Jayco 26Y Cab Sound & Heat Reduction

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I know that there are many posts on the subject of sound and heat abatement on the Jayco forum because I used them as references for this project.

Thanks to all that have done this before me and shared the way...
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We will soon be going on a trip and fully evaluating this upgrade.
I did not have a "before" sound measurement but on our test drive, I measured a 50-60db level in normal driving and a 70db level going up steep UTAH hills.
My visceral conclusion is that the noise is dramatically reduced. Our Cadillac measures in the 50-67db on the same road.
During this test drive, there was no noticeable heat radiating from the floor.

I did not insulate the doghouse. The materials had warnings not to use them outside so I held off. Since then I know of one RVer that put the Killomat under the stock insulation, I may do that later.

I had plenty of material left over. Then again I planned for but did not do the doghouse.

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I did struggle to decide on which of the many recommended materials to use and where.

========The list of what materials I used===============

Floor 1st layer: https://amzn.to/32R2CHw

Floor top layer: https://amzn.to/3aGdFaA

==========List of tools used=============

For seat bolts:

• T55 1/2" drive Torx bit: I bought a full set at HF. Here is a single: https://amzn.to/3vk1VT5
• 18mm 1/2" socket

For material installation:

• Sharp utility knife
• Roller: https://amzn.to/3esFsMS

For panel release:

Trim removal tools:

• https://amzn.to/3xsmoqE

==========Outline of installation =====================

Remove seats:

• There are two rear 18mm nuts and 2 forward T55 torxs
• Unplug cables connecting seats. These cables have a locking tab that you release to unplug them. If they won't unplug then don't force you have not unlocked it.

Remove doghouse:

• Pull outward on locking tabs on the bottom and upper sides of the house. Then you can pull back and remove the house from the cab.
• You may have to remove the panel under the steering wheel first.
• To remove pull the panel briskly outward. (be prepared for a bundle of wires to droop down, I tied mine up as best I could)

First on the passenger side and then repeat on the driver side:

Remove the side kick panels & covering:

• Each side has a kick panel on the outer wall. I removed and insulated the inside of them.
• On the doghouse sides, I pulled the covering material outward and applied the sound deadening/heat materials under it. I did not remove it from the wall.

Remove the step trim:

• Remove the large black trim section that covers the step and overlaps the mat. This section can be removed by releasing the clips. It's best to use a trim removal tool to keep from breaking the clips.

Existing rubber mat:

• Don't remove the mat from the vehicle but rather lift 1/2 of the rubber mat at a time. I left the insulation that was attached to the underside of the mat and the few places it was on the floor and laid material over it.

Apply the Killomat first and then the Noico red.

• The materials form easily to the floor but once you lay them down they cannot be easily moved.
• Ensure that there are no gaps between the individual pieces as you fit them.
• I laid the section on the floor and used a marker to mark the shape. You can also form the shape by pressing it around areas you want to cut away.
• Before laying down the material note where holes for fasteners, clips, and cables need to connect. I used the blunt end of a marker to press a mark in the material while fitting and before removing the backing. This showed me where to cut out the holes after applying the material.
• Release the backing from the edge of the cut material and stick the exposed edge in place. Then with one hand roll the backing off under the section as you press it into the surface with the other hand.
• After laying the material down use the roller to ensure good adhesion. Be easier on the Noico material as it can shred if you abrade it too much.
• I also ran material down the side of the floor into the step gulch.

After laying down both materials roll the mat back over the floor fitting it around the seat bolts and cable holes.

Replace the side and step panels. Be careful that the clips are aligned with their hole and do not force them. When they are aligned they will lockin easily.

Repeat the above on the driver's side.

Finally,

• Replace and install the doghouse
• Replace the panel under the steering wheel. I found that after tie wrapping everything except the camera cables and controller, the easiest way to get the panel on was:
  • Leave the camera control and wiring hanging out of the gap in the upper middle of the panel. Then lift and press the panel upward and into its clip holes. After the panel is clipped into place then push the camera controller and cables into the gap in the middle of the panel and into space under the steering wheel.
• Put the seat in position but before bolting it in connect the seat wiring.
• Bolt in the seats insuring that the front bolts and rear nuts are tight. They will feel "soft" as you tighten them as the new floor compresses.

Photos