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Old 05-25-2023, 12:25 PM   #21
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Does this carpet underpayment come in various widths? We also have a runner down the salon with no sound reducing material only a PIA mat to help hold runner in place. I have added Soundown 2Ē material to the 6 engine hatchs (what a difference) and would like to add the carpet underlay to the runner.
All the Soundown Carpet underlays come 54" wide and Soundown cuts to length. A razor knife cuts it easily. I suggest the 1lb as the 2lb does not lend itself to rolling up or flipping back for ER access.

I used the 1/2" 1lb, and trimming the foam back from the MLV worked great to make transitions. It's also available in 1/4", but you lose the plush feel.

Once I had an exhaust leak, and the print of the hatches was clearly outlined on the bottom of the underlay demonstrating leakage.

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Old 05-25-2023, 12:56 PM   #22
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Thanks for the response. Iím certain this will help with db level plus the runner will most likely stay in place and not roam like what we are using under carpet runner.
What material did you use for the bilge? Any pictures?
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Old 05-25-2023, 01:24 PM   #23
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Thanks for the response. Iím certain this will help with db level plus the runner will most likely stay in place and not roam like what we are using under carpet runner.
What material did you use for the bilge? Any pictures?
The underlay goes foam side down, so it stay put pretty good. It's also heavy, that's what stops the noise, mass. That helps it stay in place as well.

https://soundown.com/architecture/carpet-underlayment/

The "curtain" I described is made from MLV, the same black rubber like sheet in the carpet underlay and insulation with a barrier. Mass Loaded Vinyl is impervious to water and oil and fuel resistant so the materiel lends itself to this application.

Soundown sells MLV, its available through many sources including online, Lowes and Home Depot.

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Old 05-25-2023, 03:40 PM   #24
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In a previous boat we used the 2 pound underlayment under the carpet in the salon. The engine room was too difficult to get insulation on the overhead so I went with the underlayment. Worked very well and was easy to install. The carpet guy laid it before he installed the carpet. Only problem was it came in a 400 pound roll. I had the shipping company lay it on the ground so I could cut it into manageable pieces. But I blew my knee out when I was climbing into the bed of the truckÖ
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Old 05-25-2023, 04:49 PM   #25
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In a previous boat we used the 2 pound underlayment under the carpet in the salon.
Tell him what it feels like to step on
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Old 05-25-2023, 05:01 PM   #26
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It fellt like a fairly good carpet pad.
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Old 05-25-2023, 05:21 PM   #27
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Iím at 68db at 2000 rpm and gen running. QSB engines start out quiet. 2Ē SD and a decent carpet. Finding those sound leaks really help. Go around with your DB meter and hunt them down
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