Based in Birmingham, Guardian has been designing, supplying and installing residential & commercial films across the UK for over 15 years. With Chas, Constructionline, Exor, Builder’s Profile & Safecontractor accreditations, Guardian Window Films are approved installers for all of the world’s leading window film manufacturers.

Main Links

Recent Posts


Guardian has been specifying and installing Window Film in Commercial Buildings, Government Buildings, Retail Buildings, Military Establishments, Hospitals, Universities and Schools for over 15 years. We have successfully completed a number of SIGNAL DEFENCE WINDOW FILM PROJECTS in partnership with the leading manufacturers in the field. We have CHAS, CONSTRUCTION LINE, EXOR, BUILDER'S PROFILE and SAFECONTRACTOR accreditation and we are approved dealer/installers for all of the world's major window film manufacturers.

Welcome to Guardian, the leading window film specialists in the UK. As accredited dealer/installers for all of the major window film manufacturers in the world, we have access to the widest range of quality tested and approved products and will help you find the very best solution to your particular need(s).
Nicola Enright, MD


The rapid deployment of wireless radio, cellular and TV masts, and the expanding use of wireless technologies such as 802.11X LANs, PDA’s and cell phones create increased security vulnerabilities for security-minded organisations. Traditional building structures with glass windows do not effectively block RF and IR signal energy from leaving or entering buildings and the windows are the major vulnerability.

Ultimate Signal Defence Window Film Solution

Ultima Signal Defence Window Film provides privacy, voice and data eavesdropping protection, additional security for wireless 802.11 networks and devises, RF sheltering to mitigate electromagnetic interference (EMI), IR blocking for mitigating laser microphone threats, protection for humans from damaging electromagnetic emissions exposure and very high solar energy rejection with ultra violet blocking.

Guardian offers you a full service package including an initial security sweep by our cyber security expert to identify where you are vulnerable to cyber attack. On completion of your Window Film installation, our cyber security expert will conduct a post installation security sweep to demonstrate the effectiveness of your new cyber protection.

Benefits of Signal Defence Window Film

Below you can see the main benefits of Signal Defence Window Film:

  • Allows organisations to operate safely, securely and efficiently by blocking up to 99.9% of RF, IR and UV energy from penetrating through windows.
  • Is optically clear, so that all/part of a building can be protected, without changing the uniform appearance of the building.
  • Mitigates the risk of voice conversations being captured through windows using laser microphones. Operating in the infrared (IR) portion of the spectrum, laser microphones can be used to listen to conversations hundreds of metres away from the targeted facility.

Added Benefits Of Blast Mitigation

Ultima Signal Defence Window Film will not only provide Cyber Security, but will also protect against flying glass in the event of a bomb blast, by holding fragmented glass together.

Frame Retention Systems

Ultima Signal Defence Window Film blast mitigation properties can be further enhanced with our Frame Retention Systems when necessary. Guardian has extensive experience and comprehensive expertise in blast mitigation solutions and will be able to identify the specific package to deliver the total solution to your security threat.

Industry Leading Technology

Ultima Signal Defence Window Film technology is the leader in the industry and has become the defacto standard for the United States of America and other Government Organisations.

‘Green’ Credentials

As the highest energy saving clear solar film in the world, Ultima Signal Defence Window Film has ‘Green’ credentials and will enhance your carbon footprint.

Technical Data For Ultima Signal Defence Film

  • First Level Defence
  • Glazing: Signal Defence full spectrum window protection (RF, IR, Blast, Spall & UV)
  • IR Transmission

RF protection to an average 46dB between test frequency range 30Mhz and 6Ghz – TSCM/Eavesdropping protection, RF sheltering for Equipment and Personnel.

Blast protection to GSA level 3b 6psi with 42psi-mili second impulse (achieved level 3b 12.8psi with 63.8 psi-mili second impulse when wet glazed silicone base anchoring system applied). BS EN 12600 Class 1B1 – Blast.

  • Visible Light Transmitted (VLT) (400 – 780 nm): 53 – 70% – Clear and Non-Reflective
  • Visible Light Reflectance (VLR) (400 – 780 nm): 13%
  • Ultraviolet Transmission (UV) (
  • Infrared Ray Transmission (IR) (940 nm): <1%
  • Shading Coefficient: 0.32 – Solar Control AC Energy Reduction
  • Solar Heat Gain Coefficient: 0.27 – Solar Control AC Energy Reduction
  • Total Solar Energy Reduction (TSER): 70% – Solar Control AC Energy ReductionFor more information about Cyber Security and Ultima Signal Defence Window Film call Freephone 0800 077 8403 or contact us today.

Contact Us

    anti glare window film

    We only ever specify the highest quality commercial window film, tested and approved to British and European Standards.

    • We are accredited dealers and installers for all of the leading window film manufacturers.
    • We have CHASConstruction Line, Exor, Builder’s Profile and Safe Contractor accreditation.
    • If you are after a no obligation quote for your commercial window film installation please give us a call free on 0800 077 8403 or email us here.