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Old 09-11-2017, 07:47 AM   #1
Traveling
 
Join Date: Nov 2015
Location: Midwest
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Year: 2003
Coachwork: BlueBird
Chassis: TC2000
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Rated Cap: '00
Unique window approach -thermal loss

So, my bus has no windows for the most part. I like the idea of free light, but hate loosing the insulation. Double pane RV windows were suggested.

Would need to come up with way to seal it, but...

Glass Block windows?

Seves Glass Block Clarity Glass Block 8in x 8in x 3-1/8in. $24
Actual Width (in.): 7.75 in
Actual Height (in.): 7.75 in
Actual Thickness (in.): 3.125 in
Manufacturer Warranty: 5 Year
U-Value: .264
R-Value: 3.78
Visible Light Transmission: 76%
884 clarity_1.png


I also love the idea of putting these in the ceiling/wall- sorta like stained glass.

Seves VetroPieno Solid Glass Full Brick Blue
9.5"x 4.6" x 2"
24 cm x 11.7 cm x 5.3 cm

Glass-Block-Nordica_vetropieno.jpg

Glass-Block-Neutro_vetropieno.jpg

Glass-Block-Blu_vetropieno.jpg
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Old 09-11-2017, 07:56 AM   #2
Bus Geek
 
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I think glass block can work if you can find a flexible material to mortar them with.. the typical is more like a concrete consistency / grout.. also would wasnt that in and of itself to be insulating.. glass block windows with center screened-vents are common place here in ohio for basement and bathroom windows.. I dont know how well they insulate, since most of the modern windows are actually charged with some type of gas to help with the insulating properties.. and the 2 panes of glass are isolated from each other... has to be 20X better than school bus windows though!
-Christopher
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Old 09-11-2017, 09:21 AM   #3
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Quote:
Originally Posted by cadillackid View Post
I think glass block can work if you can find a flexible material to mortar them with..
I was thinking more of a molded gasket with a channel to hold the skin of the bus, like windshields use. Cut a larger piece to length and splice end w sealant.
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Old 09-11-2017, 09:58 AM   #4
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That's a cool idea. In addition to the seal maybe you'd want some kind of mechanical clip to prevent the blocks being moved by wind pressure, collision, etc. If several blocks are to be used together, maybe something like body seam sealer could be used in place of the mortar that a fixed building would use.
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Old 09-11-2017, 12:17 PM   #5
Skoolie
 
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Intriguing idea. It would let in light while maintaining privacy, and it does have dead air space inside to help reduce thermal conductivity. That rubber gasket material could probably seal them without holding them too tightly.

One concern does come to mind - Is that glass safe for on-road use? I mean, is it safety glass or tempered glass? I have no idea what those bricks are made out of, so maybe it is, but I'd check before using them.

I'm actually considering a way to put round windows into a bus using round sheets of glass that are available for glass table tops. Curiously enough, those tables are tempered glass, so they meet safety requirements for side glazing.
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Old 09-11-2017, 01:43 PM   #6
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Quote:
Originally Posted by lucasd View Post

I'm actually considering a way to put round windows into a bus using round sheets of glass that are available for glass table tops. Curiously enough, those tables are tempered glass, so they meet safety requirements for side glazing.

Those bricks would survive a crash- they are impossible to break.

Love the round window idea. tell us more- how sealed? I wanted to put these in by the kids bunkbeds or roof:

pet-peek-fence-window-for-dogs-1.jpg
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Old 09-11-2017, 01:57 PM   #7
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Kids would love the domed window!

I've been planning to have windows made from flat plate for my bunk beds (for lack of better creativity, obviously!). They'd be about 10x20 inch rectangles with radiused corners. To secure them into place I've been looking at C.R. Laurence 10252 one-piece weatherstrip for mounting 1/8 to 3/16 inch glass into a panel 1/16 to 3/32 inch thick. That's how windshields were installed Once Upon a Time, and I'm told it's still used for applications like industrial equipment (tractors). Similar products accommodate thicker glass and/or thicker panels.

Where does one buy a domed window like that, and is it tempered?
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Old 09-11-2017, 02:02 PM   #8
Almost There
 
Join Date: Aug 2017
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I've seen an RV that had the windows replaced with thin glass strips at standing eye level instead of big tall windows. It seems like a good idea to me, the view is there if you want it, privacy is good because you would need a ladder to peak in unless you were 8'+ tall and you cut your window insulation losses by probably 80%. I bet it's easy making short curtains too.

I think free light is a bit over rated, 20-30 watts of well planned LED lighting should make a Bus nice and bright and using a flashlight to look in to the back of cabinets and other dark spots isn't too big of an inconvenience. At times when you don't need it nice and bright, 5-10 watts of LED lighting should be enough to dimly light a bus. It's not a big power draw unless you have no solar or you are cutting it really really close.

I don't think I would try glass block for RV windows, even if it was just one strip. I would be too worried about having one pop out or shatter due to body flexing or vibration. I think I would probably look for some sort of coated polycarbonate (but I'm not sure that's a good idea either). If the insulation value is a big deal, just use less window.
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Old 09-11-2017, 03:32 PM   #9
Skoolie
 
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Quote:
Originally Posted by Rusty View Post
Love the round window idea. tell us more- how sealed?
So far, I think the best approach would be to make a flat, circular frame out of metal (like the rim of a Frisbee) that fits into the hole for mounting the window. That way, the round frame could be rigidly attached via bolts or welds to the wall supports and outer skin, while the glass itself is held in place to the backside of the ring via a series of retaining clips. Eternabond type compound and sufficient pressure from rivets/clips should keep water infiltration from occurring.

I think it will take some metal work to make the outer edge where the frame meets the skin of the bus actually look nice, but it seems possible.
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Old 09-11-2017, 05:14 PM   #10
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Quote:
Originally Posted by lucasd View Post
So far, I think the best approach would be to make a flat, circular frame out of metal (like the rim of a Frisbee) that fits into the hole for mounting the window.
So, angle aluminum bent in a circle?

discus-circle-aluminum-2.jpg

I actually bought a porthole for a boat to test

81mxmizZ05L._SY355_.jpg
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