Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
 
Old 05-22-2020, 03:57 PM   #1
Mini-Skoolie
 
Join Date: Nov 2018
Posts: 11
Year: 2007
Coachwork: Midbus
Chassis: Chevy 6 Window
Engine: 6.6L DURAMAX LMM
Sub Floor Framing Question

Laying down 80 mil butyl and foil thermo-acoustic sound dampener over the sheet metal on the floor. I was originally thinking of laying down the sub-floor framing directly on top of the finished sheet metal with adhesive and screws and then place the sound mat in between the framing



I've had a thought now, though, that it might be better to lay the sound mat down over the entirety of the floor and then build the sub-floor on top of it.


Would there be any significant gain in sound/heat dampening from this extra step?


Would there be any problems with the structure of the sub-floor built on top of the sound mat versus directly onto the floor?


I'll be using spray foam insulation throughout the bus if that information is relevant.

dog_and_ape is offline   Reply With Quote
Old 05-22-2020, 04:49 PM   #2
Bus Geek
 
musigenesis's Avatar
 
Join Date: Jan 2019
Location: Philadelphia
Posts: 5,389
Year: 2003
Coachwork: International
Chassis: CE 300
Engine: DT466e
Rated Cap: 65C-43A
Quote:
Originally Posted by dog_and_ape View Post
Laying down 80 mil butyl and foil thermo-acoustic sound dampener over the sheet metal on the floor. I was originally thinking of laying down the sub-floor framing directly on top of the finished sheet metal with adhesive and screws and then place the sound mat in between the framing



I've had a thought now, though, that it might be better to lay the sound mat down over the entirety of the floor and then build the sub-floor on top of it.


Would there be any significant gain in sound/heat dampening from this extra step?


Would there be any problems with the structure of the sub-floor built on top of the sound mat versus directly onto the floor?


I'll be using spray foam insulation throughout the bus if that information is relevant.
What's the PSI rating for the sound mat?
__________________
Rusty 87 build thread
musigenesis is online now   Reply With Quote
Old 05-22-2020, 06:14 PM   #3
Bus Crazy
 
Join Date: Sep 2018
Posts: 2,061
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
I searched format and came across several brands. I don’t think I see what this will accomplish on the floor. It might knock down vibrational noise on a bare sheet metal floor, but I think that the addition of foam insulation, wood frame and plywood screwed to the floor kind of makes that stuff moot.
Danjo is online now   Reply With Quote
Old 05-23-2020, 12:17 PM   #4
Bus Crazy
 
TheHubbardBus's Avatar
 
Join Date: Apr 2019
Posts: 1,063
Our tentative plan is to spray foam the entire interior, floor included.

Not only will it cost exactly the same as if we just did walls & ceiling (company we've chosen has a minimum square foot limit we're under even w/ the floor included), it should also provide significant sound deadening & it serves as its own vapor barrier.
If we weren't foaming the roof & walls, it might not be so cut & dried. But since we are, doing the floor at the same time seems to be a no-brainer. Nothing compares in the ability to kill so many birds (thermal/sound/vapor) with a single stone.
__________________

TheHubbardBus is offline   Reply With Quote
Old 06-04-2020, 12:31 PM   #5
Bus Nut
 
wrenchtech's Avatar
 
Join Date: May 2019
Location: Lake Geneva, Wisconsin
Posts: 401
Year: 2008
Coachwork: Thomas
Chassis: Saf-T-Liner HDX
Engine: CAT C7 300hp w/retarder
Rated Cap: 46 + 1 36,200 lbs
Quote:
Originally Posted by TheHubbardBus View Post
...Nothing compares in the ability to kill so many birds (thermal/sound/vapor) with a single stone.
Makes a lot of sense to me.
wrenchtech is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:36 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.