National Shielding, Inc.

3010 LBJ Freeway

Suite 1297

Dallas, Texas 75234
Tel    (855) 661-3584

We have more 50 years experience in the RF Shielding Industry and related industries. Check out our parent company, National MRI-Shielding

© 2018 National Shielding, Inc. All Rights Reserved.


Specializing In RF Shielded Enclosures
Design - Build - Service Dallas, Texas - Made In The USA

RF Shielding


National Shielding Inc is dedicated to providing highly effective RFI/EMI shielding solutions that are used for a huge variety of situations and facilities such as secure government facilities, police evidence rooms, SCIFs, computer server rooms, and crime labs


We design, manufacture, install, and certify RFI shielded enclosures.  All our shielding components are fabricated using the highest quality control in order to deliver a secure reliable product.

All our shielded rooms are warrantied to provide the best possible security and shielding effectiveness.




RFI Shielding Excellence


Our steel modular shielded enclosures provide highly effective shielding over a broad range of radio frequencies.  


These secure RFI shielded enclosures, also known as faraday cages, provide extremely high shielding performance using various combinations of steel and other alloys.

The sturdy construction and unique assembly of the solid enclosure systems allow for repeated disassembly and reassembly without loss of shielding effectiveness.

National can provide an RFI shielded enclosure of almost any size, from small prefabricated units to larger custom built installations.

Our Products


RFI EMI Shielded Enclosures

Our shielded rooms include:


  • Solid steel panels to form walls, floor, and ceiling

  • ​RFI Shielded Doors

    • Highly conductive RF shield gaskets specifically designed for  higher frequencies

    • Additional sound reducing gaskets for higher STC ratings

  • ​RFI Shielded Windows (when required)

  • EMI Filters for Electrical Power

  • HVAC Waveguides

  • Fire sprinkler waveguides

  • Data waveguides

  • Telecom waveguides

  • ​Other waveguides as required


Our Services

RF Shield Repairs and Testing

RFI EMI Repairs


National Shielding is a full service RF shielding company. In addition to our RFI shield enclosures, we provide many other shielding services.


  • Existing RFI/EMI shield repairs of RFI leaks or damaged shielding.

  • RFI shield testing to isolate leaks and certify shield integrity.

  • Magnetic Shield Design and installation.

  • EMI/RFI Shield components and supplies, such as shielded doors, shielded windows, EMI filters, waveguides, etc.


From shield repairs to complete RFI shielded enclosures, all our services are delivered with the same attention to detail and commitment to excellence.  We do not outsource our products or services and have strict quality control procedures to ensure all our shielding meets the same high standards.

Limited lifetime warranties are available on all our shield enclosures.


National Shielding provides troubleshooting for RFI leakage and repairs of existing shielded enclosures. 


Door testing, shielded door maintenance, shielded window repairs, and all other RF shield room maintenance and repairs are available by our skilled technicians.

RFI testing and shield certification is another RFI shield service provided by National Shielding. Using the latest RFI testing gear our trained professionals will make sure your RFI shielded enclosure performs at the high level it was designed when originally installed.


Contact Us


National Shielding, Inc.

3010 LBJ Freeway

Suite 1297

Dallas, Texas 75234
Tel    (855) 661-3584



Frequently Asked Questions about
RF Shielding and EMI Shielding

What is RFI and EMI?

Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.

What Causes RF (Radio Frequency Interference)?

Both man-made and natural sources can generate changing electrical currents and voltages that can cause EMI: vehicle ignition systems, cell phones, cell phone towers, lightning storms, and solar flares. Electromagnetic interference can also be caused intentionally by hackers, criminals and terrorists who can produce high level EMIs to commit any number of crimes. 

What is a Faraday Cage, Faraday Shield or Faraday Room?

A Faraday cage or Faraday shield is a conductive enclosure used to block radio frequency electromagnetic radiation. A Faraday cage can reduce or eliminate the coupling of radio waves, electromagnetic fields and electrostatic fields. 

Who Needs/RFI EMI Shield Protection?
  • General Contractors

  • Construction Companies

  • Department of Defense

  • Defense Contractors

  • Large Corporations needing secure rooms

RFI EMI Shielded Rooms are used to protect sensitive data and prevent illegal or accidental eavesdropping of conversations and information. Secure rooms and enclosures are a vital part of corporate security in today's world. 

Why do you need RFI/EMI Protection?
  • To prevent surveillance of data and communications

  • To protect data from digital espionage and data loss

  • To provide protected areas where conversations cannot be overheard

  • To prevent radio frequency interference from entering a room

  • To protect sensitive electronic equipment

RF Shield Enclosure