Best Blinds to Keep Heat Out During Hot Summer Months

You want a cooler home without running your AC nonstop. The best blinds to keep heat out do a lot more than block light—they slow heat before it reaches your room. With the right thermal window coverings, you cut heat gain, protect furniture from fade, and bring your energy bill down. This guide walks you through the winners, how they work, and how to pick the best window coverings to keep heat out for your setup.

Quick Picks: Best Window Coverings to Keep Heat Out

• Cellular (honeycomb) shades: top insulation thanks to air pockets
• Solar shades (tight weave): reduce glare and radiant heat while keeping the view
• Roller shades with reflective backing: bounce sunlight back outside
• Roman shades with thermal liner: soft look with added insulation
• Wood/faux-wood blinds with cloth tapes: solid slats plus fewer cord-route gaps
• Plantation shutters: thick louvers create a sturdy heat barrier
• Vertical blinds with lined panels: good for patio and sliding doors
• Layered setup (shade + drapery): blocks light leaks and boosts heat control

How Heat Sneaks In (and How Blinds Stop It)

Sunlight hits glass and turns into heat. That heat moves inward through the pane and around the frame. Your coverings fight this in three simple ways:

1. Reflect: light colors and reflective backings bounce sun away.
2. Trap: air pockets (like in honeycomb shades) slow heat transfer.
3. Block gaps: side channels, tight fits, and layers stop light leaks that “beam” heat inside.

Pick products that do at least two of the three and you’ll feel the difference on the hottest days.

The Winners, Explained

Cellular (Honeycomb) Shades — Your MVP for Summer Heat

If you want maximum insulation from a slim profile, go with cellular shades. The “cells” trap air, which slows heat moving through the window. Go double- or triple-cell for the strongest buffer. Light or reflective fabrics help even more. For tall windows, top-down/bottom-up keeps privacy while letting hot air vent near the top.

Best for: bedrooms, street-facing rooms, and any window that bakes in afternoon sun.

Solar Shades — Keep the View, Cut the Heat

Solar shades use a tight weave that filters sunlight and reduces radiant heat. Openness matters: the lower the openness (1–5%), the more sun you block. Pick a lighter color to reflect more heat. If you love your view and hate glare, solar is a sweet spot.

Best for: living rooms and home offices where you still want to see outside.

Roller Shades with Reflective Backing — Slim, Clean, Effective

These look sleek and work well in modern spaces. A metalized or white backing bounces sunlight before it soaks into the room. Add side channels or a cassette to cut light leaks across the top and sides.

Best for: minimalist rooms, narrow frames, and high-traffic areas.

Roman Shades with a Thermal Liner — Style + Insulation

You get soft folds and a cozy look, plus a heat-blocking liner stitched to the back. Mount them outside the frame and go a few inches wider than the glass to reduce gaps.

Best for: living rooms, dining rooms, and design-led spaces.

Wood & Faux-Wood Blinds — Heavier Slats, Better Block

Thicker slats help block sun, and cloth tapes cover the holes where cords run—cutting tiny “light beams” that heat the room. Tilt slats upward during the day so they reflect sunlight toward the glass instead of the floor.

Best for: kitchens and busy rooms where you want durable, wipeable blinds.

Plantation Shutters — Built-In Barrier

Shutters add a rigid layer right at the window. Tight frames reduce air movement, and wide louvers are easy to angle against glare. Painted white finishes reflect more light than dark stains.

Best for: street-facing windows, bathroom privacy, and coastal looks.

Vertical Blinds for Sliding Doors — Big Openings, Big Savings

Large glass doors bring in loads of heat. Vertical blinds with lined or heavier vanes help a lot. You can also pair vertical cellular shades with a track system for sliding doors; they insulate like standard honeycombs but move side-to-side.

Best for: patio and sliding doors, wide windows, and sunrooms.

Layered Approach — Shades + Drapery = Cooler Rooms

One layer blocks light; the second catches what sneaks through. A cellular or solar shade paired with lined drapery trims side leaks and boosts insulation. Choose a light, reflective drape lining for best summer results.

Best for: bedrooms and media rooms where you want darker, cooler spaces.

How to Pick the Best Set for Your Windows

• Sun direction: West and south windows bake in the afternoon; prioritize cellular or reflective roller shades there.
• View vs. privacy: Want the view? Choose low-openness solar. Want privacy and cooling? Double-cell honeycomb wins.
• Glare control: If screens are hard to read, go solar or darker honeycomb fabrics.
• Color: Light/white faces reflect heat better than dark ones.
• Mount style: Outside mount covers more glass and reduces leaks; inside mount looks built-in but needs side channels for max cooling.
• Operation: Top-down/bottom-up helps vent heat high up while keeping privacy. Motorization lets you schedule shades to drop before the sun hits.
• Doorways: For sliding doors, think vertical cellular or lined verticals so panels won’t swing and slam.
• Budget: If you’re set on value, start with cellular shades on the hottest windows first; layer later as needed.

Pro Tips for Extra Heat Control

• Go wider and taller: Order a few inches wider/taller (outside mount) to cover leaks.
• Add side channels: On inside mounts, channels on the jambs stop light lines that heat the floor.
• Reflective backings: White or metalized backs bounce sunlight back out.
• Seal the stack: For romans or rollers, choose a valance/cassette so hot light doesn’t pour over the top.
• Set a schedule: Drop shades before direct sun hits the glass. Raise after peak hours to bring in daylight without the late-day heat.
• Combine inside + outside: Interior shades plus exterior solar screens or awnings (if allowed) cut heat even more.
• Mind the frame: Drafty frames still leak heat; add weatherstripping where you can.

Room-by-Room Picks

• Bedroom: Double-cell honeycomb in a light color; add blackout liner if you sleep past sunrise.
• Living Room: Low-openness solar to keep your view and stop glare; layer with lined drapery for evenings.
• Kitchen: Faux-wood blinds or wipeable rollers with reflective backs; tilt up during the hottest hours.
• Home Office: Solar shades (1–5% openness) to cut screen glare and heat while you keep natural light.
• Sliding Doors: Vertical cellular or lined vertical blinds; consider a light, reflective face.

Your Cool-Home Game Plan

• Fit your sunniest windows with cellular shades or reflective rollers.
• On view windows, use low-openness solar and add lined drapery if you need more cooling.
• For doors and wide spans, go vertical cellular or lined verticals.
• Choose light, reflective finishes, mount wide, and block side gaps.
• Set a daily shade schedule so your rooms stay cool before the heat builds.

Ready to cool things down? Pick the best blinds to keep heat out for your toughest windows, then layer where needed. You’ll feel the drop in room temps—and see it on your next bill.