Reply
 
Thread Tools Display Modes
 
Old 08-18-2017, 12:16 PM   #1
New Member
 
Merideth Story's Avatar
 
Join Date: Mar 2017
Location: Massachusetts
Posts: 5
Year: 00'
Coachwork: Thomas
Chassis: GMC Savana
Engine: GMC Savana 3500 V-8 MPI
Waterproofing roof and ceiling

Hello everyone! Thanks for popping in. I am wondering what may be a good approach to water proofing my roof outside and the ceiling inside.
I am going to be putting a roof deck on top of Meri so, there will be holes for the mounting hardware that are going to to be fastened into the steel ribs of the roof.
Before I deck it however, I want to coat both the roof outside and the ceiling inside for 100% water proofing.

Anyone?
Attached Images
File Type: jpg 20170818_120241.jpg (447.3 KB, 19 views)
Merideth Story is offline   Reply With Quote
Old 08-18-2017, 12:21 PM   #2
Mini-Skoolie
 
LPST's Avatar
 
Join Date: Jul 2017
Location: California at the moment
Posts: 57
Year: 1992
Coachwork: Eldorado National
Chassis: ESCORT RE
Engine: Cummins B5.9
Rated Cap: 32
I would suggest using 3M 5200 to seal anything bolted to the roof, it's a waterproof glue used in boat building, although it's great it can sometimes be impossible to remove so keep that in mind as well, just drill your hole put a ring of 5200 around it when you bolt it down don't tighten it all the way just enough to seal it tight then let it set up for about 12 hr then tighten it down. the rest of the roof can be sealed with any rv roof sealer coat(the thick rubbery white paint).
__________________
Trust in the Lord with all thine heart; and lean not unto thine own understanding. Proverbs 3:5

In all thy ways acknowledge him, and he shall direct thy paths. Proverbs 3:6
LPST is offline   Reply With Quote
Old 08-18-2017, 12:38 PM   #3
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 22,292
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
I'd use 3m seam sealer, and then I'd paint it flat white with regular old rustoleum. It'll look good, be sealed, and won't peel, yellow, or have dirt stick to it. Flat white will also do the best job of reflecting the sun's heat away.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 08-18-2017, 01:11 PM   #4
New Member
 
Merideth Story's Avatar
 
Join Date: Mar 2017
Location: Massachusetts
Posts: 5
Year: 00'
Coachwork: Thomas
Chassis: GMC Savana
Engine: GMC Savana 3500 V-8 MPI
water proofing membrane for interior?

Thank you for the exterior advice!



Is Red Guard a suitable product for the ceiling inside?

I'm a contractor and have used it before for tile installs.

Custom Building Products RedGard 1 Gal. Waterproofing and Crack Prevention Membrane-LQWAF1 - The Home Depot
Merideth Story is offline   Reply With Quote
Old 08-18-2017, 01:30 PM   #5
New Member
 
Merideth Story's Avatar
 
Join Date: Mar 2017
Location: Massachusetts
Posts: 5
Year: 00'
Coachwork: Thomas
Chassis: GMC Savana
Engine: GMC Savana 3500 V-8 MPI
I already painted the outside of the roof with alumicoat. I'm wondering if I should strip that and apply something else.

Also wondering if Red Guard waterproofing membrane is a good choice of product for the inside ceiling before I insulate.
Custom Building Products RedGard 1 Gal. Waterproofing and Crack Prevention Membrane-LQWAF1 - The Home Depot


Any thoughts?
Merideth Story is offline   Reply With Quote
Old 08-18-2017, 02:10 PM   #6
New Member
 
Merideth Story's Avatar
 
Join Date: Mar 2017
Location: Massachusetts
Posts: 5
Year: 00'
Coachwork: Thomas
Chassis: GMC Savana
Engine: GMC Savana 3500 V-8 MPI
How about waterproffing the inside ceiling?

Is Red Guard waterproofing membrane a good choice?
Merideth Story is offline   Reply With Quote
Old 08-18-2017, 02:22 PM   #7
Mini-Skoolie
 
LPST's Avatar
 
Join Date: Jul 2017
Location: California at the moment
Posts: 57
Year: 1992
Coachwork: Eldorado National
Chassis: ESCORT RE
Engine: Cummins B5.9
Rated Cap: 32
Quote:
Originally Posted by Merideth Story View Post
How about waterproffing the inside ceiling?

