5mm Reflective Insulation Foam Core Radiant Barrier 40“ × 80” Double Aluminum Foil Cold and Heat Shield Thermal Insulation for Ceilings,Walls,Steel Buildings,Roofing ect

It is not at expected level, product is not good.

I just completely covered my bedroom window with this in the winter since I only ever just sleep in there anyway. Kept my room much warmer than without it. I couldn't really use the cling film since there's no trim on my window.

Good

These insulation blankets were bought to line the inner walls of an RV to help keep summer heat out. They were easily cut to fit the area of the wall. Sticking them up with two sided tape worked well and once complete the RV was more comfortable in the hottest part of summer. I likely will buy more next year and continue to insulate

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