LR4 Floor Sound Deadening and Heat Insulation

[Land Rover Joe]

Tribe,

New question and thread here - Does anyone have any experience in sound deadening and thermal insulating their interior flooring?

This job requires pulling the seats out and pulling the carpet up to get underneath all that and see the flooring (to include footwells).

Here are a few resources related to this job -

2nd Row Middle Seat Removal

Hi all, New to this forum. Recently bought my wife a lightly used 2015 LR4 Lux. We have three kids, 6, 4 and 2. The two oldest like to sit in the 3rd row and we have the 2 yo behind my wife in the second row. We started out with the middle seat folded down and the kids would just climb over...

www.landroverworld.org

Any insights would be most welcome!

 

[powershift]

In that last vid that engine sounded like it had chain slap. I haven't worked on the floor, but had thoughts of tearing out the seat cushions on the 3rd row and mount Lifepo4 cells in its place.

 

[Land Rover Joe]

In that last vid that engine sounded like it had chain slap. I haven't worked on the floor, but had thoughts of tearing out the seat cushions on the 3rd row and mount Lifepo4 cells in its place.

The third floor seats do seem like a waste of space.

I often forget they are even there.

On the other hand...there have been a few, rare, times I needed more seats in the back and they were really helpful (carting around 6 people in addition to myself!) But if you do put them up - then there is absolutely zero trunk space.

So there is a need for those seats - yet for off-roading purposes one could use that room for a lot more things.

@powershift - let us know if you have any projects where you pull those seats out and use that space for something!

 

[Land Rover Joe]

Tribe,

So over the weekend we did some Sound Deadening and Heat Insulation in my LR4 floor (to include footwells and second row seating).

Here is what I used, purchased from Amazon:

Dynamat Xtreme Tech Pack Sound Deadening Car Insulation – Noise Dampening for Floor, Doors, Panels, Hood, Engine or Trunk – Easy Self Adhesive Install – Made in USA – 7 Sheets, 18”x32”, 28 sq ft total

Siless Liner 157 mil (4 mm) 51 sqft Car Sound Deadening Closed Cell Foam & Heat Insulation mat - PE Foam Sound Deadener Material & Heat Barrier

This job used up most of that insulation and foam…so doing the front end of the cabin would require about all that.

Here are some photos of the job -

 

[Land Rover Joe]

What the floor looks like, after pulling everything out - notice that there is no corrosion on the original body. However, there is corrosion on the black bits...which are the mounting points for the seats. We are cleaning and painting up all those parts -

 

[Land Rover Joe]

Here are the photographs after we applied the first layer - the Dynamat Extreme -

 

[Land Rover Joe]

After the Dynamat, we applied the Silless foam (in this case, tan color) -

 

[Land Rover Joe]

Here is a photograph which shows the carpet in the footwell area after we did the application.

Notice the heavy molded foam under the carpet layer (under several other layers): this is one good reason why the OEM does such a good job quieting the road and engine noise down in the cabin (and helps waterproof the carpet layer underneath). I didn't realize how heavy everything was and how carefully manufactured these carpet panels were. The one for the front footwells is actually one large, continuous carpet with many layers including these molded to fit foam layers (which covers over the transmission and exhaust in the center of the truck and is under the dashboard moldings).

We will see if my sound deadening and heat insulation experiment adds anything to the front of the cabin and improves things...or just causes problems with the factory carpet (or does nothing). Noteworthy is that the center of the truck (where the shifter is located) does get really hot in hot weather and with heavy use.

Time will tell and I would say that if you are keeping the factory carpeting, and it is in good condition (like mine), then you probably won't need as much deadening in the front of the LR4 as what I just installed.

Another note: This carpeting design also makes it really hard to remove and clean. In our case, we just cleaned the entire front carpet panel in situ in the front with foam carpet cleaner (but pulled the entire rear / second row seating carpet). Pulling it out would be more work and then pressure washing it would probably require several days to dry.

Finally - the seat mounting points have to be left alone in order to get all that to fit back onto the mounting surfaces.

 

[powershift]

Its pretty quiet in my rig, I don't hear much road noise. Slight engine noise and that's it but with those additions I'd expect a lower sound floor on the highway and probably better sounding audio.