Removing seat and floor liner to add floor sound deadening

[Finpro807]

I have a 2023 Integra Aspec (non-tech). I'm thinking about stripping my interior down so I can apply sound deadening material (Dynamat, Sound Skins, etc.) to the metal floor. It's just been too much road noise and NVH especially at highway speed or going through broken pavement. I was doing some research and people said the Integra didn't really have any sound insulation on the floor from the factory, and that adding floor insulation could seriously reduce road noise and NVH... Does anybody know if that's true? I went to a stero store and the guy quoted me $1600 for parts and labor (they used SoundSkin). It's a bit steep for me so I'm thinking maybe buy the material online and DIY.

Has anybody done project like this and can give me some input on your approach? Anybody knows how to remove seats (front and back), floor liner, and anything else I might've missed so I can access the metal floor frame? Is this a DIY friendly project or more of a pro only project? I'd classify myself as a handy person but nowhere near mechanic level. I'm also concerned about putting everything back correctly so I don't add more squeak and creak that Inetgra is already prone to.

Any input would be greatly appreciated, thanks!

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[NoelPR]

Got a better idea.
Just turn the music level up and save the money.

 

[Westhaver]

(1) Sound Deadening Project | CivicXI - 11th Gen Civic Type R (FL5), Hybrid, Si Forum, News, Owners, Discussions

 

[Finpro807]

(1) Sound Deadening Project | CivicXI - 11th Gen Civic Type R (FL5), Hybrid, Si Forum, News, Owners, Discussions

Thanks a lot! Such a great thread to read it's almost addicting. Definitely motivated me to start this project myself, just need to know how to remove the back seat first.

 

[Westhaver]

Good luck. I think the backseat is pretty straightforward, should be the same as the Civic.

 

[Integra23]

Back seat is very easy. Removing bottom portion only has a single bolt that needs to be removed, driver side above the cushion. Then 2 plastic clips under the seat that you push the seat down then squeeze clip and lift.

 

[Finpro807]

Back seat is very easy. Removing bottom portion only has a single bolt that needs to be removed, driver side above the cushion. Then 2 plastic clips under the seat that you push the seat down then squeeze clip and lift.

Thank you! Would I need to remove the backrest portion too to have full access to the floor?

 

[Integra23]

Thank you! Would I need to remove the backrest portion too to have full access to the floor?

That's has a few bolts hidden under side flaps when folded flat. Depends how serious you are but it would allow easier access.

 

[Finpro807]

Does anybody know how to remove the carpet to access the driver and passenger footwell metal frame? Preferably without having to remove the seats.

 

[Frenzal]

Don't think you can remove the carpet without removing the seats.

Had to remove the seats in my 00 Civic to remove the carpet. Might be different in the Integra though.

 

[Victorofhavoc]

@Finpro807, have you done other parts of the car yet? There's not much/any insulation in the floor (in any car really) and the sheet metal isn't quite as thin there.

From what I've read from others, the best roi comes from trunk + rear wheel wells, doors, hatch, floor, firewall. In that order.

I haven't addressed mine yet, but plan to soon with some kilmat and aggfoam. On some crappier roads, my car can get LOUD at hwy speeds. All the noise sounds like it's coming from the rear. I started pulling up some of the hatch lower trim and it's pretty clear why it's so loud the moment you tap the metal back there. It's all thin and it all echoes.

 

[Finpro807]

@Finpro807, have you done other parts of the car yet? There's not much/any insulation in the floor (in any car really) and the sheet metal isn't quite as thin there.

From what I've read from others, the best roi comes from trunk + rear wheel wells, doors, hatch, floor, firewall. In that order.

I haven't addressed mine yet, but plan to soon with some kilmat and aggfoam. On some crappier roads, my car can get LOUD at hwy speeds. All the noise sounds like it's coming from the rear. I started pulling up some of the hatch lower trim and it's pretty clear why it's so loud the moment you tap the metal back there. It's all thin and it all echoes.

That's great insights! I added butyl mats (like kilmat) on my door a while back, it did help cut down NVH and outside noise while the car was at low speed, but not much help at highway speed. The biggest difference I felt after deadening the doors was when a car passed me on the road; it felt quieter and better insulated. Music also sounded better but only at low speed.

I completely agree with you with the noise (buzzing, echo-y, drony sound) coming from the rear. I'm getting pretty frustrated with it especially if I drove through poor pavements. I've always wanted to do the trunk but hadn't thought about sound deadening the hatch. Was it hard for you when you did it?

Just got more butyl mats and aggfoam delivered today and I'll probably start on the trunk and rear wheel wells (inside cabin) this weekend. Will be posting updates!

 

[Victorofhavoc]

That's great insights! I added butyl mats (like kilmat) on my door a while back, it did help cut down NVH and outside noise while the car was at low speed, but not much help at highway speed. The biggest difference I felt after deadening the doors was when a car passed me on the road; it felt quieter and better insulated. Music also sounded better but only at low speed.

I completely agree with you with the noise (buzzing, echo-y, drony sound) coming from the rear. I'm getting pretty frustrated with it especially if I drove through poor pavements. I've always wanted to do the trunk but hadn't thought about sound deadening the hatch. Was it hard for you when you did it?

Just got more butyl mats and aggfoam delivered today and I'll probably start on the trunk and rear wheel wells (inside cabin) this weekend. Will be posting updates!

I haven't done it yet. I just got a box of foam in yesterday actually.

I've taken apart most of the hatch for another project though. It's easier than it looks, and as you remove plastic the reason it's noisy becomes more apparent.

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