good fiberglass price?

[lasteclispe]

ok i went to homedepot to buy some fiberglass. i want to make a sub box to hold 2 12 ince subs later on but right now ill make something small like the tweeter holders at dsmtalk.com. i want to know if i overpaid for the stuff i got so far....

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i paid $5.70 for the 9 sq foot pack of fiberglass and i paid $11.00 for 1 quart of fiberglass resin. is that a good price? also how much packs of fiberglass and how much resin do i need for a 2 12 inch sub woofer box?....ty

 

[BlackNWhiteRS]

Well as for how much stuff you need, it depends on how big your box is gonna be, how heavy the fiberglass mat is, and if your building any part of the box out of MDF, thereby eliminating the need to cover it in this place.

As for the prices, I've heard going to a Boat Supply shop is the bets way, you can get a gallon of resin for around 20 bucks from what I've heard and thicker fiberglass matt, so you'll have to do fewer layers.

 

[The_Baldman]

ok i went to homedepot to buy some fiberglass. i want to make a sub box to hold 2 12 ince subs later on but right now ill make something small like the tweeter holders at dsmtalk.com. i want to know if i overpaid for the stuff i got so far....

You must be logged in to view this image or video.

i paid $5.70 for the 9 sq foot pack of fiberglass and i paid $11.00 for 1 quart of fiberglass resin. is that a good price? also how much packs of fiberglass and how much resin do i need for a 2 12 inch sub woofer box?....ty

To make a sub enclosure fo 2 12", you will need at least 2 gallons. the walls should be at least 3/8" thick. I suggest using a heavy guage fleece for my base, then reenforcing the inside with several layers of glass mat. To finish the outside, I use "Upal". It is a sprayable filler that can be sanded to a paint ready finish. I know it seems like alot of work, but this is the reason good fiberglass work is so costly.

 

[yoshimitsuspeed]

I agree at least two gallons I would probably have three on hand. If you are going to use fleece I would say more like three or four. Fleece sucks up an astonishing amount of resin. I am making one shaped off a 16 inch ball. The shell is a little under 3/8" and only used half the sphere I did solid glass (no fleece) and used over a gallon. Of course only about 2/3 of that is on the part the rest is in little cups in my garage and on the excess I cut off the sphere.
fiberglast.com will have much better prices if you want to order online. The first thing I would do is try to find someone locally who specializes in glass, either a store or someone who builds using it. Here we have a place called TAP plastics. A gallon of resin is $30 acetone is $8 and the glass should be considerably cheaper. Or you can try to find someone who builds boats, hot tubs, showers, ect. They get their supplies in bulk and would quite likley sell you stuff close to cost, plus if you find someone nice ( I just noticed you live in NY good luck ) they can give you advice. Also if you can watch some pros doing it you might get some ideas how to do it better and easier.

 

[BlackNWhiteRS]

I think 3/8th's inch thick fiberglass is a little insane. I've been a member over at sounddomain for quite some time and never heard anythbing like that. usually 6-8 layers i plenty thick enough, i evn saw a pic of a guy do 6 layers for a kick pod and then stand on the damn thing and it didnt even flex.

 

[devlish]

for subwoofers, 3/8" thick would be the minimum i'd go as well. if the sub rings are suspended by the glass alone, and not mounted to wood stilts or sides of the box, i'd go even thicker. but if you mount the sub rings using good solid stilts, 3/8" is about right. you can never go too thick, but too thin and your in for a lot of work!!

as for kick panels, they don't need to be as strong, your only holding 6.5" speakers. mine are probably 1/4" or less. and they are VERY strong

as for your prices, yeah... little high. i usually buy a gallon for $20-$25. or $7.99 for a Qt.

 

[Redmachine]

seriously go buy your supplies from a marine supply store, or a automotive repair store they have really thick fiberglass(the stuff you bought is 1/2 oz., they sell 3 oz. stuff, thats 6 times thicker)and resin. And its cheaper. They also sell gel coat, if you plan on finishing your project with paint. I learned my lesson.

