Frequently asked Questions

Below you will find answers to the most frequently asked questions about PhoneStar sound insulation boards. Detailed descriptions can be found in the Installation Instructions.

TOP-10 Questions about PhoneStar

Tip: First read the answer below and if you need more information, you can click on the hyperlink

  • Difference between PhoneStar Tri, Twin and Professional:
    Thickness: TRI                         15 mm
                         PROFESSIONAL 15 mm
                         TWIN                      10 mm
    Layers:        TRI                          3 parallel waves,
                         PROFESSIONAL  cross-over.
    TRI is optimized for walls.
    PROFESSIONAL tolerates more traction and bending force.
    Both are high resilient and universal applicable with up to 65 to/m².


  • Cutting PhoneStar:

    Cut the board with a jig oder circular hand saw with ceramic "Widia" blade.

    PhoneStar is cut horizontal and lying, the raw edge is shut with the Wolf Tape.


  • Is it possible to plaster PhoneStar directly to the wall?

    No, it is recommended to use plasterboard or timber panels as cladding.


  • Does sand trickle out when PhoneStar is screwed to the wall?

    No, the screw compresses the sand but must not be overtightened



  • PhoneStar board is wet:

    Normally, the boards get dry in the air. The capillary action of the inside waves removes the

    humidity outwards. A fitted PhoneStar is similar to the most other building materials related to the invasion of humidity.

    In individual cases, please speak to our application department.


  • How should the consistence of the floor be to lay PhoneStar?

    The floor must be sound, flat and dry.


  • Possible final coverings for PhoneStar:

    According to the Installation Instructions - almost everyone.

    Floating covering means a float mounting. Bonded covering means that PhoneStar

    is glued on the floor or 2 layers of PhoneStar are glued with each other.


  • What sound insulation reaches PhoneStar ?

    A 15 mm thick PhoneStar board reaches an airborne sound insulation of up to Rw=36dB.

    On a concrete ceiling  with laminate as final covering PhoneStar, 15mm thick, reaches

    an impact sound insulation of up to 22dB. More improvements are reachable through

    specific installations.

    You can find more information and about 100 examples of constructions

    on the sound insulation planning guide.


  • PhoneStar on a Solid Wall:

    Four variants are possible:

    1. Direct mounting with the acoustically decoupled Wolf System Dowels.

    2. Installing wooden battens as a substructure at a distance of 62,5 cm.

    3. Metal plume strip as a substructure for decoupling.

    4. Furring as a stud wall with PhoneStar.


    In general, mass-spring-mass systems provide better results.
    In all cases plasterboard is recommended for cladding. This should be

    screwed with gypsum in gypsum screws directly into the PhoneStar board

    to avoid sound bridges.


  • How can outlets be installed in a wall with PhoneStar?

    You have to mill out the PhoneStar board and to achieve the best solution

    you should use sound insulation boxes. The cutout is done at a lying PhoneStar

    board and in the end you mask the cut surface with the Wolf Tape.       





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