Is Red Guard waterproofing membrane a good choice?
as long as the roof is water tight from above I see no reason to seal it on the inside, what do you plan to do with the bus? I have no first hand experience with red guard so ill leave that to others, the website says its pink and not paintable. IMHO I wouldn't seal it from the inside without first sealing the outside otherwise what ever goes through the outside will be trapped in the layers from the inside seal and could cause more problems.
__________________
Trust in the Lord with all thine heart; and lean not unto thine own understanding. Proverbs 3:5

In all thy ways acknowledge him, and he shall direct thy paths. Proverbs 3:6
LPST is offline   Reply With Quote
Old 08-18-2017, 02:32 PM   #8
Mini-Skoolie
 
LPST's Avatar
 
Join Date: Jul 2017
Location: California at the moment
Posts: 57
Year: 1992
Coachwork: Eldorado National
Chassis: ESCORT RE
Engine: Cummins B5.9
Rated Cap: 32
I have used this stuff https://www.epdmcoatings.com/liquid-roof.php on my trailers, and RV's with good results. It isnt the cheap way to go but lasts for years in the hot california sun
__________________
Trust in the Lord with all thine heart; and lean not unto thine own understanding. Proverbs 3:5

In all thy ways acknowledge him, and he shall direct thy paths. Proverbs 3:6
LPST is offline   Reply With Quote
Old 08-18-2017, 03:57 PM   #9
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 22,292
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by Merideth Story View Post
How about waterproffing the inside ceiling?

Is Red Guard waterproofing membrane a good choice?
If you need to waterproof your inside ceiling something is seriously amiss.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Old 08-18-2017, 05:50 PM   #10
Bus Nut
 
Join Date: Mar 2017
Location: iowa
Posts: 397
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: formerly 71 now 2 or 4
Quote:
Originally Posted by EastCoastCB View Post
If you need to waterproof your inside ceiling something is seriously amiss.
im thinking indoor water fights here
mmoore6856 is offline   Reply With Quote
Old 08-18-2017, 08:27 PM   #11
Bus Crazy
 
Stu & Filo. T's Avatar
 
Join Date: Sep 2013
Location: Vacaville, Ca
Posts: 1,624
Year: 1988
Coachwork: Crown / Pusher
Engine: 8.3 Cummins
There's this stuff, but it is pricey, When I called them it was $100.00 a ft

Welcome to RV Armor - Home
Stu & Filo. T is offline   Reply With Quote
Old 08-18-2017, 08:54 PM   #12
Bus Geek
 
Join Date: May 2009
Location: Columbus Ohio
Posts: 13,122
Year: 1991
Coachwork: Carpenter
Chassis: International 3800
Engine: DTA360 / MT643
Rated Cap: 7 Row Handicap
Quote:
Originally Posted by mmoore6856 View Post
im thinking indoor water fights here
forget water fights.. Lazer tag is more fun!
cadillackid is offline   Reply With Quote
Old 08-18-2017, 09:38 PM   #13
Bus Nut
 
oricha1984's Avatar
 
Join Date: Jul 2016
Location: Central Florida
Posts: 897
Chassis: GMC or Chevrolet, I hope
Engine: gasser probably
Quote:
Originally Posted by EastCoastCB View Post
If you need to waterproof your inside ceiling something is seriously amiss.
waterproofing from inside
makes no sense as all.
__________________
the more i learn, the less I know what to buy . . .
oricha1984 is offline   Reply With Quote
Old 08-18-2017, 10:06 PM   #14
Bus Nut
 
Join Date: Mar 2017
Location: iowa
Posts: 397
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: formerly 71 now 2 or 4
Could be one hell of a party in there
mmoore6856 is offline   Reply With Quote
Old 08-19-2017, 12:03 PM   #15
Bus Geek
 
Tango's Avatar
 
Join Date: Mar 2011
Location: Houston, Texas
Posts: 8,462
Year: 1946
Coachwork: Chevrolet/Wayne
Chassis: 1- 1/2 ton
Engine: Cummins 4BT
Rated Cap: 15
I'm with ECCB...clean all the existing outside seams and reseal with OEM grade automotive seam sealer. Then coat the whole roof with a good grade white elastomeric.

Forget the inside unless you are building a mobile aquarium and need to keep water in.
Tango is offline   Reply With Quote
Old 08-19-2017, 01:16 PM   #16
Bus Nut
 
Join Date: Mar 2017
Location: iowa
Posts: 397
Year: 1998
Coachwork: bluebird
Chassis: chevy
Engine: 3116 catapillar
Rated Cap: formerly 71 now 2 or 4
What about humidity is that thier concern?
mmoore6856 is offline   Reply With Quote
Old 08-19-2017, 07:58 PM   #17
Bus Geek
 
EastCoastCB's Avatar
 
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 22,292
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
Quote:
Originally Posted by mmoore6856 View Post
What about humidity is that thier concern?
Would only make it worse.
__________________
.
Roll Your Own Build Thread
EastCoastCB is offline   Reply With Quote
Reply

Tags
roof, roof deck, roof rack, waterproofing

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 11:59 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×