National Custom Hollow Metal

Use beautiful Google Web Fonts to individualize your site and add character to your content.

Whether an office building is in the middle of downtown, in the suburbs, or a more secluded location, noise can have adverse effects on employee comfort and health. Traffic noise frequently exceeds 70 adjusted decibels (dBA), which can cause permanent hearing loss, and many workplaces are full of ringing telephones and noisy machinery. Our team at National Custom Hollow Metal understands that employees are more comfortable and productive in a quiet work environment, and we’re ready to manufacture Sound Safe Sound Transmission Control (STC) doors and frames to keep your meeting private and secure!

We’ve been manufacturing stainless steel doors and frames for over four decades, and all of our products are built to order. Sound Safe STC doors feature advanced noise suppression technology and can be custom-built in any size up to 4’0 x 8.’0 STC ratings range from 20 to 60 and measure a door’s noise suppression capabilities. For example, a door with an STC rating of 20 is effective at reducing overall workplace noise, but it’s still possible to hear muffled conversations on the other side of the door. Our Sound Safe single galvanneal doors have a maximum STC rating of 51, and they have the ability to make human voices virtually inaudible.

There are many great uses for STC doors in an office building. If you operate a recording studio or auditorium, you’ll never have to worry about outside noise distracting your audience or spoiling the quality of your recordings. They’re also a great way to enable your employees to work free from unnecessary distractions, and they enable you to discuss confidential information in conference rooms without worrying about eavesdroppers listening in!

Sound Safe STC doors can be configured as single or pair entry as a complete installation-ready assembly, and are subjected to a rigorous multi-point inspection prior to shipping. We offer free Quik Ship service on all NCHM orders and expedited shipping for our distributors with rapidly approaching deadlines. The Difference is Quality at NCHM and you can order with confidence because your satisfaction is always guaranteed!

If you have any questions or would like to receive a quote on STC doors in two hours or less, contact us online or at 800-334-3070. Email us at [email protected]. Email us at [email protected].