The three GMiSU exterior roof products provide acoustic insulation of 28-32 dB and reduce rain-impact noise by at least 15-20 dB under the confirmed test conditions. Final perceived sound also depends on the complete roof assembly and interior space.
Confirmed acoustic figures
- Acoustic insulation
- 28-32 dB
- Rain-impact noise reduction
- At least 15-20 dB
- Products covered
- 365 mm modular, 45 mm large-format and 65 mm large-format exterior roof panels
Why the polyurethane core makes a difference
Single-skin metal roofing can transmit impact vibration directly into the space below. In an insulated composite panel, the polyurethane layer separates the two aluminum skins and acts as a damping layer, reducing the energy transferred through the roof.
The bonded composite construction also adds stiffness and limits panel vibration. This is particularly useful for villas, sunrooms, resorts, workshops and other buildings where heavy rain noise can disrupt occupants or operations.
Factors that influence the finished acoustic result
- Panel thickness and profile geometry
- Joint engagement and concealed fixing quality
- Flashings, penetrations and gaps around the roof perimeter
- Supporting structure, ceiling layers and interior finishes
- Rain intensity and the size and use of the interior space
Confirm the right panel and specification with GMiSU.
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