Fiberglassing problem
Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=77778
Printed Date: July 23, 2025 at 4:29 AM
Topic: Fiberglassing problem
Posted By: ottomatic481
Subject: Fiberglassing problem
Date Posted: May 14, 2006 at 8:46 PM
I am fiberglassing a box that holds 4 twelves. i did the left and right side with fiberglass becasue of the curbs but i did the rest of it with half inch mdf. Im covering the mdf with fiberglass so i can sand it and make it glassy looking but i dont know how many layers i should put on it. Any help would be nice.. Thanks!
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4 12's in a single cab f-150... yeah its nasty
Replies:
Posted By: Velocity Motors
Date Posted: May 14, 2006 at 10:25 PM
If it's a sealed enclosure & all 4 are sharing the same chamber then I'd say 1/2" - 5/8" thick would be enough. It will take you a while to do this but it will not flex either.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: bcordell
Date Posted: May 15, 2006 at 1:15 PM
I use the fiberglass rule of thumb that I picked up from someone I worked with. Press the fiberglass in with your thumb, if it flexes put more mat on that spot to stiffen it up. Do this all around your fiberglass portion of the box until there are no spots you can flex with your thumb. Your subs won't put nearly as much pressure into one little spot as pressing in with your thumb does, so if your thumb doesn't flex it, your subs won't.
Posted By: djfearny2
Date Posted: May 15, 2006 at 1:24 PM
also consider your subs. i have a 13w7 and its heavy so my fiberglass enclosure is thicker to support the weight and the pressure the sub creates.
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Jon
Installer/Help Technician
---coral springs florida---
mecp certification is not always needed. I have it and it has not helped me out at all. my experience out shines it.
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