How much dyna mat is needed for the cabin |
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How much dyna mat is needed for the cabin |
mb911 |
Sep 15 2018, 08:37 PM
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#1
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
Any idea how much dyna mat people use to do the whole cabin? Anyone use something other then dynamat that was more cost effective?
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Chi-town |
Sep 15 2018, 09:53 PM
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#2
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Senior Member Group: Members Posts: 850 Joined: 31-August 18 From: Disneyland Member No.: 22,446 Region Association: Southern California |
The proper way would be to mimic the original tar paper. You don't need to coat the whole floor and rear wall.
The way dynamat controls sound is absorbing vibration and resonation. If you're looking for actual sound insulating material check out something more like this http://designengineering.com/under-carpet-...eadening-layer/ |
mgp4591 |
Sep 15 2018, 10:36 PM
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#3
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914 Guru Group: Members Posts: 5,374 Joined: 1-August 12 From: Salt Lake City Ut Member No.: 14,748 Region Association: Intermountain Region |
Check out Fat Mat and Noico for some good options.
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Blue6 |
Sep 15 2018, 10:53 PM
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#4
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Senior Member Group: Members Posts: 1,035 Joined: 3-October 13 From: SoCal Member No.: 16,470 Region Association: Southern California |
Ben,
I did the entire cabin in the matting. Also did the door skins, and the cabin side of the firewall. I have a 2.7 with Weber’s. The insulation removed unwanted road noise, but still let’s me hear the beautiful exhaust note... |
Larmo63 |
Sep 15 2018, 10:58 PM
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#5
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Advanced Member Group: Members Posts: 4,264 Joined: 3-March 14 From: San Clemente, Ca Member No.: 17,068 Region Association: Southern California |
Ben, I did the entire cabin in the mating. Also did the door skins, and the cabin side of the firewall. I have a 2.7 with Weber’s. The insulation removed unwanted road noise, but still let’s me hear the beautiful exhaust note... You were mating in your cabin? Hmmmm..... |
bbrock |
Sep 15 2018, 11:05 PM
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#6
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
After spending way too much time researching this, I'm going to go with Noico replacing just the areas of the original tar. Way less expensive than Dyna mat.
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mb911 |
Sep 16 2018, 05:34 AM
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#7
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
I also see peel and seal is something that folks use.
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mepstein |
Sep 16 2018, 05:43 AM
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#8
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
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mb911 |
Sep 16 2018, 06:19 AM
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#9
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
I also see peel and seal is something that folks use. You should be able to take some quick measurements of the areas you need. I would do all the thin gauge steel areas in the cabin. Floors, firewall, doors, wheel arches. Don’t use any asphault based material. Thats interesting. If you go on lowes website and reviews peel and seal is extremly highly rated with the car guys and it is asphault based. They also noted that it doesnt smell in the cabin. I might buy some and see what its like. Only costs about 17 bucks for a 25 foot roll. Might be worth a shot.. Factory tar would have been ashpault based correct? I would think so. |
bbrock |
Sep 16 2018, 08:28 AM
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#10
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Good luck finding objective information on the Intertubes. Ninety-nine percent of whats out there seems to be unsupported marketing hype, experiences from people who used product X with no objective comparison to other products, or armchair experts parroting what they've read from the other two categories. The best info I've been able to glean boils down to this:
Butyl vs Asphalt - the problems with asphalt-based products is that it melts at a lower temperature than butyl, and it stinks. Apparently it can fail when the car gets hot. Smell varies with product. It's also a lot less expensive than butyl so that's a big plus. Constrained Layer Dampener - This is the big one for me. According to acoustic engineers, that layer of foil or other somewhat rigid material on top significantly enhances the sound dampening ability of the product by sandwiching the visco-elastic layer between two rigid materials. There's physics behind it, but I was convinced. As for peel and seal, it is a free layer so will provide sound dampening, but supposedly not nearly as much as the foil-faced specialty products. I haven't found objective data about how much better though. Also, I've used peel and seal on roofs and the stuff stinks like hell. I don't trust anyone who says X doesn't stink. We just bought a new mattress that all the reviewers claimed didn't smell bad out of the box. It was a week before we could sleep on the damn thing without choking. If I were going to go back in with a free layer asphalt product, I'd probably just buy the die cut tar kit from George . At least you'd know you were getting as good as factory. I'm hoping to improve sound deadening a bit with more modern products. |
mb911 |
Sep 16 2018, 08:39 AM
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#11
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
Good luck finding objective information on the Intertubes. Ninety-nine percent of whats out there seems to be unsupported marketing hype, experiences from people who used product X with no objective comparison to other products, or armchair experts parroting what they've read from the other two categories. The best info I've been able to glean boils down to this: Butyl vs Asphalt - the problems with asphalt-based products is that it melts at a lower temperature than butyl, and it stinks. Apparently it can fail when the car gets hot. Smell varies with product. It's also a lot less expensive than butyl so that's a big plus. Constrained Layer Dampener - This is the big one for me. According to acoustic engineers, that layer of foil or other somewhat rigid material on top significantly enhances the sound dampening ability of the product by sandwiching the visco-elastic layer between two rigid materials. There's physics behind it, but I was convinced. As for peel and seal, it is a free layer so will provide sound dampening, but supposedly not nearly as much as the foil-faced specialty products. I haven't found objective data about how much better though. Also, I've used peel and seal on roofs and the stuff stinks like hell. I don't trust anyone who says X doesn't stink. We just bought a new mattress that all the reviewers claimed didn't smell bad out of the box. It was a week before we could sleep on the damn thing without choking. If I were going to go back in with a free layer asphalt product, I'd probably just buy the die cut tar kit from George . At least you'd know you were getting as good as factory. I'm hoping to improve sound deadening a bit with more modern products. I think the peel and seal is foil backed according to what I read.. I might buy a little of each to see for myself. |
mepstein |
Sep 16 2018, 08:58 AM
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#12
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region |
I was in a car that had used peal and seal. On a hot day, it smelled like tar. There are dynamat copies that are lighter, cheaper and work fine. Amazon has good prices.
