Fire-Resistant Acoustic Panels: How to Specify Them for Hotels, Car Parks and Offices
Fire-resistant acoustic panels are wall and ceiling panels that absorb or block sound while also resisting fire. In this Short, Sagist Group introduces WELTISO, a composite acoustic and fire barrier panel made in Istanbul, and walks through its material concept, layered construction and typical applications.
This article expands on the video for specifiers, architects and fit-out managers. It explains how this type of panel works, which questions to settle before choosing one, and where it fits in hotels, underground car parks and offices.
Key takeaways
Sagist Group published this video on its YouTube channel on 6 November 2026.
WELTISO is a Sagist Group brand, made in Türkiye and produced in Istanbul.
It is a two-layer sandwich panel: one stone wool layer and one wood wool layer, bonded with a special-formula non-flammable adhesive.
Both layers are non-flammable and both provide acoustic insulation, so the panel protects against fire and noise from either side.
Typical uses include underground parking garages, hotels, commercial developments and corporate facilities.
What the video shows
The Short introduces WELTISO, officially named the WELTISO Composite Acoustic and Fire Barrier Panel, as an architectural composite panel manufactured in Türkiye by Sagist Group. A presenter sits outdoors on a wooden bench under autumn trees while the WELTISO logo and the line "Composite Acoustic and Fire Barrier Panel" appear on screen. On-screen text also mentions an office in Switzerland.
The narration covers the material concept, the layered construction and the application sectors: underground parking garages, hotels and hospitality buildings, commercial developments, corporate facilities, and architectural wall and ceiling systems. It also lists the design considerations behind panel selection: acoustic absorption and sound management, fire performance requirements, thermal insulation, architectural integration and project-specific panel selection.
What is a fire-resistant acoustic panel?
It is a building panel that does two jobs at once: it controls sound inside or between spaces, and it uses materials that do not feed a fire. The two goals are often handled by separate products, so a combined panel can simplify a wall or ceiling build-up.
WELTISO is built as a two-layer sandwich. One layer is stone wool and the other is wood wool, bonded with a special-formula non-flammable adhesive. It is not a three-layer or core panel. Both layers are non-flammable and both contribute acoustic insulation, which is why the panel protects against fire and noise from either side. That matters in ceilings and partition walls where you cannot always be sure which face will be exposed.
Sagist Group states that WELTISO holds CE and EAC certificates and an SGS report. You can read the product details at the WELTISO reference site.
How do you specify a fire-rated acoustic panel?
Start with the fire requirement, then the acoustic brief, then the physical build-up. In Europe, reaction to fire is classified under EN 13501-1, with Euroclass letters running from A1, the highest, for non-combustible products, down to F. Smoke is rated s1 to s3 and flaming droplets d0 to d2, according to a summary of the standard from Measurlabs. Always ask the manufacturer for the test report that matches the exact panel and thickness you intend to install.
The video points to the same logic in its list of design considerations. A practical order of work looks like this:
Fire performance: confirm the class and report your local authority or fire engineer requires.
Acoustic absorption and sound management: define whether you need to reduce reverberation, block transmission, or both.
Thermal insulation: check whether the panel's insulating role helps the wall or ceiling build-up.
Architectural integration: plan joints, fixings, finishes and services penetrations early.
Project-specific selection: match thickness and finish to the room, not to a catalogue default.
Where do these panels work best: hotels, car parks and offices?
They suit spaces where noise and fire risk meet. Underground parking garages are the clearest case, because they are enclosed, echo-prone and carry strict fire expectations. The video names car parks first among its application sectors.
In hotels and hospitality buildings, panels in corridors, plant-adjacent rooms, back-of-house areas and ceilings help keep sound from travelling between guest areas. If you are planning a hospitality fit-out, the team behind Sagist Group hotel furniture and fit-out can coordinate joinery and interior finishes around these wall and ceiling systems. In commercial developments and corporate offices, the same panel can sit behind or within architectural wall and ceiling systems where open-plan acoustics and fire strategy both need attention.
As with any product, final suitability depends on the project's fire strategy, acoustic targets and local rules. Treat the video as an introduction, then request project-specific data from the manufacturer through weltiso.com.
Frequently asked questions
What is WELTISO?
WELTISO, officially the WELTISO Composite Acoustic and Fire Barrier Panel, is a Sagist Group brand made in Türkiye and produced in Istanbul. It is a two-layer sandwich panel with one stone wool layer and one wood wool layer, bonded with a special-formula non-flammable adhesive.
Is WELTISO a three-layer or core panel?
No. WELTISO has two layers: stone wool and wood wool, joined with a non-flammable adhesive. Both layers are non-flammable and both provide acoustic insulation, so the panel protects against fire and noise from either side.
Which certificates does WELTISO hold?
Sagist Group states that WELTISO holds CE and EAC certificates and an SGS report. These statements apply to WELTISO only. For project use, ask for the documents that match your exact panel and request, and see the product site at https://www.weltiso.com.
Where are fire-resistant acoustic panels used?
The video lists underground parking garages, hotels and hospitality buildings, commercial developments, corporate facilities, and architectural wall and ceiling systems. They are chosen where sound control, fire performance and thermal insulation all matter in the same wall or ceiling.
Where can I watch the full video?
You can watch the full Short, "Fire-Resistant Acoustic Panels Explained | WELTISO by SAGIST GROUP", on the Sagist Group YouTube channel at https://youtu.be/4E3MqXDfJx4.
Planning a project that needs fire and acoustic control?
Explore the product at weltiso.com, or talk to the Sagist Group team about hospitality fit-out and furniture. To discuss your requirements, contact Sagist Group.
Watch the full video on YouTube (@sagistgroup) and subscribe to the Sagist Group channel.
Written by: Elif Naz Sürücü (Architect & Space Designer) · Reviewed by: Metin Durmaz (Architect & CEO)
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