Q: Polyiso foam - reflective side in or out?

pikushu

Member

• Aug 29, 2016

• #1

the attached picture is of the board that I have to nail up in order to contain heat and to protect from flybys. I plan to layer panda film on top. I just don't know whether or not to put the shiny side facing inward or outward. not really sure where to find an answer. thanks for the help in advance!

 

Stomper420

Active Member

• Sep 2, 2016

• #2

I've read that the shiny side faces inward.

 

Cabinet Cropper

Well-Known Member

• Sep 2, 2016

• #3

The metallic side faces outward. The reason is so it blocks radiant heat and IR further away from the space it is designed to insulate/protect.

 

Stomper420

Active Member

• Sep 3, 2016

• #4

I got that, later too..I wonder if you use it to black out a window, will that space between the glass and foil get super heated and melt the foam.

 

Cabinet Cropper

Well-Known Member

• Sep 3, 2016

• #5

Stomper420 said:

I got that, later too..I wonder if you use it to black out a window, will that space between the glass and foil get super heated and melt the foam.

Click to expand...

No. Not unless it is 157 degrees or so

 

pikushu

Member

• Sep 4, 2016

• #6

Stomper420 said:

I've read that the shiny side faces inward.

Click to expand...

thanks for replying.

 

Moflow

Well-Known Member

• Sep 8, 2016

• #7

The shiny face is to help reflect the radiation.
If you want to keep radiated heat in the room shiny side in.
If you want to keep the sunshine radiation out, silver side out
I use double sided sheets and a cavity , all air through the floor.