how many layers??

[SPL140.2 5,000+ posts]

im still a noob at fiberglassing, how many layers do i have to put down to make an enclosure very, very rigid??? itll be going over a cardboard base.

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[crazy4ozs]

until you can stand on it...so id say 5-6

 

[crazy4ozs]

or i guess 7-9 if you going by the poll

 

[SPL140.2 5,000+ posts]

going over 7 is that overkill??

 

[CBFryman2 5,000+ posts]

Depends entirely on the enclosure, On curved areas you dont need as much, on flatter areas you need more layres.

THe best tests are standing on the area and pushing as hard as you can with your thumb. Pushing as hard as you can with your thumb and standing on it will both put more pressure on it than your stereo system ever could so if it doesnt flex you are good.

 

[SPL140.2 5,000+ posts]

yes it will be a circular "tube" enclosure

 

[rollerdj 10+ year member]

what size / type sub are you putting in there. some cheap 10'' sub isn't going to be nearly as strong as a, lets say, a 15" RE XXX. the bigger and nastyer the sub, the more layers you would wanna put on. i would say if it's not going to have any flat spots in it, 7 or 8 would be just fine.

 

[PowerNaudio 10+ year member]

like stated above you have to test the panel by applying pressure to it, in order to know if the panel is strong enough. i would start with 7 layers, then test the strength and add mare layers accordingly and if necessary. a way to make the enclosure stronger is to add bracing to the enclosure, in a fiberglass enclosure i have found that its comfortable to use 1/2" polyester rope which conforms to the curved faces of the panels and makes for a very strong brace that can be resined in place.

 

[SPL140.2 5,000+ posts]

what size / type sub are you putting in there. some cheap 10'' sub isn't going to be nearly as strong as a, lets say, a 15" RE XXX. the bigger and nastyer the sub, the more layers you would wanna put on. i would say if it's not going to have any flat spots in it, 7 or 8 would be just fine.

10" HD3

 

[SPL140.2 5,000+ posts]

going over 7 is that overkill??

I think im just gonna do 10-12 layers to be on the safe side //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[ramos 5,000+ posts]

What weight mat ? Makes a huge difference. 5 layers of 5oz is a lot weaker than 5 layers of 15oz biaxial //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[CBFryman2 5,000+ posts]

What weight mat ? Makes a huge difference. 5 layers of 5oz is a lot weaker than 5 layers of 15oz biaxial //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

x2

Though he is probably using 5-6oz stuff from Home Depot.

Also, Move to cloth. Two layres of cloth with the weaves at 90* from each other is stronger than two layres of mat when the two are the same weight.

Cloth has directional strength, mat sacrafices directional strength to be stronger in all directions but you can criss cross cloth to gain back the strength in any direction.

 

[ramos 5,000+ posts]

x2
Though he is probably using 5-6oz stuff from Home Depot.

Also, Move to cloth. Two layres of cloth with the weaves at 90* from each other is stronger than two layres of mat when the two are the same weight.

Cloth has directional strength, mat sacrafices directional strength to be stronger in all directions but you can criss cross cloth to gain back the strength in any direction.

Not necessarily. Usually the reason one is chosen over the other is that cloth conforms better to curvy surfaces , where as mat tends to be harder to lay on the curvy surfaces . Changing the bias with each layer of mat will yield just as strong a final product . Mat builds thickness a lot quicker than cloth as well . //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[CBFryman2 5,000+ posts]

I stand corrected. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[SPL140.2 5,000+ posts]

pics of the cloth??, i do have mat from home depot