The best heat-blocking blinds are cellular shades (honeycomb shades), which use hexagonal air pockets to trap heat, and exterior solar shades, which block the sun before it hits your glass. For interior blinds, choosing light-colored materials is crucial, as they reflect sunlight rather than absorbing it.
To keep heat out, the best overall options are cellular shades and thermal blackout Roman shades. These materials create a physical insulating barrier that traps outdoor heat and blocks solar radiation before it can warm your room.
Blockout roller blinds
If you're looking to make your home as private as possible, and stop heat and light from entering your home, then blockout blinds are the perfect solution. They are some of the best shades to keep heat out of your room because they prevent solar rays from entering entirely.
Heat-blocking blinds trap air and reflect sunlight to keep your home cool and lower your AC bills. The most effective options are cellular shades (which trap heat in honeycomb pockets), thermal blackout roman shades, and solar shades (which block UV rays while preserving your view).
To block window sun heat, the most effective approach is intercepting the sunlight before it hits the glass. Top solutions include installing exterior solar screens, applying reflective solar window films, or using insulating interior treatments like cellular honeycomb shades.
The most affordable and effective way to block sunlight is using aluminum foil taped directly to the window panes. For a slightly more aesthetic and rental-friendly approach, you can use peel-and-stick window cling film, paper blackout shades, or cardboard cut to fit the frame.
Some of Stewart's homes utilize interior blinds for light regulation and privacy. Others feature windows framed by exterior shutters, operable versions of which can also be used for light control, ventilation and privacy.
The best sun-blocking blinds depend on your needs. For blocking heat while preserving the view, Solar Roller Shades are ideal. For maximum temperature insulation, Cellular/Honeycomb Shades are top-rated. For absolute darkness and screen glare elimination, 100% Blackout Blinds are the standard.
Trending Window Treatment Ideas for Every Room
Ditching shades has a lot of upsides regardless of who you are. Uncovered windows bring in natural light, boost well-being, and offer a view of the world outside. The trade-off, of course, is that they also put those inside on display to passersby, and in the summer, they channel heat.
Keeping blinds and curtains closed throughout the day can keep a room cool. Use external shading such as awnings or shutters if you have them as they are much more effective than internal covers.
The largest source of heat loss in a typical house is uncontrolled air leakage (drafts), accounting for up to 38% of lost heat. Warm air escapes through hidden cracks and gaps, while the following structural areas are the primary culprits for escaping warmth:
To block intense solar heat while keeping your room bright, ditch standard heavy blackout drapes and opt for thermal sheers or light-colored, light-filtering cellular shades. These use reflective backings and tightly woven fabrics to bounce away infrared heat while beautifully diffusing natural daylight.
CONS: -Can be difficult to clean: Because they are installed on the window, blackout blinds can be more difficult to clean. -May not provide as much insulation: Blackout blinds may not provide as much insulation as blackout curtains.
Blackout curtains block light, but they do not always reduce heat because heat enters through sunlight warming the glass, air leaks around the frame, and gaps around the curtain edges.
Solar shades are modern window coverings crafted from a specially designed fabric that reduces glare, blocks UV rays, and minimizes heat transfer. Unlike traditional blinds or shades, solar shades allow natural light to filter through while preserving an unobstructed view of the outdoors.
2026's Best Blinds
Popular alternatives to vertical blinds include sliding fabric panels, Smart Drapes, vertical cellular shades, and sheer vertical shades. These options provide superior light control, modern aesthetics, and easier access to doors.
Joanna Gaines’ window treatments prioritize organic textures, warm neutrals, and maximizing natural light. Her signature modern-farmhouse style focuses on framing views instead of hiding them by hanging curtains high to make ceilings feel taller, utilizing light-filtering materials, and incorporating custom wooden elements.
Cellular (honeycomb) shades and highly reflective outdoor solar shades are the most effective window treatments for keeping heat out. They trap or block heat before it enters your room.
Luxury Blinds for Windows
The most popular blinds right now prioritize clean aesthetics, safety, and convenience, with cordless and smart motorized blinds leading the trend. Homeowners are primarily opting for the following styles:
Key Points. Vinyl blinds and honeycomb shades now feel dated in modern interiors. Cafe curtains in lace or florals can make a space look old-fashioned.
Martha Stewart, 83, has nothing to hide. She's always been unabashedly candid about her life and career, including her divorce and her 2005 stint in prison for insider trading. And now, the lifestyle guru is opening up about being diagnosed with the autoimmune disease vitiligo for the very first time.
To get a clear view outside while blocking people from looking in, you can apply a one-way daytime privacy film. These reflective or tinted films create a mirror-like effect on the outside during the day when sunlight is bright, but allow you to see out perfectly.