I want to insulate our garage doors to keep garage warm in the winter. Will this help? Also, I have wooden doors, will this only work on steel doors?

According to most websites reflective foil needs at least a four inch gap between the outer wall and the foil. It works best when there is an air space. My garage door has foam panels than fit in each segment perfectly. Before you buy anything do a Google search and trust only reputable sources.

Is this stuff effective in keeping the radiance of the sun out of your room if you staple it to your window frame?

Yes, I use it in RV windows and it's remarkable at keeping the light and heat down. It would IMO work terrific in windows, just remember it's opaque.

Does this insulation need to be against the metal garage panels or leave an air gap to reflect the summer sun's heat? I need it to reflect heat

What I did was to cut it down to the right sizes of the garage panels and just gently squeeze them into each panel. Then I tested the outside and inside of each panel before and after the installation using an infrared thermometer during the peak summer here in Vegas and the average difference was about 13-17 degrees cooler inside.

How many square feet does this cover?

Rolls come in different sizes. Easy to cut to size with scissors. Cut a little larger than you need.

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Reflectix BP24025 24-Inch by 25-Feet Bubble Pack Insulation, 1-Unit

Reflectix BP24025 24-Inch by 25-Feet Bubble Pack Insulation, 1-Unit

Product ID: 5175112

Details

Brand
Reflectix
Item Thickness
0.31 inches
Material
Aluminum
Product Dimensions
300"L x 24"W

📏300" x 24" lightweight roll

🌡️Reflects 97% radiant heat

🛠️7-layer multi-material design

€ 245.57

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

❄️ Reflectix BP24025: Insulate smarter, not harder!

MULTI LAYER STRENGTH - Seven layers including bubble pack and polyethylene combine for durability and superior heat resistance.
ULTIMATE HEAT DEFENSE - Dual aluminum foil layers reflect nearly all radiant heat, keeping your space cooler and more energy-efficient.
VERSATILE APPLICATION - Perfect for crawl spaces, attics, walls, metal buildings, and garage doors—upgrade any space with ease.
INSTANT COMFORT UPGRADE - Noticeably reduces heat transfer and even dampens noise, making your environment more comfortable year-round.
LIGHTWEIGHT DIY FRIENDLY - At just 16 ounces and easy to cut, install professional-grade insulation without the hassle or heavy lifting.

Reflectix BP24025 is a 5/16-inch thick, 7-layer reflective insulation roll measuring 300" by 24". Featuring dual aluminum foil layers that reflect 97% of radiant heat, combined with bubble pack and polyethylene layers for strength and heat resistance, it offers a lightweight, easy-to-install solution ideal for attics, crawl spaces, walls, and garage doors. Highly rated for its effective temperature control and DIY-friendly design, it’s a top choice for millennial professionals seeking efficient, budget-conscious home upgrades.

Specifications

Asin	B0022NH3E4
Best Sellers Rank	#9,538 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #11 in Weatherproofing Window Insulation Kits
Brand Name	Reflectix
Coverage	7200 square inches
Customer Reviews	4.8 4.8 out of 5 stars (1,255) 4.8 out of 5 stars
Global Trade Identification Number	00716511320017
Included Components	Main component only
Item Dimensions L X W	300"L x 24"W
Item Thickness	0.31 inches
Item Weight	16 ounces
Manufacturer	Reflectix
Manufacturer Part Number	BP24025
Manufacturer Warranty Description	Please contact us if you experience any issues within 30 days of receipt.
Material Type	Aluminum
Model Number	BP24025
Number Of Items	1
Number Of Packs	1
Recommended Uses For Product	Insulation in crawl spaces, attics, walls, metal buildings, and post and frame structures; resisting heat flow in specialty and standard construction projects
Unit Count	1 Count
Upc	716511320017

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€ 245.57

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

View all Trustpilot reviews