Anti-burglary and Bulletproof Windows with Verified Sound Insulation.

The acoustic insulation of construction joinery is one of the key parameters affecting the comfort of building occupancy. To verify the actual properties of our burglar-proof and bullet-resistant structures, we conducted laboratory measurements of acoustic insulation according to PN-EN ISO 10140-2:2021-10, with this indicator determined according to PN-EN ISO 717-1:2021-06.

Acoustic insulation measurements for security windows

are conducted in specialized reverberation chambers. The source and receiving chambers are separated by a structure containing a test aperture, into which the windows under test are successively installed. The chambers are acoustically isolated from one another and from the foundation upon which they rest. The test wall is constructed of concrete blocks, and the window to be tested is installed in the prepared opening in a manner that precisely replicates the standard installation of burglar-resistant and bullet-resistant glazing units. Once the window frame is anchored, the joint between the frame and the test wall is meticulously sealed with mineral wool and subsequently covered on both sides with a plaster finish. The acoustic insulation test itself is performed using a dual-channel sound analyzer and measurement microphones positioned within the reverberation chambers, with sound generated by specialized omnidirectional loudspeakers. All components of the sound insulation testing equipment are certified and acoustically calibrated. Based on the measurements taken in the reverberation chambers, acoustic insulation ratings (Rw) are calculated in accordance with the PN-EN ISO 717-1:2021-06 standard and confirmed via a test report.

Acoustic insulation test results — Rw index for RC and FB windows

RC4 burglar-proof windows: Rw (C; Ctr) = 42 (-2; -3) dB
RC4 FB4 burglar- and bullet-resistant windows: Rw (C; Ctr) = 40 (-1; -3) dB
FB6 bullet-resistant windows: Rw (C; Ctr) = 41 (-0; -2) dB
The Rw index represents a single-number value for airborne sound insulation. The supplementary values C and Ctr allow for the influence of the noise source's characteristics—including noise with different frequency profiles—to be taken into account.

Factors determining the acoustic insulation of burglar-resistant and bulletproof windows:

Windows designed to resist break-ins and gunfire feature a robust construction that also delivers excellent acoustic insulation. The robust construction, the profiles used, the glazing units, and the effective sealing system all contribute to the window's high level of acoustic insulation.
Multi-chamber aluminum profiles with additional reinforcements limit vibration transfer. Burglar-resistant and bulletproof glazing units—featuring an asymmetric pane arrangement bonded with PVB interlayers and securely integrated into the window profiles—create an outstanding sound-dampening system. Comprehensive perimeter sealing, the use of acoustic gaskets, and multi-point burglar-resistant hardware ensure uniform sash compression around the entire perimeter, eliminating the gaps through which noise most easily penetrates.

Security and acoustic insulation in a single structure.

Combining burglary resistance and bullet resistance classes with a verified Rw rating is essential wherever project specifications mandate protection against break-ins and firearm attacks, alongside the provision of acoustic comfort. Windows featuring this combination of documented parameters are ideally suited for military facilities, banks, diplomatic missions, public administration buildings, and courthouses located in high-noise areas.

Full range of classes and glazing options: RC3 FB4 burglary- and bullet-resistant windows, and RC4 aluminum windows.
Testing methods and regulatory requirements: Acoustic insulation of windows and doors.