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mb911 |
Sep 16 2018, 09:03 AM
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#13
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
I was in a car that had used peal and seal. On a hot day, it smelled like tar. There are dynamat copies that are lighter, cheaper and work fine. Amazon has good prices. Noico, hushmat, fat mat are also options. Trying to figure what is really going to work best for me.. I dont want it to smell. |
bbrock |
Sep 16 2018, 09:07 AM
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#14
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Good luck finding objective information on the Intertubes. Ninety-nine percent of whats out there seems to be unsupported marketing hype, experiences from people who used product X with no objective comparison to other products, or armchair experts parroting what they've read from the other two categories. The best info I've been able to glean boils down to this: Butyl vs Asphalt - the problems with asphalt-based products is that it melts at a lower temperature than butyl, and it stinks. Apparently it can fail when the car gets hot. Smell varies with product. It's also a lot less expensive than butyl so that's a big plus. Constrained Layer Dampener - This is the big one for me. According to acoustic engineers, that layer of foil or other somewhat rigid material on top significantly enhances the sound dampening ability of the product by sandwiching the visco-elastic layer between two rigid materials. There's physics behind it, but I was convinced. As for peel and seal, it is a free layer so will provide sound dampening, but supposedly not nearly as much as the foil-faced specialty products. I haven't found objective data about how much better though. Also, I've used peel and seal on roofs and the stuff stinks like hell. I don't trust anyone who says X doesn't stink. We just bought a new mattress that all the reviewers claimed didn't smell bad out of the box. It was a week before we could sleep on the damn thing without choking. If I were going to go back in with a free layer asphalt product, I'd probably just buy the die cut tar kit from George . At least you'd know you were getting as good as factory. I'm hoping to improve sound deadening a bit with more modern products. I think the peel and seal is foil backed according to what I read.. I might buy a little of each to see for myself. Come to think about it, I have a partial roll of the foil faced stuff on the garage shelf. I'd forgotten you can get it with or without. I can't imagine it would be that expensive to set up some test panels to actually measure the sound attenuation of these different products. But darned if I can find anything like that. I hate having to sift through marketing hype. |
mb911 |
Sep 16 2018, 09:17 AM
Post
#15
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
Good luck finding objective information on the Intertubes. Ninety-nine percent of whats out there seems to be unsupported marketing hype, experiences from people who used product X with no objective comparison to other products, or armchair experts parroting what they've read from the other two categories. The best info I've been able to glean boils down to this: Butyl vs Asphalt - the problems with asphalt-based products is that it melts at a lower temperature than butyl, and it stinks. Apparently it can fail when the car gets hot. Smell varies with product. It's also a lot less expensive than butyl so that's a big plus. Constrained Layer Dampener - This is the big one for me. According to acoustic engineers, that layer of foil or other somewhat rigid material on top significantly enhances the sound dampening ability of the product by sandwiching the visco-elastic layer between two rigid materials. There's physics behind it, but I was convinced. As for peel and seal, it is a free layer so will provide sound dampening, but supposedly not nearly as much as the foil-faced specialty products. I haven't found objective data about how much better though. Also, I've used peel and seal on roofs and the stuff stinks like hell. I don't trust anyone who says X doesn't stink. We just bought a new mattress that all the reviewers claimed didn't smell bad out of the box. It was a week before we could sleep on the damn thing without choking. If I were going to go back in with a free layer asphalt product, I'd probably just buy the die cut tar kit from George . At least you'd know you were getting as good as factory. I'm hoping to improve sound deadening a bit with more modern products. I think the peel and seal is foil backed according to what I read.. I might buy a little of each to see for myself. Come to think about it, I have a partial roll of the foil faced stuff on the garage shelf. I'd forgotten you can get it with or without. I can't imagine it would be that expensive to set up some test panels to actually measure the sound attenuation of these different products. But darned if I can find anything like that. I hate having to sift through marketing hype. I just found some Noico 50 sf for 60 bucks delivered.. I will start there and see how far it goes. |
McMark |
Sep 16 2018, 11:54 AM
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#16
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Covering every surface is a huge waste of material for minimal effect. The larger and flatter the panel, the more deadening you need. Also the thinner the metal the more you need. So the large areas of floor pan, the firewall, the inner fender wells, the inside of the door skins -- these are all great places to improve the sound. Covering the center tunnel, longitudinals, lower firewall box section -- these are already thicker metal, smaller sections (which increases rigidity) that don't need much/any sound deadening.
