/diy/ - Do It Yourself

>>1476296
It wont work if you paint it black. The shiny is what keeps most of the heat out.

>>1476296
Glass is a poor surface for paint to adhere to, I'd use UV safe vinyl. Spray on plastidip might be the go as well, it won't flake at least.

>>1476301
>Glass is a poor surface for paint to adhere to
I'm not painting the glass. I'm painting the reflectix then hot gluing rare earth magnets to the windows and reflectix to put it on or take it off as needed

>>1476299
You're right but the black part I'm mainly going to use for winter.

If I used the black part in the summer, wouldn't it at least keep some of the heat out because there is reflectix still on one side?

>>1476302
Just spraypaint a piece of cardboard and us that. Less complicated and will work just as well.e

>>1476305
why? that wouldn't keep out heat

>>1476306
i think thats the point

>>1476308
then it's useless to me
I need something that keeps out heat

The reflection is what deflects the heat. Light=heat. You stupid idiot

>>1476309
then dont paint it.

if you paint it you might as well use cardboard

>>1476314
why wouldn't the reflectix work somewhat with the shiny part on the inside?

>>1476315
because the sun shines on it from the outside you dip

>>1476315
holy shit you have an entire sun in your van? how is the even possible?

WOW.. OP must be the dumbest person on today... tons of asvice and still insists that the shiny on the inside will do any good when the outside is what will keep heat out

its sad that people today have no intelligence level beyond that of a tomato.

oh well let OP do as he wishes and totally defeat the purpose of reflecting the outside light to keep his rape van cool. he will find out the hard way.

>>1476319
>>1476320
then why do lunch boxes have the shininess on the inside?

>>1476309
Rigid foamboard insulation, then. It'll be better than cardboard at least.

>>1476332

to keep the heat INSIDE because the heat source is on the INSIDE you dumb motherfucker. holy shit man you are a fucking moron.

>>1476352
brainlet I'm talking about when these lunchboxes are used to keep things cold

>>1476332
>>1476353
The shiny stuff is plastic or nylon coated in gold or silver to reflect heat waves. If you paint over the metal surface it won't work. They use this stuff for space blankets aka emergency blankets. The shiny stuff reflects heat. You can use mylar to protect your car from heat by covering your windows with the shiny stuff outward.

>>1476356

its a lost cause this dumb fucking OP keeps insisting that the advice he has been given by several people is wrong and hes determined to assume his idea is the right way. he has no idea why the shiny part is on the inside to keep the contents hold or cold and why on the outside it keeps the heat out from reflecting the light/heat back away from the surface. OP is just another dropout who knows nothing and has no brains to learn

>>1476358
>its a lost cause this dumb fucking OP keeps insisting that the advice he has been given by several people is wrong and hes determined to assume his idea is the right way. he has no idea why the shiny part is on the inside to keep the contents hold or cold and why on the outside it keeps the heat out from reflecting the light/heat back away from the surface. OP is just another dropout who knows nothing and has no brains to learn
OP here, why are you so angry?
I'm not dead set in my position. You guys are telling me things that contradict my previous viewpoint and now I'm conflicted and researching this more.


You faggot.

>>1476368
>You guys are telling me things that contradict my previous viewpoint and now I'm conflicted and researching this more.

should have researched it in the first place DUMBFUCK instead of dragging on about "OMG I DONT BELIEVE IT WILL WORK THAT WAY"

Reminder that it is best to stay calm when discussing things with humans

"In all things, a calm heart must prevail"
- Fawkes (2277)

>>1476376
damn this guy is angery

>>1476383

well, considering OP is refusing to accept the advice given, when several people have given him the right advice, after a while you get frustrated at their inability to comprehend why he was told what he was told. at this point, its useless to continue to give advice when everything OP needs to do what he asked has been mentioned several times over.

>>1476396
>well, considering OP is refusing to accept the advice given
where is this occurring?

>when several people have given him the right advice, after a while you get frustrated at their inability to comprehend why he was told what he was told
OP just asked for elaborations on why said this doesn't work
this isn't that complicated

>>1476296
Heat is infrared light. Aluminum is the most reflective metal you can easily get. It reflects the heat.

Black is the least reflective color. It will absorb heat instead of reflecting it. You will make things worse.

Ideally you want that reflective material on the OUTSIDE of the van not inside. If you have inside the glass will heat up.

I'm not a hardware person but you're best off painting the windows from outside with some paint that adheres to glass.

>>1476352
Just use a heat coin, duh.

>>1476320
john titor

Hey guys, I have a mirror I want to use but I want to paint it black. It's still reflective on the inside so it has to work as a mirror even when covered in paint. For reasons. I know this because I am mentally defective idiot and I live in a van down by the river.

>>1476426
>I'm not a hardware person but you're best off painting the windows from outside with some paint that adheres to glass.
I want to be able to see out of the windows when I need to drive

>>1476447
>when I need to drive
Homeless people's vans don't run.

>>1476383

>>1476473
angery

Paint one side and flip it over seasonally.

Not sure if this would work but I guess he could buy polarized sheets. So light from above would not get in, only reflected light. But the film will still warm up from the sun. If I were OP I would try different things and see what sticks.

