Performance
Sound Insulation in Aluminium Windows and Doors
Sound gets through an opening at the glass, the seal and any gap the leaf leaves against the frame. The figures the Adam Alux catalogue prints for sound cover all three: 42 dB sound insulation on the M-24 pivot door, a soundproof fire door model listed at STC 28 to 45 dB, and the insulation the EPDM seals and the insulating glass add across the window lines. Every value on this page is a catalogue figure, and the result for an installed opening follows its own size and build-up.
The figures the catalogue prints
Three sound figures stand out in the catalogue. The M-24 off-axis pivot door carries 42 dB sound insulation, reached through a layered leaf and a multi-layer cut-off of reflected sound. One fire door model is drawn as a single-leaf soundproof door and listed at STC 28 to 45 dB under an ASTM-E90 test. The entrance spreads print sound insulation level 5 for the range as a catalogue rating, alongside the thermal, water, air and wind figures. Each is a rating for the sealed assembly, stated as printed.
The glass does most of the work
The glazing line is where most sound passes, and the range meets it in two ways. The sliding door sashes leave the factory with automotive-grade tempered glass, which the catalogue lists for sound insulation as well as thermal comfort and safety. The window lines take insulating glass, 5 mm-20 A-5 mm standard on the casement range and 5 mm-27 A-5 mm on the 118 flagship, and the double-glazed interior doors are rated for sound and heat in the catalogue. A wider cavity and an extra pane do the work at the glass.
The seals hold the line
A gap at the meeting stile lets as much sound through as the glass lets through the pane. The window lines seal with EPDM foam gaskets, chosen for aging resistance so the seal holds through years of open and close, and the M-24 pivot door carries an automobile-grade seal strip that the catalogue rates for noise reduced by more than 90 per cent. The multi-point lock on the casement lines is part of the answer: it pulls the sash onto the gaskets at the head, the foot and the meeting stile, so the locked position is the sealed one.
How the build adds up
The acoustic figures sit on the same construction as the thermal ones. The closed-chamber sash sections add stiffness and close the cavity behind the glass, the polyamide bridge in the thermal break sections insulates the frame at the same time as it breaks the heat path, and the entrance doors use the layered leaf with the B1 board and honeycomb core. A specification that asks for quiet can therefore carry the thermal and the acoustic target on one section.
Specifying for noise
Send the noise source as you understand it, road traffic, a corridor, plant, the floor position and the opening size, and the glazing build-up and the seal schedule come back in the quotation. The exact configuration is a project decision, because the same series can be quoted at different glass build-ups for different positions. A finished test unit is available on request before a project commits, and the dimensional pack returns with the quotation.
FAQ
Frequently asked
What sound figures does the catalogue print?
42 dB sound insulation on the M-24 pivot door, a soundproof fire door model listed at STC 28 to 45 dB under an ASTM-E90 test, and sound insulation level 5 across the entrance range. All are catalogue ratings for the sealed assembly.
Which glass gives the most insulation?
The insulating glass build-ups: 5 mm-20 A-5 mm standard on the casement lines and 5 mm-27 A-5 mm on the 118. The wider cavity and the extra pane do the work at the glass, and the exact configuration is confirmed per project.
Do the seals matter as much as the glass?
Yes. Sound passes a gap at the meeting stile as easily as it passes the pane. The EPDM foam gaskets seal the sash to the frame, and the multi-point lock pulls the sash onto them, so the locked position is the sealed one.
Is there a sound rated fire door?
One model in the fire range is drawn as a single-leaf soundproof fire door, listed by the catalogue at STC 28 to 45 dB under an ASTM-E90 test. It carries the fire hardware with it.
Can we quote a quiet door for a street-facing room?
Send the noise source, the floor position and the opening size, and the glazing build-up and seal schedule come back in the quotation. A finished test unit is available before a project commits.
Send your opening schedule
Series, glazing and finish come back as one quotation, with the full dimensional pack on PDF and CAD on request.