Soundproofing for Interior Walls & Party Walls

Soundproofing for interior walls
Lightweight room dividing walls made of plasterboard or plywood, allow sound to easily travel through. The lack of mass in interior walls implies a lack of soundproofing properties. The problem with walls placed under a system ceiling is that they (often) do not connect to the structural ceiling or roof of the building. A wall cannot be soundproofed without a solid connection between the architectural ceiling and the floor.

How to soundproof interior plasterboard walls
In short, make sure there is a qualitative connection between the floor and the 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). To soundproof a plasterboard or wooden interior wall you need to add mass in the form of a mass loaded vinyl, such as Isomat KE Fiber. Apply a layer of Stauf glue to the side of the Isomat which contains jute and mount it against the wall using screws or nails with a flat head. When the whole wall is covered, soundproofed, with Isomat KE, finish the Isomat with plasterboard or plywood. For optimal results, do this on both sides of the wall. The heavier the wall becomes, the better the end result. This double soundproofing method can reduce the sounds you perceive by 40%. You will find an extensive "Wall insulation step-by-step plan" on our tips page.

How to soundproof interior brick walls
When an interior wall is heavier than a plasterboard wall, it's better to soundproof the wall by installing a decoupled false wall. With the help of Akoestikon Acoustic Studs you can make such a wall. These decoupled slats soundproofs impact noise as well as airborne noise. On the Akoestikon page we describe in detail how to install a decoupled wall using these acoustic studs. system.

How to make a soundproofed interior wall
If you want to divide a room into several rooms, make sure that the walls you build are heavy, decoupled (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 about 600 mm. Fill empty voids with Acoustic Cotton Wool, as cavity filling between the beams, and close the wall with a double layer of plasterboard, or plywood, with Isomat KE14 in between. Isomat insulate vibrations, and therefore sound, better than plasterboard. Again, the heavier you make the wall, the better the soundproofing.

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 a "Step-by-Step Plan for Door Insulation" on the tips page. And as always, if your have any questions, please let us know, we are happy to help!

Products to soundproof interior walls