window insulation plastic sheets for winter worth it?

[Bad00SS]

So its that time of the year again and everybody is talking about using the plastic sheets that shrink with heat around your windows. The box claims 35% reduction in heat loss from that room. I find this hard to believe. anyone got real world heating bill data how much this helps? I have a huge picture window in the living room. That room seems colder than the other rooms. I'm curious would this make a noticeable difference? there's no drafts, its sealed up tight. its just cold glass i'm assuming.

 

[SwampCat]

Try this, I have double pane windows and put the heat shrink plastic on also. Breath on your window on a cold day, it fogs up right ? Breath on a plastic wrapped window, it does not fog up. That tells me it works. Turns the double pane into a triple pane for cheap. I also caulked around the window trim to the wall, amazing how much draft was there. House was built in the early 60s, northern Il. also.

 

[Bretny]

It really depends on how your house was built, how the windows where installed and what type of windows.

If your seeing a major gain by cawlking the trim you should pull the trim off anf spray foam the crack thes most likely not insulated.

 

[yeldogt]

The product really works when it's old drafty single pane windows .. I got to be an expert with the stuff on my old gothic double hung units.

Huge difference.