Sound deadening a 2019 Double Cab

materials used:
- Noico 80 mil butyl mat, 36 sq ft box
- Noico 150 mil Red closed cell foam, 36 sq foot box

This project started with wanting more tool storage space behind the rear seats. Based on other posts here on TW, I decided to remove the factory storage bins which are integrated into the back can wall panels. These do not make very efficient use of all the space available. Reading about this process here on TW, I decided to also do some sound treatment on the back wall at the same time since removing the panels exposed that area anyway. One thought led to another and reading posts here, so I ordered enough mat and foam to cover the back wall, back floor under the seat, and the area inside the storage compartment that’s under the back seat. The back panels come out easily (6 10 mm hex head screws and a few plastic inserted tab things that pull out), as does a layer of cheesy lint-based insulation (6 plastic inserted tab things that pull out), as does the under seat storage (9 plastic inserted tab things that come out using a small flat screwdriver for leverage) . Back seat removed easily also (6 12 mm bolts for the seat itself, and 2 14?mm larger bolts for the seat belts). I strongly recommend a helper to lift the seat out and get it back in. Once the seat’s out, you’ve got clear space to cover, mat first then foam. For adhering the mat, I used a vinyl flooring seam roller instead of the Noico roller, worked fine. My truck has the power back window so had to be careful, avoiding mat/foam contact that might cause its cable to stick. Other than that, pretty straightforward. I decided to go with a double layer of mat in the areas with the most need for deadening (center of back wall, cross beam on back wall, and under the seat). Single layer of foam everywhere. In total, I think I used about 2/3 of the mat and 1/2 of the foam. Results/next steps after putting everything back together:
- with seats down, sound level during test drive is a little better than before (will need to install some sort of back wall panel over the mat/foam next. I’m thinking thin carpet with mass loaded vinyl glued on).
- with seats up, much quieter than before. The added back panel should improve this even more.
- now that I’ve got more room for storage, I can get back to the original purpose of this whole adventure: more storage, I’ll probably build 2 stacking tool trays or look for a slender toolbox (needs to be 7” or less front to back).

 

You have any pics of how much more room there is now?

 

pics would be cool

 

Sure, I’ll get pics and post tomorrow of the expanded space. What I can say at this point is it’s a clear space with relatively flat bottom, 48” across, and 7” front to back.

 

OK here's a couple pictures with original panels removed and mat/foam applied. One is from above the passenger side, the other is from the rear driver door.
Dimensions of interest:
Total usable width left to right ignoring seatposts: ~54"
Widths between seatposts:
- Driver side: 21"
- Passenger side: 32"
Front-to-back: 7"
Height from floor to level with folded-down seatback: 5.5"

 

That does have a bit more space. I might have to consider this. My recover gear is overflowing

 

Did you just go right over the vents in the back wall?

 

No, I did not cover those parts of the wall with mat. Not shown in the pictures are slots I cut in the foam to allow air flow. Decided air flow was more important than more quiet

 

I did all four doors, inner and outter shells and made a little more thump in my bass

 

These are my results.
I decided to keep the rear hanging cotton/vinyl cover.

 

anyone take a DB meter before and after measurements?

 

Auskip07, alas, no. Didn’t think of it.

 

How much and how long did it take you? Was it a difficult project?

 

Good job!
I only did the outermost layer of metal on my truck.

 

Adding a layer of mass loaded vinyl over that foam will do much more to kill road noise than the 2 layers you've already installed. The butyl stuff is to kill rattles and vibrations, the foam doesnt block much noise at all but can absorb some rattling, mass is what kills noise. Some use lead sheets, but mass loaded vinyl is much cheaper and easier to work with.

 

To be honest, there us still alot of noise coming through the windows but there is a noticable difference from road noise and it gives the bass a little more thump

 

Planning to upgrade the stereo? I went the OEM audio plus route and i am very happy with it

This summer i did sound deadening in my truck. CLD tiles, foam, and MLV. If you really want to block outside road noise you will need a layer of MLV.

I did do a decibel measurement before and after sound deadening and went from 84-85 down to 70-71.

The tone of the noise changed where i hear more wind noise through the glass now heading down the highway.

Its alot of work but its worth it when commuting 2 hours a day

 

Adding to the above:
...if you would like to know more, then here’s a good site https://www.secondskinaudio.com/

 

I have the same, save the MLV...prolly going to have to add it soon...70-71 is nice.

 

The sound deadening info is great. I'm now looking forward to the tool/stuff storage part. What are you planning to store that you couldn't before? And how will you utilize the greater vertical volume above the floorboard now that you've removed the factory plastic?