I want to increase the mass upstairs during the renovation. For example, earlier, the wall frames were covered by only 1-1 layer boards; now, they would be covered by 2-2 layer gypsum boards and 1-1 layer Mass-Loaded Vinyl. The structural engineer came, measured and they said I have to double...
I hope somebody can help me. I have fan trusses:
Chords are made from 35x90 timber.
The bottom chord is about 10m (33.28 feet). We have to move a new MVHR unit to the attic but the shortest edge of the unit is 60cm (23.62"), meanwhile, the largest gap between trusses is 58cm (22.83").
Which...