Upon completion of the HVAC tasks, the drywall crew swiftly took over. They began by installing wooden reinforcements for the Atmos speakers before moving on to the perforated plates. Rigitone 8-15-20 Super comprises a 12.5mm gypsum core, with an irregular array of 8mm, 15mm and 20mm circular perforations. The back of the board incorporates a black acoustic fleece which also provides sound absorption performance.
We’re all familiar with the fact that such thickness is more or less ineffective in small room acoustics, so the crucial aspect will be the 60 cm of rockwool insulation above the ceiling. Theoretical calculations are showing some pretty impressive results from the subsequent layers:
- 1 perforated drywall: 12,5 mm
- 2 air between the slats: 60 mm
- 3 thermal/acoustic insulation: 600 mm
- 4 empty space: 600-900 mm
- 5 rigid backing: concrete roof tiles
Connecting the underground
This task fell squarely on my shoulders—a satisfactory endeavor for those who despise the sight of tangled cables. Determined to have access to the gear rack from every conceivable angle, I opted for drainage hoses this time around, ditching the central vacuum cleaner tubes I relied on in my first room. Nothing wrong with them, they’re perfectly fine. You just don’t get them in a local hardware store. Most of the hoses have a 50 mm diameter, while in areas where they don’t intersect with the HVAC hoses, the diameter expands to 75 mm. Things took a wild turn as I attempted to thread my DIY speaker cables through the 50 mm hole. Let’s just say, it was a snug fit!