I use Damplifier Pro from Second Skin Audio |
bbrock |
Sep 16 2018, 12:02 PM
Post
#17
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Good luck finding objective information on the Intertubes. Ninety-nine percent of whats out there seems to be unsupported marketing hype, experiences from people who used product X with no objective comparison to other products, or armchair experts parroting what they've read from the other two categories. The best info I've been able to glean boils down to this: Butyl vs Asphalt - the problems with asphalt-based products is that it melts at a lower temperature than butyl, and it stinks. Apparently it can fail when the car gets hot. Smell varies with product. It's also a lot less expensive than butyl so that's a big plus. Constrained Layer Dampener - This is the big one for me. According to acoustic engineers, that layer of foil or other somewhat rigid material on top significantly enhances the sound dampening ability of the product by sandwiching the visco-elastic layer between two rigid materials. There's physics behind it, but I was convinced. As for peel and seal, it is a free layer so will provide sound dampening, but supposedly not nearly as much as the foil-faced specialty products. I haven't found objective data about how much better though. Also, I've used peel and seal on roofs and the stuff stinks like hell. I don't trust anyone who says X doesn't stink. We just bought a new mattress that all the reviewers claimed didn't smell bad out of the box. It was a week before we could sleep on the damn thing without choking. If I were going to go back in with a free layer asphalt product, I'd probably just buy the die cut tar kit from George . At least you'd know you were getting as good as factory. I'm hoping to improve sound deadening a bit with more modern products. I think the peel and seal is foil backed according to what I read.. I might buy a little of each to see for myself. Come to think about it, I have a partial roll of the foil faced stuff on the garage shelf. I'd forgotten you can get it with or without. I can't imagine it would be that expensive to set up some test panels to actually measure the sound attenuation of these different products. But darned if I can find anything like that. I hate having to sift through marketing hype. |
tazz9924 |
Sep 16 2018, 03:03 PM
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#18
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Senior Member Group: Members Posts: 703 Joined: 31-May 15 From: Mooresville NC Member No.: 18,779 Region Association: None |
If you want a very cheap but still good alternative, aluminum roof repair rolls they sell at Home Depot work well. Their like a 6”x25’ roll for 15-20$ i think
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mb911 |
Sep 16 2018, 04:15 PM
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#19
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914 Guru Group: Members Posts: 6,851 Joined: 2-January 09 From: Burlington wi Member No.: 9,892 Region Association: Upper MidWest |
If you want a very cheap but still good alternative, aluminum roof repair rolls they sell at Home Depot work well. Their like a 6”x25’ roll for 15-20$ i think I chose nico branded material. 50 sf.. We will see what its like. The peel n seal just is not worth the gamble.. I want to enjoy driving the car .. Not smelling ashpalt. |
worn |
Sep 16 2018, 09:02 PM
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#20
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can't remember Group: Members Posts: 3,156 Joined: 3-June 11 From: Madison, WI Member No.: 13,152 Region Association: Upper MidWest |
I also see peel and seal is something that folks use. You should be able to take some quick measurements of the areas you need. I would do all the thin gauge steel areas in the cabin. Floors, firewall, doors, wheel arches. Don’t use any asphault based material. Thats interesting. If you go on lowes website and reviews peel and seal is extremly highly rated with the car guys and it is asphault based. They also noted that it doesnt smell in the cabin. I might buy some and see what its like. Only costs about 17 bucks for a 25 foot roll. Might be worth a shot.. Factory tar would have been ashpault based correct? I would think so. I used dynamat or the off brand substitute from Eastwood. I did a lot of the back wall and most of the floor. It seems more than adequate under the carpet. Did more than 5000 miles this summer. |
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