Soundproof drywall is a combination of gypsum boards and steel layers. Every layer increases mass and density, which are the most important aspects of good soundproofing materials. These can be an excellent choice for wall and ceiling soundproofing.

These are the most effective ways to soundproof existing walls from my list.

1. Add Insulation.
2. Install a Second Layer of Drywall With Green Glue.
3. Use Resilient Clips & Channels.
4. Add Mass Loaded Vinyl.
5. Build a New Wall in Front of Existing.
6. Install Acoustic Foam Panels.

There are various drywall types, but the Type X drywall is the most commonly used for soundproofing. It is a fire-resistant board, and a board of 5/8″ thickness can resist fire for an hour, which concurrently makes it the best drywall to reduce noise.

Advantages of gypsum board include low cost, ease of installation and finishing, fire resistance, sound control, and availability. Disadvantages include difficulty in curved surface application and low durability when subject to damage from impact or abrasion.

Plasterboard is then nailed to either side of this structure, and you have a wall! However, while this structure is great for quick and easy construction, it’s generally awful for soundproofing. What’s more, the air cavity between the two panels of plasterboard is an excellent space for sound waves.

If you think that soundproofing a wall, ceiling or floor only has one option, you are WRONG! The most inexpensive would be to add a second layer of drywall (5/8″ is recommended always) with Green Glue Soundproofing Compound in between the second layer and the first layer that is already painted and on your wall.

Gyproc do something called soundcoat which is a plaster put on the walls at about 5mm thick before dot and dab. It’s effectiveness will soon be tested as we’ve got to get a sound test done on the properties in the next coupla weeks! You need a load of Dysons fastened to the wall. Sound can’t travel through a vacum.

Gyproc SoundBloc. Gypsum plasterboard with a high density core for enhanced sound insulation performance. Gypsum plasterboard with a higher density core, designed for use in British Gypsum wall lining and partition systems where greater levels of sound insulation are required.

Gyprock Soundchek is not suitable where it would be in contact with water or a constant relative humidity above 90%. Gyprock acoustic plasterboard products fall into two categories – those for preventing sound transmission, and those designed to provide sound absorption.

Gyprock Soundchek is available in two thicknesses. Typically the 10mm product is used in residential walls and ceilings to create quiet zones and reduce disturbance from other activities within the home. It is ideal for use around studies, nurseries, bedrooms, laundries, ensuites, home theatres and for ceilings between storeys.