Window Treatments Long Narrow Windows: Motorized Setup Guide

I live in a modern townhouse with three extremely tall, 15-inch wide windows flanking my fireplace. For months, the afternoon sun would blind me while watching TV, but finding window treatments long narrow windows that didn't require pulling three separate dangling cords felt impossible. Adding smart, motorized shades changed the dynamic of the room entirely—now they lower in unison at 3 PM when the sun hits the glass, and I never have to squeeze behind the sofa to adjust them.

Because skinny windows, sidelights, and architectural slits have minimal horizontal space, standard smart blinds rarely fit. The internal motors and battery packs simply need more room. By the end of this guide, you will know exactly how to measure, power, and connect motorized shades for those awkward, narrow frames.

What You Need to Know First

• Minimum Width Limits: Most built-in tubular motors require a minimum window width of 20 to 24 inches. For anything narrower, you will need an external battery pack or a specialized micro-motor.
• Mounting Depth: Narrow windows often have shallow frames. Ensure you have at least 1.5 inches of depth for an inside mount, otherwise, the headrail will protrude.
• Connectivity Protocol: Because tiny battery packs hold less charge, avoid direct Wi-Fi motors. Opt for Zigbee, Thread, or Z-Wave to extend battery life.
• Fabric Stack: Tall, narrow windows require a lot of fabric. Choose thin materials (like cellular or sheer roller) so the 'stack' doesn't block the top quarter of your glass when fully open.

Installation & Retrofit Constraints

The Minimum Width Problem

When shopping for a window treatment for narrow windows, the absolute limiting factor is the motor tube. Standard motorized roller shades house a lithium-ion battery and a tubular motor inside the top roller. If your glass is 14 inches wide, a 20-inch motor tube obviously will not fit. To bypass this, look for brands that offer external battery wands or hardwired micro-motors. Cellular shades are often the best retrofit option here, as the motor sits horizontally in the headrail rather than inside a rolling tube.

Inside vs. Outside Mount

Skinny windows usually look best with an inside mount to preserve the architectural lines of the room. However, if your window depth is less than 1.5 inches, the motorized headrail will stick out. If you are forced to do an outside mount for narrow window coverings, I highly recommend installing a single, wider motorized shade that covers multiple narrow windows at once, rather than mounting three tiny, separate outside-mount cassettes that clutter your wall.

Power & Motor Options

Battery vs. Hardwired

If you are building a house or doing a deep renovation, run low-voltage wire to your narrow windows immediately. Hardwiring eliminates the need for bulky battery packs, which are notoriously difficult to hide on small window coverings for narrow windows. If you are retrofitting, you will likely rely on battery power. Expect to recharge or swap batteries every 4 to 6 months, depending on how often your smart home routines trigger them.

Smart Ecosystem Integration

Hubs and Voice Routines

I strongly advise against direct-to-Wi-Fi motors for narrow blinds. Wi-Fi chips drain small batteries incredibly fast. Instead, look for Zigbee or Matter-over-Thread motors that connect to a smart hub (like an Apple TV, Echo Show, or SmartThings hub). Once connected, you can group all your narrow shades together. I have mine tied to a temperature sensor; if the living room hits 75 degrees, the shades drop to 50% to block the afternoon heat.

Living with window treatments long narrow windows: Day-to-Day Reality

I installed a set of motorized cellular shades on the 14-inch sidelights next to my front door. Sourcing window treatment ideas for narrow windows was a headache, and the installation had a major learning curve. Because the internal tube was too small for a built-in battery, I had to mount a separate AA battery tube behind the headrail. It sticks out about 15mm from the wall and catches dust, and un-clipping it to change batteries is incredibly frustrating in such a tight space.

Another thing nobody mentions is the sound. The micro-motor on my narrow bedroom unit makes a distinct, high-pitched hum. It is barely audible during the day, but highly noticeable when the house is dead silent at 6 AM. That said, having them automatically close at dusk for privacy, without me having to walk around the house pulling cords, is a massive daily relief.

Frequently Asked Questions

Can I still open motorized narrow blinds manually during a power outage?

Most motorized shades do not have a manual override clutch. If the battery dies or the motor fails, you cannot pull them down by hand without risking damage to the internal gears. Hardwired units will obviously stop working during a power outage.

How long do batteries last in small motorized shades?

Because narrow shades are lighter, the motor does less work. However, the battery packs are also smaller. You can generally expect 4 to 6 months of life with one up/down cycle per day. Using a solar charging panel can extend this indefinitely, provided the window gets direct sunlight.

Do I need a hub for smart sidelight blinds?

It depends on the protocol. Bluetooth motors connect directly to your phone but lack out-of-home control. Wi-Fi motors connect directly to your router but drain batteries fast. Zigbee, Z-Wave, and Thread motors require a compatible smart hub or border router to function with Alexa, Google, or HomeKit.