TDBU Up & Down Double Cell Honeycomb Blinds, Blackout

Need complete darkness on demand — but still want flexibility? Our cordless top down bottom up blackout blinds — also known as cellular curtains — are the most versatile honeycomb shades for bedroom use. They block 100% of light when fully closed, while giving you the option to open from the top for natural light. These TDBU cellular shades are ideal for bedrooms, nurseries, and home theaters across the US, Canada, and Australia — available in warm earth tones including soft taupe, oat white, and natural greige that blend seamlessly with modern interiors.

Not sure if TDBU is right for your windows? See our Honeycomb Cellular Shades: The Complete Guide for a full breakdown of cell count, fabric types, and room-by-room recommendations.

Key Features:

• Dual Function Design: Move the top and bottom panels independently — bring in light from above while keeping privacy below, or lower fully for complete blackout. The defining feature of top down bottom up blackout blinds.
• Thermal Insulation: Advanced honeycomb structure traps air to reduce heat loss in winter and block heat in summer. For a full breakdown of how this works, see our guide to insulated cellular shades.
• Noise Reduction: Cellular design absorbs outside noise for a quieter, more peaceful living space.
• Energy Saving: Reduces reliance on heating and cooling systems year-round.
• Cordless & Child-Safe: Clean, modern look with no cords — safe for homes with children and pets.
• Elegant Appearance: Minimalist design that complements a wide range of interior styles.

Specifications: Sold individually. Available in custom sizes. Our TDBU cordless cellular shade is precision-cut to your exact measurements for a perfect fit every time.

Frequently Asked Questions

Q: What makes these top down bottom up blackout blinds different from standard blackout shades?
A: Standard blackout shades raise and lower as a single unit. These TDBU cellular shades have two independently movable rails — you can lower the top panel for natural light from above while keeping the bottom raised for privacy, or close fully for 100% blackout. It's the best of both worlds for bedrooms and street-facing rooms.

Q: What is the most popular size?
A: 34" wide × 48" high in White — the top-selling size for standard bedroom windows in North America.

Q: Can I order in a custom size?
A: Yes — all our TDBU cellular shades are available in custom sizes. Simply enter your exact window measurements when ordering. Need help measuring? See our window measuring guide or our full Measuring & Installation Guide.

Q: Should I choose blackout or light filtering fabric?
A: For bedrooms and nurseries, blackout is almost always the right call — complete darkness supports better sleep. For living rooms and offices, light filtering is more versatile. See our Blackout vs Light Filtering guide for a full room-by-room breakdown.

Q: What room works best for TDBU cellular shades?
A: Bedrooms are the most popular application — blackout fabric blocks 100% of light for better sleep, while the TDBU design allows daytime natural light without sacrificing privacy. Also popular for bay windows, where each pane is fitted individually — see our Bay Window Blinds Guide for measuring and installation tips.

Q: How does TDBU work?
A: Lower the top panel for light from above while keeping the bottom raised for privacy, or raise the bottom for a traditional look. Both panels move independently — that's what makes top down bottom up blackout blinds so versatile.

Q: Are these blinds cordless?
A: Yes — cordless lift system on both rails, safe for children and pets.

Q: How do I choose between single, double, and triple cell shades?
A: The key difference is insulation performance (R-value). Double cell shades offer significantly better thermal efficiency than single cell — ideal for most homes in the US, Canada, and Australia. → Read our complete R-Value Comparison Guide

Q: Are these cellular shades suitable for French doors?
A: Yes — our TDBU cellular shades for French doors are one of the most popular applications. The top-down bottom-up design lets you control light and privacy independently on each door panel, making them ideal for French doors in living rooms and bedrooms across the US, Canada, and Australia.

Q: Do you offer cellular shades for sliding glass doors?
A: Yes — our cordless TDBU cellular shades work well on sliding glass doors, letting you adjust light from the top while maintaining privacy at eye level. For a full guide on choosing and measuring, see: Cellular Shades for Sliding Glass Doors.

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