I started a new project. To make my Georgetown quieter when I'm driving it. I took some sounds measurements at several speeds on a recent trip so hopefully I can get an idea of how well it worked. Sound measurements where taken on level ground at a constant speed on a calm day. I even know where I was so I can go back to that same spot since different types of pavements are louder or quieter.
After doing lots of reading around the various forums I decided to use B-Quiet brand of sound proofing. Since it had better specs and is cheaper than most of the others. It comes from Canada so it did take some time to get here. B-Quiet sound deadening material
The plan is to cover the whole under side of the coach from the door forward. With two layers of B-Quiet Ultimate and one layer of B-Quiet V-Comp.
Installation goes like this:
- Spray area with water from garden hose to get off dust and loose dirt. Let dry.
- Scrape foam insulation off where Forest River blew it on in certain spots. Most of what is scraped off is over spray.
- Clean with 409 cleaner and lots of rags to get road grime and grease off.
- Apply one layer of self stick B-Quiet Ultimate, trim with utility knife and roll with hard roller.
- Apply second layer of B-Quiet 90 degrees off-set to the first. More trimming and more rolling
- Trim and dry fit B-Quiet V-comp.
- Spray area and V-comp with 3M Hi-Stength 90 Spray Adhesive.
- Wait for both sides to get tacky and then stick it up.
- More trimming and rolling.
It's exhausting. I got the dog house cover done a few days ago. Today I did the whole space between the door and drivers side about 25" wide. And I did a small triangle section right next the doghouse cover.
Pictures below. Before, during and after. The bolts you can see sticking down are the four bolts that hold down the chair behind the passenger seat.