Are those bricks good

pne of these days i'm gonna built two of the walls missing in my studio...(the space has two walls right now) http://www.johnlsayers.com/phpBB2/viewtopic.php?t=6068 What do you thing about thise blocks????? http://www.ytong.com/html/com/en/ytong_products.php?area_code=2 Am i ready to start? They say a wall 20cm with those has Rw 40dB and a 30cm one 44dB? seems good and will be better with insulation and gypsiumboars..... Do you think so????

It seems like it's relatively lightweight concrete with all those tiny air bubbles in it. Seems like it would be great for thermal insulation but not so good for sound isolation. I can't find any specs on the manufacturer's Web site... Not that there aren't any, but I can't find them if they're there. --Keith :mrgreen: