pxcr440 10+ year member
Member
how thick does the fiberglass walls have to be to not get the nasty echo sounds that are common
yeh, anywhere from 1/2-3/4.. 7-8 layers should be fine, if properly done.Originally posted by Prozac Out of all the research that I have done, most people say that it should be 7-8 layers thick or about 1/2". Hope this helps.