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Old 09-25-2022, 02:14 AM   #1
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Model: 2016 Hurricane 29M
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THOR #3923
What modifications have you done to quiet the interior of your coach?

I'd like to know what people have done to decrease the sound inside the coach.

I have a 29M and when I'm driving down a Hwy that isn't in great shape, the coach sounds like it is going to fall apart because it's so noisy.

The cabinets above the windshield rattled like crazy so I put some felt sick-on's and that solved that problem. Then I have the bedroom and bath doors...they rattle like crazy.

I did take off the engine cover (well not completely), an felt the underside...I could tell there was insulation there, so I just closed that back up.

I have been thinking of perhaps putting carpet around the cab (seats/engine) thinking perhaps that would quiet the road noise. And if it got dirty, I could just lift it out and shake it out.

If you made some sound improvements when it comes to noise, I'd like to hear them.

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Old 09-25-2022, 02:42 AM   #2
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THOR #7035
Take that engine cover back off and start there - dozens of threads here detailing installing Dynamat and other sound deadening material on the cover and below the floor.
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Old 09-25-2022, 04:34 AM   #3
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Originally Posted by 16ACE27 View Post
Take that engine cover back off and start there - dozens of threads here detailing installing Dynamat and other sound deadening material on the cover and below the floor.
Hey Ted...I did search the forum but only found a couple of threads...perhaps I wasn't using the right search words.

As I mentioned, there is an insulation material on the inside of the cover...can I put the Dynamat on top of it, or do I have to remove what is in there and then put this on?

I know you did some other things...but that was in a post I had created that wasn't specifically dedicated to sound deadening.
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Old 09-25-2022, 07:37 AM   #4
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The threads explain the engine cover part. Remove the heat shielding, apply Kilmat or Dynamat, then replace the heat shielding... lest ye melt the Dynamat...

Then do the floor as detailed in the threads. Use those as tutorials for anywhere else you wish to apply sound deadening foam.

It's why premium $$$$ coaches put carpet lining in their storage bins.

As a bonus, read up on sound resonance... it will help you determine the most effective areas to insulate.
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Old 09-25-2022, 08:37 AM   #5
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Originally Posted by Chateau_Nomad View Post
The threads explain the engine cover part. Remove the heat shielding, apply Kilmat or Dynamat, then replace the heat shielding... lest ye melt the Dynamat...

Then do the floor as detailed in the threads. Use those as tutorials for anywhere else you wish to apply sound deadening foam.

It's why premium $$$$ coaches put carpet lining in their storage bins.

As a bonus, read up on sound resonance... it will help you determine the most effective areas to insulate.
What threads? The reason I asked this question and as I said to ACE, I couldn't find information in what people did.
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Old 09-25-2022, 04:20 PM   #6
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This is one that I am going to take ideas from.


https://www.thorforums.com/forums/f2...tes-24988.html
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Old 09-25-2022, 06:30 PM   #7
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i will add, sound mat installations on wheel wells makes a huge difference as well
peel back the plastic fender liner and add the mat to the metal skin and then put liner back in.
world of difference in the reverbs
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Old 09-25-2022, 06:41 PM   #8
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Originally Posted by happy View Post
This is one that I am going to take ideas from.


https://www.thorforums.com/forums/f2...tes-24988.html
Thanks for posting that link. Good info there.
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Old 09-25-2022, 06:43 PM   #9
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Originally Posted by powerboatr View Post
i will add, sound mat installations on wheel wells makes a huge difference as well
peel back the plastic fender liner and add the mat to the metal skin and then put liner back in.
world of difference in the reverbs
What kind of mat?
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Old 09-25-2022, 06:52 PM   #10
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Quote:
Originally Posted by Chateau_Nomad View Post
The threads explain the engine cover part. Remove the heat shielding, apply Kilmat or Dynamat, then replace the heat shielding... lest ye melt the Dynamat...

Then do the floor as detailed in the threads. Use those as tutorials for anywhere else you wish to apply sound deadening foam.

It's why premium $$$$ coaches put carpet lining in their storage bins.

As a bonus, read up on sound resonance... it will help you determine the most effective areas to insulate.
Quote:
Originally Posted by Jusplainwacky View Post
What kind of mat?
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Old 09-25-2022, 06:57 PM   #11
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THOR #3923
Dynamat vs Kilmat

https://soundproofcentral.com/dynamat-vs-kilmat/

Here is another link that discusses the various sound deadening material. It has a lot of good information.

https://soundproofguide.com/fatmat-v...co-vs-dynamat/
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Old 09-25-2022, 08:06 PM   #12
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see above
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Old 09-25-2022, 09:04 PM   #13
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Quote:
Originally Posted by powerboatr View Post
see above
For? If you're responding to a specific post it adds continuity if you QUOTE it.
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Old 09-25-2022, 09:22 PM   #14
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I notice that my bedroom/bath door rattle like crazy. I stuck a sponge between them and that stopped them banging...this to me is kind of hooky...any other ideas?

What have people done when it comes to dishes, bowels, pans, racks in the oven...etc?
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Old 09-25-2022, 09:40 PM   #15
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Towels, cookies in packages, pot holders etc... get stuffed between our clanky things in the drawers and cabinets. Last trip a couple things got moved from pots and pans to the bed as we drove. Towel was placed under the glass in the microwave.
Somebody posted that they put a beachball between their slide and the coach wall and blow it up slightly to keep slide quite. Nothing is hooky if it works for you.
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Old 09-25-2022, 10:22 PM   #16
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Anyone use "B-Quiet"? Claims to be the same as Dyamat at half the cost.
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Old 09-25-2022, 10:35 PM   #17
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Quote:
Originally Posted by happy View Post
Last trip a couple things got moved from pots and pans to the bed as we drove. Towel was placed under the glass in the microwave.
Sounds like a friend of mine that bought a travel trailer, first time out and a bottle of ketchup blew-up. The inside looked like a horror scene from "Friday the 13th". What a mess...but I couldn't stop laughing. Him and his wife didn't think it was so funny, which made it even funnier!!

I didn't think of the microwave...and we have that glass disc that spins...good idea!!
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Old 09-26-2022, 01:30 PM   #18
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THOR #3923
I have been searching online for which is better Dynamat or B-quiet. For what it's worth, I found this online.

Out of Dynamat Extreme and B-quiet, dE is a much better product

The adhesive is designed to be used in a car (not on a roof like b-quiet, which is roofing tape resold as a vibration damper)

The foil on DE is twice as thick as the foil on BQ, which is a huge benifit. HUGE!

4 mil foil compared to 2 mil foil is going to do a much better job damping.

Dynamat extreme is better in every way, except price.
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Old 09-26-2022, 02:17 PM   #19
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I found this very informative...compares the different sound deadening material.

https://soundproofguide.com/fatmat-v...co-vs-dynamat/
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Old 09-26-2022, 02:26 PM   #20
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THOR #19887
Quote:
Originally Posted by Jusplainwacky View Post
I'd like to know what people have done to decrease the sound inside the coach.
My MH is pretty quiet ref. inside noise but outside noise (wind and road noise) and heat from the road and the cat. converter where bothering me so last year I installed the below sound deadening in the front wheel wells and under the floor all the way back to the cat converter.
It really reduced the road noise and the heat from the floor was eliminated.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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