Lazblinds 40" Blackout Roller Shades
Our 40-inch blackout roller shade delivers complete light control for medium to large windows. We engineer each shade with triple-layer blackout fabric that blocks 100% of incoming light, creating the perfect sleep environment for bedrooms, nurseries, and media rooms.
The 40" width accommodates standard double-hung windows and provides edge-to-edge coverage when properly mounted. Our cordless lift system operates smoothly and safely, while the durable aluminum headrail ensures years of reliable performance. Available in classic neutrals that complement any décor, these shades install in minutes with our included mounting hardware.
- 40-inch width fits standard medium to large window frames
- Triple-layer blackout fabric blocks 100% of light for total darkness
- Cordless lift mechanism for child-safe, smooth operation
- Durable aluminum headrail with powder-coated finish
- Easy inside or outside mount installation with included brackets
Safe Cordless Operation System
We equip every 40-inch blackout roller shade with our proprietary cordless lift mechanism that eliminates dangling cords and chains. Simply grasp the bottom rail and pull down gently to lower the shade, or pull down and release to engage the spring-loaded retraction.
The slow-rise safety brake prevents the shade from snapping upward, protecting both the fabric and nearby furniture. This system meets all CPSC safety standards for child and pet safety, making it ideal for nurseries and homes with young children.
Care and Maintenance Guidelines
Our blackout fabric resists common household dust and pet hair thanks to its tight weave and anti-static treatment. For routine cleaning, use your vacuum’s brush attachment on low suction to remove surface debris weekly.
Spot-clean stains immediately with a damp microfiber cloth and mild dish soap solution, blotting rather than rubbing to preserve the fabric’s blackout properties. The 40″ width allows easy access to the full shade surface without removal.
What's Included With Your Shade
Each 40-inch blackout roller shade arrives ready to install with a complete mounting kit. You’ll receive two universal brackets that accommodate inside or outside mounting, plus all necessary screws and wall anchors for drywall, wood, and masonry surfaces.
The shade itself comes pre-assembled with fabric rolled onto the aluminum headrail and the bottom rail attached. We include a detailed installation guide with photo diagrams showing both mounting methods and measuring techniques.
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Questions About Your 40" Blackout Roller Shade
Measure your window frame width at the top, middle, and bottom. For inside mount installation, your frame should measure between 39.5 and 40.5 inches wide with at least 2 inches of recess depth.
For outside mount, the 40" shade fabric will extend that full width, so add 3-4 inches beyond your frame on each side to prevent light gaps. If your window measures significantly larger or smaller, explore our full size range from 24 to 72 inches wide.
We don't recommend cutting the shade width, as this requires specialized tools to trim the aluminum headrail and fabric simultaneously while maintaining the cordless mechanism alignment.
Instead, order the next size down—our 36-inch model—for narrower windows. We offer widths in 4-inch increments to ensure you get the proper fit without modification. Cutting the shade yourself will void the warranty and may compromise the blackout seal.
Yes, when properly installed with minimal side gaps. The triple-layer fabric achieves complete opacity, blocking visible light entirely.
For absolute zero light leakage, choose inside mount installation and ensure your window recess is deep enough for the shade to sit flush. Small amounts of light may appear at the edges with outside mounting, which you can eliminate using our optional light-blocking side channels or blackout tape.
Our blackout shade uses triple-layer opaque fabric that blocks 100% of light, creating total darkness ideal for sleep and media viewing. The light-filtering version uses a single-layer semi-sheer fabric that diffuses incoming light while maintaining daytime privacy.
Both share the same 40" width, cordless mechanism, and aluminum headrail construction. Choose blackout for bedrooms and nurseries where you need complete darkness, or light-filtering for living spaces where you want soft natural light with privacy.
Vacuum the fabric weekly using your vacuum's brush attachment on low suction to remove dust and pet hair. For spot cleaning, use a damp microfiber cloth with mild dish soap, blotting the stain gently.
Never machine wash, submerge, or use harsh chemicals on the shade, as this damages the blackout core layer. For deep cleaning every 6-12 months, wipe the entire surface with a barely damp cloth and allow to air-dry completely before retracting.
Most customers install the shade themselves in 15-20 minutes using basic tools: a drill or screwdriver, level, and measuring tape. We include universal mounting brackets, all hardware, and a detailed photo guide with each shade.
The 40" size is manageable for one person but works best with two people to ensure level bracket placement. Our online video tutorials walk through both inside and outside mount methods step-by-step.
We cut every 40" blackout shade to your exact specifications in 1/8-inch increments. Standard lengths range from 24 to 96 inches, covering most residential window heights.
For windows taller than 96 inches, contact our custom department for extended length options. Measure your window height at three points and provide the longest measurement when ordering to ensure complete coverage. All custom lengths ship within 5-7 business days.