.
  • Split-frame assembly allows installation into existing openings.
  • All doors with vision panels are delivered factory glazed.
  • All doors are tested at independent NVLAP approved testing facilities.

Optional Features

  • Wood veneer finish available
  • Impact Resistant
  • Offset metal frame, designed to be covered by millwork.


  • Studios
  • Performance Halls
  • Classrooms
  • Jury Rooms
  • Mechanical Equipment Rooms
  • Control Rooms
  • Conference Rooms
  • Secure Areas
  • Auditoriums
  • Quiet Rooms
  • Sensitive Compartmented Information Facilities (SCIF)

Acoustic Performance - Specifications - Drawings

Acoustical Performance Data
Sound Transmission Loss Data, dB

1/3 Octave Band Center
Frequency, Hz
  125     250     500     1K     2K     4K   STC
ALX-51, 1-3/4" Thick   27     45     48     53     53     55   51