Sound Proofing/Deadening

Discussion in 'Interior Modifications' started by novanutcase, Apr 23, 2017.

  1. novanutcase

    novanutcase FEOA Member

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    So I got a second to do a little work on the wagon and decided I'd start the stereo installation that I've been meaning to get to but first I had to do some preliminary work to get ready for it. I took off the door panel to see how I could get the coaxial speaker I bought to fit since it didn't fit in the stock speaker hole in the subframe of the door.

    Once I figured out how I'd mount the door speaker I went to work sound proofing and deadening the door at hand. I bought some peel and stick from Home Depot and cut 12" x 12" pieces and stuck a couple on the inside of the outer skin to reduce wind and outside noise vibrations. I was pretty impressed with the sound difference. It definitely has less resonance. I stuck a double patch right behind the speaker hole to kill whatever sound coming out the back of the speaker. I had removed the vapor barrier and proceeded to mount the peel and stick on making sure to cut holes for the door lock rod, speaker and wire loom for the power windows.

    After I finished sealing the inner frame of the door I proceeded to put it all back together. I had to lengthen the wires for the speakers so that I could take the door panel off and have enough length to be able to unplug the wires since I mounted the speaker to the backside of the door panel. I wasn't sure the speaker would leave enough room to get the door panel clips to stay on since the cage of the speaker was larger than the stock speaker mount hole and stuck out around a 1/2" but the door panel has around 3/8" gap between the door subframe and the back of the door panel itself so, thankfully, the clips held.

    As soon as I had it all together I tested the difference by opening and closing the door. Big difference. Now the door makes a satisfying thud rather than an annoying clang. Instead of having to hear the window and door lock mechanisms the door is very quiet. The Alpine speaker I bought for the car worked perfect. The tweeter really gives the music a nice definition that the stock speakers only dreamed they could. I can't wait to get some time to finish the other three. Even with the shitty stock radio it sounds better. After I get all the speakers installed I'll move onto the head unit installation.

    Once I finish the doors I'm going to move onto installing the new carpet I got from ACC for a killer deal. I think I'm going to line the floor with this stuff as it's cheap and works great. I'll lay a layer of the peel and stick along with an undercarpet pad and then the carpet itself. The sticky part isn't as good as Dynamat or Fatmat but the little wooden roller did a great job at getting the product to stick to the surface. I also made sure the surface was clean by wiping it down with a wet rag to clean off the dust that accumulates on the inside of the outer door skin then went back over with some rubbing alcohol to get whatever remaining grease or dirt might still be on there. I did the same to the subframe although if it doesn't stick as well it's OK as the door panel will keep it in place.

    John
    Last edited: May 5, 2017
  2. neuspeedescort

    neuspeedescort FEOA Member

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    i just deadened a 2016 focus RS. it was a real joy!
  3. Pizzaman5000

    Pizzaman5000 FEOA Donator

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    What's the mounting depth of these speakers?
  4. novanutcase

    novanutcase FEOA Member

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    2 3/8". Depth isn't the problem so much as the width. The hole in the subframe of the door is too small and hits the cage of the speaker. I was thinking of cutting the hole out to fit the speaker but I decided I'd rather not cut into the subframe of the door so I figured out a different way to mount it.

    John
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  5. Pizzaman5000

    Pizzaman5000 FEOA Donator

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    OK, just making sure you tried rolling the window down all the way. I totally forget the depths offhand, but had to use my third choice in speaker... But I'm due for new ones that fit.
  6. novanutcase

    novanutcase FEOA Member

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    No window obstruction. Even with having done just the two front doors I can hear things that get masked in the road noise. Little rattles and stuff that are much easier to track down since it's easier to locate the sound now that it's quieter in the car.

    I just got done covering the rear cargo area up to the rear seat back . Took me two rolls. That includes covering the shock towers and the subframe behind the wheel well up to the hatch opening. I'm taking the opportunity to change the color of the trim now that it's off the car. Trying to finalize rear cargo area floor design.

    John
    Last edited: May 4, 2017
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  7. dchawk81

    dchawk81 FEOA Member

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    Be careful. Too much deadening and you won't hear the valve seat drop.
  8. novanutcase

    novanutcase FEOA Member

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    LOL! Easy Brother! Don't wanna jinx it.

    John
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  9. novanutcase

    novanutcase FEOA Member

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    While adding the deadening material to the cargo area, as I had posted previous, I also did a color change and because I had to remove the trim to be able to apply the deadening material to the cargo area I took the opportunity that the trim was out and painted it. One of the things I like to do after painting plastic trim is to really let it dry well. I've found that the paint tends to stick better and is more scratch resistant. I have a metal utility shack in my backyard that heats up like an oven on hot days so after painting the trim I left it in the shack for a couple days to get good and dry.

    I went ahead and installed the newly painted trim, threw the old cargo area carpet back in along with the stock wooden spare cover(I'll be addressing that soon!) and took her for a drive to see if there were any noticeable improvements.

    What a difference. Even my GF mentioned how much quieter the car was. Of course, being a woman, she bitched and complained while I was doing the installation that I was spending time needlessly on the car since what I was doing wasn't going to make a difference and I should be spending the time and money I spent on this project on her! After the test drive she said I should do the whole car so that she could talk to her friends on the cell phone and not have to yell into the phone! Women. Go figure.

    Next step is the two rear doors. After that I'm going to take a break, save up more money and buy some vinyl to recover the seats. Once I have the seats out to reupholster I'll go ahead and remove the old carpet and replace with the new carpet. That's when I'm going to install the deadener to the floor. I can see that it is going to make quite a difference once I'm all done. Maybe not Lexus or Mercedes quiet but close enough!!!

    So far I've used 3 rolls of the peel and stick. 1 roll was able to cover both front doors and the rear cargo area required 2 rolls. I'm estimating that the 2 rear doors will require 1 roll and the remaining floor pan will require another 2 rolls. The roof will require 3 to 4 rolls so 10 rolls should be sufficient to cover the entire car. At $15 a roll that would bring the total for deadening to around $150. If you add in the cost of the little wooden roller($7) and tax along with whatever little miscellaneous BS that always seems to pop up you're probably looking at around $200 to do this project.

    Is it worth it? Definitely. The new stereo I'm installing will definitely sound better without all the road and wind noise messing up the sound. It makes the car more enjoyable to drive too!

    John
    Last edited: May 5, 2017
  10. chrselmore

    chrselmore FEOA Member

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    Where are the pics???
  11. novanutcase

    novanutcase FEOA Member

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    Sorry! Between the cursing and rolling out the deadener I forgot to snap a pic. I'll snap a pic when I do the rear doors.

    John
  12. novanutcase

    novanutcase FEOA Member

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    DAMMIT! In my haste to get the car back together I painted the door panel and didn't shake the can sufficiently and the paint came out tacky and wouldn't dry. I had to strip it all off and will have to paint it again!:mad::(:arghh::rolleyes:

    John
  13. dchawk81

    dchawk81 FEOA Member

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    Yuck.

    Pics or it didn't happen.
  14. novanutcase

    novanutcase FEOA Member

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    Yeah. It was messy as hell trying to get it all off. I went through a bag of rags and a quart of paint thinner to get it all off. Even with that my gloves were covered in paint.

    John
  15. dchawk81

    dchawk81 FEOA Member

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    Gloves? Sissy.
  16. novanutcase

    novanutcase FEOA Member

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    Hahaha!

    John
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