Thread: Window Foil
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Old 02-05-2018, 11:59 AM   #6
Senior Member
City: PNW
Country: USA
Vessel Model: American Tug 435
Join Date: Jul 2014
Posts: 258
Outside the glass might be slightly better but its not always practical. Honestly this is exactly like the countless people that swear by the effectiveness of those solar shades you place inside your car windshield; in my experience they make a huge difference even when inside the glass as long as they have a reflective surface to them. I've used them with success on many vehicles when living in Texas.
They work by reflecting a large percentage of the heat back, plus blocking the solar energy from being absorbed in everything inside the cabin.
For the boat at least as a temporary solution, we found huge rolls of that foam backed foil at an RV store very inexpensive, and cut it to size our helm windows for when the boat is stored for long periods.
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