Mineral wool impact sound insulation (MW-T/DES)
Mineral wool impact sound insulation (MW TSD / DES): Top sound & fire protection under screed
Quiet and safety are key aspects of modern living and working. In floor construction, impact sound insulation under screed plays a decisive role in minimizing the transmission of walking noises and other disturbances to rooms below. If the highest demands are placed on the sound insulation of the ceiling or excellent fire protection is required, impact sound insulation boards made of mineral wool (MW TSD) are often the superior solution. These special insulation boards, which correspond to the DES application type (insulation under screed with sound insulation requirements), offer outstanding acoustic and fire protection properties. As your nationwide specialists for screed and floor structures, we use mineral wool screed insulation specifically where maximum performance is required.
When is mineral wool under screed the best choice?
The use of MW TSD insulation boards under screed is the first choice, especially when:
- Outstanding impact sound insulation is required: Whether in apartment buildings, offices or hotels - mineral wool impact sound insulation reduces walking noise very effectively. It helps to reliably exceed the requirements of DIN 4109 (sound insulation in building construction) and provides noticeably more peace and quiet.
- High fire protection is essential: mineral wool is non-combustible and classified in the highest European building material class A1. This offers maximum passive safety, especially in escape routes or public buildings. Keyword: non-combustible insulation.
- good thermal insulation is required at the same time: Although the focus is on sound and fire protection, MW TSD panels also provide solid thermal insulation for the floor.
MW TSD / DES: The technology behind the performance
The special properties of the mineral wool impact sound insulation board result from its structure:
- Open-pored fiber structure: The interwoven rock or glass wool fibers trap a lot of air (thermal insulation) and effectively absorb sound energy.
- Defined elasticity: The boards are highly compacted, but still elastic enough to have a low dynamic stiffness (s'). This "spring effect" decouples the screed from the bare floor and minimizes the transmission of impact sound.
- Non-combustibility: The mineral origin of the material makes it inherently fire-resistant(building material class A1).
Important properties & planning information for MW TSD
When selecting and planning mineral wool screed insulation, we pay attention to:
- Impact sound reduction index (ΔLw): We select panels with values that reliably achieve your sound insulation goals.
- Dynamic stiffness (s'): A low value is crucial for good sound insulation.
- Compressive strength: Critical point! Mineral wool under screed must also be sufficiently pressure-resistant. It is imperative that special MW TSD boards are used that are approved for absorbing the screed and live loads and have sufficient compressive strength or low compressibility! The correct compressive strength of the mineral wool is crucial.
- Moisture: The material must be installed dry and protected from the screed water by a PE film.
Professional installation for optimum performance
The full sound and thermal insulation performance can only be achieved with the correct design:
- Flat, clean surface.
- Seamless installation of the MW TSD panels, tightly butted. Thermal and sound bridges must be avoided!
- Careful design of the edge insulation strips (made of mineral wool or PE foam) to avoid sound bridges!
- Cover with PE foil as a separating and sliding layer in front of the screed.
Your nationwide expert for screed insulation with mineral wool
Our expertise for your project:
- Specialist knowledge for selecting the appropriate MW TSD board (compressive strength, sound insulation values).
- Precise, sound-bridge-free installation by our trained teams - nationwide.
- System understanding for the entire floor structure with mineral wool screed insulation.
- Reliable execution to the highest quality standards.
Conclusion: MW TSD - The premium solution for sound & fire protection under screed
Mineral wool impact sound insulation boards (MW TSD / DES) are the first choice when the highest demands are placed on the sound insulation of ceilings and/or fire protection. They offer excellent acoustic and fire protection properties, combined with good thermal insulation. The selection of the right product in terms of compressive strength and absolutely professional installation are crucial.
Maximum peace & security? We advise on mineral wool!
Do you place the highest value on sound and fire protection for your screed insulation? Contact us for advice on mineral wool impact sound insulation and a quote for your project anywhere in Germany. We are there for you by phone, email or WhatsApp.
Frequently asked questions (FAQ)
It often offers the highest impact sound improvement values (ΔLw) and is also non-combustible (A1). It is therefore often the best technical solution for very high sound insulation and/or fire protection requirements.
Only special impact sound insulation boards (MW-T) with sufficient, tested compressive strength for the respective screed and live load may be used! Standard mineral wool for roofs or walls is completely unsuitable and would settle.
It should be installed dry. The boards are usually treated to be water-repellent, but are not designed for permanent moisture. A PE film as a separating layer on the insulation is therefore very important to protect it from the screed mixing water.
Yes, MW TSD boards are generally more expensive than EPS-T boards. The higher price is justified by the better sound insulation and, in particular, the excellent fire protection (A1).
Both cement screed (CT) and calcium sulphate screed (CAF/CA) can be laid as a floating screed on suitable, sufficiently pressure-resistant MW-T boards.