Schlüter®-DITRA-SOUND | Function | Schlüter-Systems


Application and Function

Schlüter®-DITRA-SOUND is a bonded impact sound insulation for tile coverings, made of a heavy polyethylene mat, which has an anchoring fleece laminated on both sides to bond with the tile adhesive. This system was tested by an independent testing institute in accordance with the standard DIN EN ISO 140-8 (BS EN ISO 140-8).

As part of a complete assembly, an impact sound insulation improvement (ΔLW) of 13 dB was determined for Schlüter®-DITRA-SOUND.

However, the actual impact sound reduction of an assembly depends on the local circumstances (construction system) and may differ from this value. Consequently, the determined test values cannot be applied to specific construction site situations. The substrate must be level and ready to bear weight. Schlüter®-DITRA-SOUND is installed in adhesive that must be suitable for the substrate. The adhesive is applied with a notched trowel (recommended size 3 x 3 mm or 4 x 4 mm). The underside of Schlüter®-DITRA-SOUND (i.e. the printed side) is fully embedded in the adhesive, ensuring the mechanical anchoring of the fabric in the adhesive. The curing time of the adhesive must be taken into consideration.

The tiles are installed directly over Schlüter®-DITRA-SOUND in accordance with the applicable regulations, using the thin-bed method. The adhesive bonds with the fleece fabric on the topside of the mat. This results in the complete bonding of the entire system.

Impact sound
The transmission of noises caused by footsteps or dropped objects to adjoining or underlying rooms is referred to as impact sound transmission. The floor/ceiling structure absorbs the structure borne noise and transmits the resulting impact sound in the form of airborne noise.

The human ear perceives impact sound that is muffled by 10 dB as airborne noise which is reduced by 50%.

Impact sound (e.g. the noise generated by hard shoes) is also reflected back into the room. This effect is multiplied in the case of light constructions and hard surfaces, leading to the so called drum roll effect. It can be completely eliminated by the high density of the heavy mat.

Summary of Functions:

a) Impact sound insulation
The heavy mat material absorbs much of the impact sound created by walking, for example, and reduces the drum roll effect. The insulation panel, therefore, is ideally suited for renovation and refurbishment projects in buildings, but also for new construction projects.

b) Crack bridging
Schlüter®-DITRA-SOUND can be used to bridge cracks, which are not expected to widen significantly or show height displacement. This ensures that cracks in the substrate are not transferred to the tile covering. If applicable, it may be necessary to install a feature to prevent height displacement.

c) Load distribution (load transfer)
Schlüter®-DITRA-SOUND is a heavy mat that cannot be compressed. Accordingly, tile coverings installed over Schlüter®-DITRA-SOUND are highly durable. If high traffic loads are expected (maximum 5 kN/ m2; e.g. in commercial applications), the tiles must be sufficiently thick and pressure stabilised for the corresponding application area. In areas with high traffic loads, it is particularly important that the tiles are fully embedded in the tile adhesive. As a rule, the impact of hard objects must be avoided on all ceramic coverings. Tiles should at least have a dimension of 5 x 5 cm.

Contact Schlüter-Systems Ltd

Units 3-5 Bardon 22,
Beveridge Lane, Coalville,
Leicestershire, LE67 1TE
Phone: +44 (0) 1530 813396

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We use the following symbols and abbreviations to illustrate our price charts.

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H = height
L = length
B = width

PL = euro pallet 
KV = case packaging 
BV = bundle (there is a 10 item bundle packaging for all the profile types)
P = box packaging 
R = roll
St. = unit