The sheets are available in thicknesses of 1 2 5 8 and 1 3 8 with dimensions of 4 x8 9 or 10 feet.
Stc drywall 2 sheets.
You might get something around stc 35.
You can find this type of drywall at your local home depot or by clicking this link.
5 8 metal studs 5 8 drywall 2 layers total plus batt insulation stc of 43 44.
The side that s gray or ivory should face the room.
Of course the 5 8 sheets of drywall will be much heavier than the 1 2 but now you can buy a lighter 5 8 sheetrock called usg ultralight firecode tapered edge gypsum board.
They are logarithmic values and cannot simply be added.
Tips for drywall sheets always choose thick sheets 1 2 or 5 8 if you re installing drywall on your ceiling.
It s important to know each side of the drywall sheet.
You cannot add stc ratings.
Thinner drywall sheets such as 1 4 or 3 8 will sag in between rafters over time.
With two total sheets of drywall common for residential interior walls we usually see an stc rating of around 33.
If you have an stc 33 wall and decide to add another sheet of drywall with an stc of 20 you do not get a finished wall with an stc of 53.