I was looking to sound proof/isolate a wall between me and a neighbour in a townhouse. I worked with Pascal to get a quote and an idea of what can be done. There were 3 different steps taken to try and improve the sound isolation between units.
1) Drill and fill the existing drywall. Holes were drilled and dense insulation was packed. the holes were then patched
2) Installed Sonopan (sound isolating dense foam boards) on top of the existing drywall.
3) Install another layer of drywall over the Sonopan boards.
Overall, it seems the noise from neighbours is reduced by around 80% and it is significant. I can no longer hear any voices (buzzing sound through the wall). There is still a faint sound if there are people running around.
The experience of working with Warm Cozy Cozy was pleasant. The person doing the majority of the work was extremely polite and hard working. Every day before leaving, he would vacuum everything and make sure the house is in good shape. The stairs and all the stuff in the room was also covered. The job was suppose to take 2 days, but due to some issue with the screws, it took an extra half a day, but these things happen in construction.
The entire experience was pleasant and i would definitely use their services again if needed.