Soundproofing Gypsum Tiles

[Pouatchee]

Hi all,

i have to soundproof some walls and i am looking for the traditional gypsum based soundproofing ceiling tiles that used to be in my classrooms as a kid. i never used to understand what they were for when i was a kid and i often tried to count the holes--damn i must've been bored

 

enough of that...  does anyone know without a doubt where i can find'em? looked on shopee, lazada and major construction shops around but it seems they fell out of favour and just cant find'em anymore. 

 

thx ahead

Edited January 28 by Pouatchee