Is 3 layers of glass good ?

I'm doing my first fiberglass box and I was wondering if 3 layers of fiberglass is good enough for  2  8" rockford fosgates?

should be, alot of people use the rule of if it's strong enough to stand on it, and slightly bounce a little, and doesn't flex or anything it's strong enough[IMG]http://webpages.charter.net/turbokl/pnwavatar.jpg" height=80>

3 layers of what weight fibreglass ? the thicker the fibreglass the less layers you have to put on .

Yeah don't be cheap like me haha.  Im pretty sure you're using 1.5 oz mat (common).  If so, I think anywhere from 4-6 layers is good, you dont have to go crazy cause theyre probably wont be too much flex since you will have the tire well behing is as reinforcement around and behind it.Im a fiberglass whore!!

I've used as little as 3 layers for a single 10, it's not recomended but I had a lot of curves so it got really strong really fast. I'd suggest 4-6 like Accord said if u have longer flat surfaces or when u put the 3 layers down it still flexs."Shiny chrome when used in conjunction with bikini models is particularly effective in inducing brain deficit disorder"

02 Jeep Grand Cherokee

Monster System on its way.

thanks for the info guys.oh  yeah on the rule of thumb that if its strong enough to stand on  and flex a little, well what if your a 230lb + guy?lmao. Like hottacord wrote I think its 1.5 oz  fiberglass mat I want to say andi think I'll add 2 more for good measure.

haha I weigh about 225 lbs and I still havent dared to stand on any of my fiberglass projects in fear I might have to start all over again and say bye to all the $$ I put into the project!Im a fiberglass whore!!

this is prolly going to be a really stupid question. but how much $$ are you using for this project? Just for the mdf wood + fiberglass. thanks

Well I dont know if you were asking hottaccord or me but you need a little more than that I do know.You need tape, foil ,gloves, brushes,hot glue gun or stapler fiber glass [$10 to $30 ]the mat, the fleece some dowl rods or some type of support for the mdf rings, maybe some screws glazing putty[ around$25] primer, paint, or carpet. ect. Oh yeah and time.