IsoDoor HD

View our Product FAQ for answers to common questions about our line of IsoDoors.

Our proprietary and fully sound tested IsoDoor HD (HD LF) is created for walls that require the highest levels of performance within a single operating wood door. The IsoDoor HD is well suited for any wall with an STC rating of 64 or lower. The IsoDoor HD is most commonly used in home theaters, recording studios, and rooms that require exceptionally high isolation for both low frequencies and within the vocal range. Generally in walls with double stud framing or decoupled using GenieClips/HushFrame Rafts or similar.

The standard size for our IsoDoor HD is 36" wide and 80" tall. This is a custom door that can be built in a size anywhere from 24" to 42" wide and 60" to 96" tall. The slab thickness is 2-1/2" with a standard backset of 2-3/4". We do recommend solid stainless steel handles to stand up to the weight of the door and pressure of the door seals, which is why we recommend the purchase of INOX TL4 with our IsoDoor HD/HD LF, available here: https://isohardware.com/products/tl4-series-tubular-lock. The weight of the IsoDoor HD is 340 pounds, about 235 pounds more than a solid core noise cancelling door, and even 110 pounds more than our more standard IsoDoor SD. Each IsoDoor HD arrives pre-hung with a jamb to match your wall depth, up to 8" included in the price (deeper jamb depths available on request). All perimeter seals are included with a fully mortised automatic door bottom, acoustic threshold, and rubber perimeter seal system. The only component not included is the door handle itself.

HD LF Core

The HD LF core increases low frequency performance significantly while sacrificing some performance in the mid to high frequency range. This change in core type is provided at no extra cost. Communicating assemblies are best when each noise cancelling door slab is different. Using an IsoDoor HD and IsoDoor HD LF is a great combination that will easily keep up with the highest performing walls built. 

Our line of IsoDoors are designed and manufactured from start to finish by IsoStore. We offer a full year warranty on workmanship and materials from the date the noise cancelling door is received.

WHO USES OUR DOORS?

We have a large list of clients ranging from recording studios, theater builders, music artists, universities, DIY customers, and many, many, more. A short list of our more recognizable customers can be found below. Rest assured, when you purchase an IsoDoor for your project, you are investing in a door that is trusted by the biggest names in their industry.

Musical Artists: Chainsmokers, Pearl Jam, Marshmello, Twenty One Pilots, Coldplay, Smashing Pumpkins, Dr Dre, YG, Camila Cabello, Quavo Huncho, Post Malone, Snoop Dogg, Jaycen Joshua, Markus "Notch" Persson, Ringo Starr, Jon Bellion, Voice Guy Matt. Recording and Sound Studios: 77 Recording Studios, Fox River Studios, Oak Hollow Recording, 4U Recording Atlanta, 331 Sound Inc, Top Dawg Entertainment, Auricle Studios, Dauphin Street Sound, Pirate Studios, Forge Recording, Gat3 Studio, Hi-Five Studio, Sessions Studios, Reel Foley Sound, Kota NY, Mid South Audio Studio, Rad Lazer, Vision Entertainment. Schools and Universities: School of Rock, University of North Carolina, Stanford University, Seattle Community College, University of Nevada Reno, Grace College, Haverford College, Burr and Burton Academy. Engineers and Designers: Acousti, Professional Audio Design, Crossley Acoustics, Pro Audio LA, Ears Up Sound Design, Omni Studios, Erskine Group, FC Owens, New England Soundproofing, Haverstick Designs. Composers: Jeff Russo (Tonic, TV shows: Snowfall, Star Trek, Fargo), Mike Post (Law & Order), Zach Robinson (Kobra Kai), Michael Stein (Stranger Things). Corporate Customers: HearingLife, Disney Pixar, Blissful Relaxation, CBS Broadcasting, Warner Brothers, Atlantic Records, United States Air Force. DIY Customers Building Home Theaters and Studios: Hundreds, upon hundreds and growing every week!

Installation of our doors require at least two people. The steps involved with installing a sound door are very similar to installing a standard door. Careful attention must be paid to the rubber perimeter seals and adjustment of the automatic door bottom to achieve the full STC ratings achieved in our lab testing. Each IsoDoor HD will ship with a full installation guide and receiving instructions.

We would recommend installing the IsoDoor SD or IsoDoor HD doors as interior doors only. If an exterior installation is required, use a quality spar urethane sealer and paint with a quality exterior paint on all 6 sides.

DOOR SEAL DESIGN

Our door seals create dead air space and redundancies allowing for an easy installation with more room for error. Because of this, performance from our lab tests are easily replicable in the field. Other isolation door manufacturers have bulky seals that appear to install easily, but often create major deficincies in the corners and will require adjustment over time.

DOOR HANDLES

We do recommend solid stainless steel handles to stand up to the weight of the door and pressure of the door seals. For this, we recommend INOX brand handles for our IsoDoor HD, SD, and V. These are quality stainless steel handles inside and out. This is important when installed in an opening with heavy doors, especially in our HD models. You can purchase them from us on our site here: isohardware.com/products/tl4-series-tubular-lock.

The IsoDoor HD was sound tested as an operable individual door at the most accurate acoustics lab in the United States using the most recent ASTM standards. The results of the operable individual door tests can be found in the product specs download. We have also completed independent sound tests of communicating assemblies using our IsoDoor HD with our IsoDoor SD and IsoDoor V. The results for some of these tests can be found below. Others are available upon request.

COMPARING PERFORMANCE

Unfortunately, the accuracy and consistency of STC tests varies greatly depending on the lab and the year testing was completed. The majority of testing we have found from competitors is no more recent than the mid-1990′s with some testing back to the 1960's. To make it worse, many of the tests were done in the manufacturer's own facilities in labs that cannot accurately measure the ranges tested.

Because of this, a competitor’s STC claims cannot be compared head to head with our STC results. We tested our line of IsoDoor in 2012 in an acoustic lab known as the most accurate lab in the United States. Our ratings may appear lower than some of the highest ratings you will find, but we are confident that our STC numbers will meet or exceed the competition and can be duplicated both in the lab and in the field.

To compare our doors with other manufacturers, we would suggest using simply the weight of a door per square foot and overall thickness of the door. Our IsoDoor HD weighs 17 pounds per square feet, is 2-1/12" thick, and has no resonance issues (referring to the STC contour line in the test). Compare this information alone and you will have a more accurate understanding of how their door compares to ours.

COMMUNICATING DOORS

We suggest creating a communicating door assembly to increase isolation significantly beyond the IsoDoor HD. Our tests show STC/OITC ratings with the IsoDoor HD as high as 65/50 which meets or exceeds double stud walls. Combining the IsoDoor S with the IsoDoor HD or combining the IsoDoor HD with the IsoDoor HD LF will help avoid common resonance issues that occur when two similar materials are installed in the same assembly.

*All test results shown in this table were achieved through third party testing from accredited laboratories. The full test is available upon request.

• IsoDoor HD Product Specs
• IsoDoor HD LF Product Specs
• IsoDoor Sell Sheet