 

[biddybengbeng]

you will need a LOT more fiberglass resin. also go to walmart and get some fleece. it's a great base and stretches well. i used about a gallon and a half on my box just for 1 12", about 1 cu ft. home depot has gallons for like 25 bucks or so. also get a fiberglass roller. it will help save a lot of time. heat guns save quite a bit of time as well if used right

 

[devlish]

you will need a LOT more fiberglass resin. also go to walmart and get some fleece. it's a great base and stretches well. i used about a gallon and a half on my box just for 1 12", about 1 cu ft. home depot has gallons for like 25 bucks or so. also get a fiberglass roller. it will help save a lot of time. heat guns save quite a bit of time as well if used right

i have a "how-to" on webpage that may help explain some of the processes for you. it'svery basic, but might help you with some of the procedures and get you going in the right direction or at least give you a few ideas, just modify it to your situation.

the front & back of my box is wood, but the sides and top/bottom are glassed to approx 3/8" thick. i think i used about 1 gallon only. starting with box carpeting, then reinforced with matting. well, just read it and you'll see. but i'm pretty sure it was only 1 gallon that i used.

 

[BlackNWhiteRS]

Well I must say, Devlish does have a superb install. How long did it take you to do all of that?

 

[devlish]

i don't really know, i lost track after 20+. if i had to guess i'd say 40-80 on & off over a month or so. that'd be for most of the audio install total. maybe a little more, i'm kind of a perfectionist on most things. if i did it again, i know it'd be less becuase that was my first big project and also a learning process for me.

i'm in the progess of doing a full install on my co-workers VW Golf. it's going VERY well so far.

i'll be doing another write up on that too i imagine. my new favorite tool: Air Nailer!!!

thanks for the compliments BTW.

~Kurt

 

[biddybengbeng]

i have a "how-to" on webpage that may help explain some of the processes for you. it'svery basic, but might help you with some of the procedures and get you going in the right direction or at least give you a few ideas, just modify it to your situation.

the front & back of my box is wood, but the sides and top/bottom are glassed to approx 3/8" thick. i think i used about 1 gallon only. starting with box carpeting, then reinforced with matting. well, just read it and you'll see. but i'm pretty sure it was only 1 gallon that i used.

that doesn't look too bad the only wood in mt box is the ring to mount the sub to. it's molded into the corner like the jl stealthbox, but the opposite corner where the 2g pocket is in the hatch. i gotta still have room for a stroller it's pretty thick, but i'm sure it isn't going anywhere. and it is way more than enough bass for me

 

[devlish]

thanks for the compliment. appreciated. yeah, i could see you using a little more resin then if only the trimring is wood. i figured why recreate a flat object, just a ton more work. the wood worked fine, kept it strong, and was easy for the flat pieces.

 

[biddybengbeng]

yeah, i have very little wood in my box and sprayed the hell out of it with deadener, not to mention it's pretty thick. i may have gone a bit overboard, but i could have a fat guy jump on it and it'd just hurt the fat guy when he fell on his ass when it rolled. i screwed it through the bottom of the box into the floor and it isn't going anywhere. i'll get some pictures up at some point, i just am too lazy/busy to take them. i just need to frame out something and make myself an amp rack. i put them on the back of the rear seats for the time being, just to have them put in because the kenwood deck in my car was pissing me off, and i wanted my eclipse back in. i just am unable to use this deck without external amplifiers but someday when i'm not busy at work i will start framing something out and make something look cool on the other corner of the trunk. but for now, blah. sounds a lot like work to me!

 

[sjwelna]

You can get fiberglass materials for very cheap online. I buy my stuff from www.shopmaninc.com Great selection of stuff and good prices.

If you need info on fiberglassing go to my webpage: http://www.sounddomain.com/memberpage/506803/4

That should cover just about anything you would need to know about fiberglassing.

-Steve