Sound Insulation for Walls

What is the problem?
Lightweight room dividing walls made of plasterboard or wood board, allow sound to easily travel through. You can literally follow conversations, which strongly limits your privacy. The lack of mass implies a lack of insulation value (mass = insulation). The problem with walls placed under a system ceiling is that they (often) do not connect to the architectural ceiling. A wall cannot be insulated without a solid connection between the architectural ceiling and the floor!


What is the solution?
In short, make sure there is a qualitative connection between the architectural floor and the architectural ceiling or roof. Detect, possibly by using a lamp, seams and cracks that cause sound leakage (especially with walls that are perpendicular to the wall to be insulated). Apply a layer of Stauf glue to the side of the Isomat which contains jute and mount it against the wall using screws with a flat head. Then, mount a plaster or wood board on top of the Isomat. For optimal results, do this on both sides of the wall. The heavier the wall, the better the end result. The double method can reduce the sounds you perceive by 40%. In case of studio construction it is recommended to additionally insulate the walls with a floating Merfoflex retaining wall.


You will find an extensive "Wall insulation step-by-step plan" on our tips page.

Make your own acoustically insulated walls
If you want to divide a room into several rooms, make sure that the walls you install are heavy, floating (if possible) and without sound leaks. Make a frame of wooden beams with a size of at least 60 x 40 mm and place them centre-to-centre with a distance of 600mm. Place Akoestiwol PE60 cavity filling between the beams and close the wall with Merfoplex or a double layer of plaster or wood board with Isomat KE14 in between. The heavier you make the wall, the higher the insulation value.

If you are going to place a door in this wall, make sure that the door has approximately the same insulation value. You will also find sound-insulating wood and steel doors in our webshop and a "Step-by-Step Plan for Door Insulation" on the tips page.

Below you will find products to insulate walls

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  1. Isomat KE Fiber
    Isomat KE Fiber
    Sound-insulating mat
    • Heavy plastic ground plane
    • Sound insulating
    • Resistant to water, oil and many solvents and cleaning agents

    Starting at £27.00

    £45.48
    (incl. tax)
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Constructive sound insulation
More solutions for insulating walls, floors and ceilings can be found on the overview page Structural sound insulation. Related to this are the pages about burengeluid.