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Old 09-12-2015, 11:38 AM   #1
Mini-Skoolie
 
Join Date: Sep 2015
Location: oklahoma
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Year: 1997
Coachwork: International 3800
cover interior ceiling

Looking for advice on insulating and covering inside ceiling. Would like thin layer of an r type with something decorative. And does anyone recommend wiring lights in ceiling or off to side? Thanks
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Old 09-12-2015, 04:34 PM   #2
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Welcome.

Glad to have you here.

First step is dropping that metal ceiling and removing all that gross fiberglass insulation.

This is half the reason.
http://www.skoolie.net/forums/f10/in...nks-11210.html

The other half is the thermal transfer. The fiberglass that was used does almost nothing to stop the radiant heat from coming through.

Then depending on your intended use for the bus, next step can vary.

Best is to go read as many build threads as you can. That is where the real info and experience can be found.

Asking questions will only get you opinions, not real info.

Also be sure to post pics. We all love pics.

Nat
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Old 09-12-2015, 09:35 PM   #3
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Will do. And yes reading a lot and looking at pics as well. I see a lot of floor plan shots but not many pics in the trenches if you know what I mean. Lots of removing seat shots. I'll def keep looking
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Old 09-13-2015, 01:47 AM   #4
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Sort them by the ones that have 20 + pages.

Many loose their goals when the work gets hard / life kicks in.

Many never get passed seat removal.

Nat
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Old 09-13-2015, 07:48 AM   #5
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I still have to scrape, but I did pull the ceiling panels down. I wanted to see if there were any leaks up there, as well as be able to install vents without having to cut through the existing insulation.
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Old 09-22-2015, 08:52 PM   #6
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Here's a couple posts from my experience so far and how I approached it:

After roof raise, primed and sealed but no insulation:
http://www.skoolie.net/forums/f11/th...html#post93969

Bought a whole buncha foam (rigid polystyrene)
http://www.skoolie.net/forums/f11/th...html#post94115

Installed a whole buncha foam, of which the job seemed endless.
http://www.skoolie.net/forums/f11/th...html#post94364

Finished foam with another layer of foam, so silver mylar stuff faces inward and outwards.

http://www.skoolie.net/forums/f11/th...html#post95393

Skinned ceiling with the HDPE plastic sheeting stuff. It says right on the label not to use in RV applications. ;)

http://www.skoolie.net/forums/f11/th...tml#post104967

I have since discovered that it is sensitive to expansion so it can bulge slightly between the fastener points used. (I used self tapping or plastic rivets regularly spaced)

The material is functional, easy to clean, chemically resistant and waterproof.

I haven't gotten much further in the finishing department because we have impromptu started living in it while we sold our house and searched for another one. I'll soon start sheeting the vertical interior sides of the vehicle, and get to work on the partitions and inner walls.

plastex 48"x96" sheets, $20 each at lowes (and probably other places)

Shop Parkland Plastics Plas-Tex 48-in x 8-ft Embossed Plastic Wainscoting Wall Panel at Lowes.com

I plan on using polycarbonate twinwall panels (those plastic greenhouse walls) with this same paneling glued to either side for the interior walls. The only place there will be a lot of wood in this vehicle is the subfloor plywood and support stringers, which by necessity (for thermal break) and price (because expensive aerospace materials are not in the budget) were wood.
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Old 11-06-2015, 06:44 PM   #7
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aaronsb I checked out your panels you posted from Lowes that you will be using, and that looks awesome! How are you attaching? We spray foamed top bottom and sides, and ribs are showing on ceiling so I was hoping to screw right into that...scared taht plastic might crack? What did you use?
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Old 11-06-2015, 06:56 PM   #8
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That looks like FRP to me.

If so, they make glue just for FRP. You can also use contact cement.

I will be covering most of my interior with white FRP. Mine will be contact cemented right onto 2" premium rigid Styrofoam. No need for plywood to mount it onto.

Nat
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Old 11-07-2015, 07:15 PM   #9
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FRP Board

Ok, went to home depot and decided on this FRP board.
4 ft. x 8 ft. White .090 FRP Wall Board-MFTF12IXA480009600 - The Home Depot

It is super flexible, plenty of space for head room, plastic, and seems like we can even screw it into the ribs as well. It was pricey at $32 per 4'x8' panel...but we were also about to get a thin steel or aluminum for the ceiling and pay double or triple...so we ended up saving in our budget Will hang tomorrow so we will see how it goes!
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Old 11-07-2015, 09:46 PM   #10
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FRP needs a backing behind it to keep it from becoming a floppy wrinkled mess.
Screwing it directly to the ribs will cause cracking at the holes and tearing.

I will be backing mine with 2 inch premium Rigid Styrofoam.

Also nothing interior should ever be screwed from the inside directly into the outside metal. This is a thermal bridge. It will cause condensation, water rust / mold.

This is why some of us strap the interior with 2x4's running horizontal, spaced 16 inches apart from the floor up.
This becomes what the entire interior secures too.

Nat
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