>>1476332
>>1476353

Thats not a lunch box for keeping stuff cold but to keep hot stuff hot.

>>1476296
What about a film on the window to obscure the foil

>>1476563
What if I told you it works both ways.

>>1476556
that's the plan

What paint should I use though?

>>1476573
How? Wouldn't the film on the window absorb heat and heat up the reflectix?
The reflectix wouldn't be receiving hardly any rays from the sun

Just park in the shade stupid OP and heat problem is solved. See? you don't really need brains.

>>1476596
Just buy the black reflectix people are trolling you they make black reflectix for this very reason colors dont mater only materials do

Or you know ceramic reflective window tint.

>>1476296
Paint it white. Or use that stuff they use to insulate grow boxes. Just google "white reflective film"
Painting it black is going to make it significantly hotter.

>>1476296
You'll probably look crazier with black painted reflectix than regular reflectix that just looks like you're keeping heat out.

>>1476296

Paint won't stick to reflectix worth a shit, first time you bend it the paint will flake off. Cut some black felt a little larger and wrap around the edges and use a regular office stapler to staple the felt to the reflectix around the edges. Easy, cheap, and holds up good.

Source - person who lives out of a pickup with a fiberglass canopy because reasons.

>>1476635
growing weed in the van

>>1476299
>>1476315
>>1476312
>>1476323
>>1476358
The stupid, it burns.

It will work with the shiny part on the inside - in fact that's the way it's SUPPOSED to be installed. How do you think this shit wokrs in attics when there's a shingle roof above it anyway?

It's a radiant barrier, not insulation - it works because the aluminized surface does not radiate heat energy (much). It should be about 97% non-emissive if it's made properly. Even if it gets hot, 97% of that heat will not be passed on.

What painting the outside black will do is increase heat gain from conduction. Barrier doesn't reflect > it gets hot > it directly heats the air touching it. This is only a small part of overall heat gain though so it's still effective. Most of the heat gain through a window is from IR waves passing through it, heating the air, and heating the interior surfaces. The barrier will stop all that regardless of whether the outside is shiny or not; all that's left is the air physically touching the barrier.

https://www.greenbuildingadvisor.com/article/radiant-barriers-a-solution-in-search-of-a-problem

As for what kind of paint, good luck. As flexible as bubble wrap is, almost any paint will just flake off as it bends. The only thing remotely flexible enough will be latex paint, and even that won't last if the stuff moves around. It may be easier to glue the shiny bubble shit to a piece of cardboard facing outwards and then paint the cardboard.

>>1477560
>he thinks radiance is anything but a surface property
radiant barriers on rooftops have airgaps on them dumbass

>>1477636
Not radiance, emissivity. Dumbass.

https://www.engineeringtoolbox.com/emissivity-coefficients-d_447.html

Do you fuck nuts even know how to google?

>>1476296
tint the windows with blackout film. it blocks UV
and its cheaper than other stuff

buy a van without windows.../thread

>>1477560
>paint something black
>black absorbs light energy
>turns light energy into heat
>gets hot
>thing is inside van
>inside van gets hot
whoops!

Op just leave them silver and tint your windows 5%vlt. They'll look black and when you don't have them on you'll still block out the heat

>>1476296
Get a black cloth, maybe felt and cover it with that. Layer the reflectix on the inside layer. Affix it however you want..

Or if you're okay with mirror tint, that's aluminized so it reflects lots of heat. It'll also ruin cellular reception because it also reflects radio waves.

>>1477862
This is a really good idea. Let the tint do most of the work and let the reflectix keep it insulated.

Protip:

Glass is a damn good insulator. Once the heat gets in glass keeps it there. Window tint reflects the heat, keeping it out in the first place.
If you put a reflector inside the glass, you'll have an oven between them.

>>1478144
THIS

I'd also recommend getting as dark a tint as you can on your windows.

>>1476296
Why would you look crazy? Normies use that shit to keep their car from getting too hot to sit in all the time.

Use black window film.
https://www.youtube.com/watch?v=1irE-PLVxzE

There are many colours avaliable with various transparency and nontransparent also.

>>1476296
Put a white curtain up and then find a way to mount this about an inch from the curtain.

Keep it silver. The point is to keep the light from being absorbed into something inside of the car. When you paint it black, that heat is absorbed which heats the material. That material COULD emit some heat back out the window as radiation but it's not that hot so it wouldn't help much (grey body problem). Once the heat is in the reflectix it would then be convection and conduct into the car. Since windows are fairly okay thermal resistors the heat would stay trapped in the car.

Again, the point is to keep the light (heat) from being absorbed into something inside the car.

To double up, you could staple 2 together with spacers between them which would create an air barrier reducing the rate of conduction for heat which is absorbed.

If you wanted to use them year round, simply staple black felt to one side. During the winter, black out = more heat in car. During the summer, silver out = less heat in car. Easy.

Look up the heat equations and the modes of heat transport. Really think or watch videos explaining them. They become very intuitive when you eventually get them.

Source: Chemical engineer.

>>1476473
Have you always been this insecure?

Oh jeez.

>>1476302
>If I used the black part in the summer, wouldn't it at least keep some of the heat out because there is reflectix still on one side?
That's not how it works. The reflective surface is what does the job. If it's on the other side it's not doing anything.