QuietFold® Bi-Fold Acoustical Door

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

The QuietFold bi-fold door is completely factory assembled including the installation of both sets of magnetic seals, all hardware and even glazing if required. The result is a door that leaves the factory truly ready to install.

All of our bi-fold doors are manufactured by noise control door specialists in the United States. Our fixed frame or split-frame system allows for an easy installation for a wide array of site requirements. Our QuietFold doors are in service everywhere from some of the most sophisticated performing arts centers to the most demanding industrial applications, and everywhere in between.

Features

  • Guaranteed acoustic performance
  • All doors are tested at an independent NVLAP approved testing facility
  • All hardware, acoustic seals and hinges are factory installed
  • Door includes custom cam-lift hinge design, eliminating the need for a threshold in many applications
  • Adjustable mortised bottom seal allows the door to adapt to site floor conditions
  • Double magnetic seals at head and jambs, ADA Compression seals available as an option
  • Split frame assembly allows installation into existing openings
  • All doors with vision panels are factory glazed prior to shipment
  • Designed to work with standard building hardware, factory installed if desired
  • Ease of operation conforms to ADA
  • Available in single-leaf, double- leaf and bi-fold designs
  • Wood veneer or powder paint, factory applied, finish available
  • All door and frame components are pre-hung tested as a complete assembly prior to shipment

Applications

  • Radio/TV/Audio Recording Studios
  • Stage and Rehearsal Areas
  • Convention Halls
  • Auditoriums
  • Music Practice Rooms
  • Concert Halls
  • Mechanical Equipment Rooms
  • Conference Rooms
  • Secure Areas
  • Sensitive Compartmented Information Facilities (SCIF)
  • Test Facilities
  • Spray Rooms
  • Quiet Rooms
  • Product Jury Rooms
  • Schools
  • Vibration Test Labs
  • Factory Offices
  • Mechanical Equipment Rooms
  • Machinery Enclosures
  • Control Rooms
  • Test Chambers
  • Shake—Rattle—Roll Rooms
  • Power Generation
  • Gen. Set Rooms
  • Compressor Rooms

Acoustic Performance - Specifications - Drawings

Performance

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. Door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

Acoustical Performance Data
Sound Transmission Loss Data, dB

1/3 Octave Band Center
Frequency, Hz
  125     250     500     1K     2K     4K   STC
STC 45
QS-45 - 2.5" Thick   29     33     41     48     48     50   45
STC 46
QS-46 - 2.5" Thick   36     41     45     51     50     52   46
STC 50
QS-50 - 2.5" Thick   37     42     50     49     51     55   50
STC 51
QS-51 - 2.5" Thick   40     44     48     52     52     55   51
STC 52
QS-52 - 2.5" Thick   40     44     50     53     54     56   52
STC 54
QS-54 - 3.5" Thick   37     47     52     54     55     60   54
STC 56
QS-56 - 3.5" Thick   38     46     55     55     60     63   56

QS-45-SL (STC 45, Single Leaf Door)

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. Door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-45-DL (STC 45, Double Leaf Door)

This door is a double leaf swing door that has solid skins a minimum of 14 gauge. Each door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-46-SL (STC 46, Single Leaf Door)

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. Door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-46-DL (STC 46, Double Leaf Door)

This door is a double leaf swing door that has solid skins a minimum of 14 gauge. Each door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-50-SL (STC 50, Single Leaf Door)

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. Door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-50-DL (STC 50, Double Leaf Door)

This door is a double leaf swing door that has solid skins a minimum of 14 gauge. Each door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-51-SL (STC 51, Single Leaf Door)

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. Door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

Click Icon to Download File


QS-51-DL (STC 51, Double Leaf Door)

This door is a double leaf swing door that has solid skins a minimum of 14 gauge. Each door leaf is 2-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

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QS-54-SL (STC 54, Single Leaf Door)

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. Door leaf is 3-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

Click Icon to Download File


QS-54-DL (STC 54, Double Leaf Door)

This door is a double leaf swing door that has solid skins a minimum of 14 gauge. Each door leaf is 3-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

Click Icon to Download File

QS-56-SL (STC 56, 3.5" Single Leaf Door)

This door is a single leaf swing door that has solid skins a minimum of 14 gauge. The door leaf is 3-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

Click Icon to Download File


QS-56-DL (STC 56, 3.5" Double Leaf Door)

This door is a double leaf swing door that has solid skins a minimum of 14 gauge. Each door leaf is 3-1/2” thick, provided with two cam-type lifting hinges and a double set of magnetic seals. All galvanized construction using “paint ready” galvanneal A-60 steel with internal stiffeners as required. The acoustic fill is non-combustible, sound absorbing fiberglass or mineral wool. Prime painting or factory finish painting is available. Standard or custom glazing is available. Variety of hardware is available.

Click Icon to Download File

Telemundo's contractor, Restorations Unlimited contacted Noise Barriers' local rep, Tony Handley of Hollywood, Florida. to assist with sound stage doors.