Bedroom Blackout Guide for Dhaka Shift Workers and Late Sleepers
Dhaka does not really do darkness. Even at 3 a.m. in a Dhanmondi 8th-floor bedroom, streetlight bleeds around the curtain, a security floodlight from the next building glares in through the balcony door, and the pre-dawn call to prayer arrives with its own ambient sky glow. For a shift worker who needs to sleep from 7 a.m. to 3 p.m., or a family with an infant who naps twice a day, this is not a nice-to-have — it is what determines how you feel every day.
Here is how we build a genuinely dark bedroom in a Dhaka apartment, in the order the problems appear.
What “blackout” actually means
The word gets abused. In practice there are three fabric tiers, and only the third one is genuinely dark:
- Dim-out (70–85% light block). The room is darker but you can still see across it in the daytime with the fabric down. Most cheap “blackout” curtains from Bashundhara City fabric floor are this.
- Blackout (95–99% block). The room is night-dark in daytime if the fabric is intact and mounted with no gaps. This is the tier you want for a bedroom.
- 100% blackout (foil-lined or double-lined). Zero light through the fabric itself. Only meaningful if you also solve the edge-leak problem, otherwise the fabric is over-specified.
The tier alone does not make the room dark. Fabric grade solves the through-fabric leak. It does nothing about the around-fabric leak, which is the actual problem in most Dhaka bedrooms.
The three light-leak paths, ranked by severity
- The gap between the blind and the wall on both sides. In a standard installation this is 8–15 mm per side. On a west-facing window at 3 p.m., this gap alone lights the room to reading level.
- The gap at the top, between the blind roll and the ceiling / window trim. Usually 20–50 mm. Directly aimed at the ceiling above your head, so it bounces down onto the bed.
- The gap at the bottom, where the blind meets the sill. Smallest gap but often visible as a bright line at pillow height.
Solving these three gaps matters more than which blackout fabric you buy. A ৳8,000 blind mounted with side channels beats a ৳15,000 blind mounted with no side channels every single time.
The layered approach
We recommend two layers per window:
- Layer 1 — a fitted blackout blind, mounted inside the window recess or with side channels. Options here include a fabric roller blackout roller blind for a minimal look, a blackout roman blind for a more finished bedroom, or a blackout honeycomb blind if you also want the thermal insulation the honeycomb structure gives.
- Layer 2 — a heavy blackout curtain hung outside the recess, wall-to-wall, floor-to-ceiling. The curtain solves the side-gap and top-gap problems that the blind cannot, by hanging past them. The blind alone will not do it; the curtain alone will not do it; the two together will.
If you can only do one layer, do the blind with proper side channels, and accept that the corners of the room will be lighter than the centre.
Vertical blinds for sliding balcony doors
Bedrooms in newer Dhaka builds often have a sliding balcony door instead of a window. This changes the answer. A roller cannot span a 7-foot slider well. A blackout vertical blind does — the vanes overlap when closed and can be rotated for airflow when you want ventilation without light.
The specific problem of streetlight
Dhaka streetlights are LED and cold-white, which means the leak is bluer and more disruptive to melatonin than warm-white would be. Two fixes make a real difference:
- A short cornice above the top of the window frame — a 6-inch wooden or MDF box mounted an inch out from the wall — blocks the top-gap leak completely and looks intentional.
- A blackout-lined roman valance or pelmet does the same job with more visual softness. If your apartment already has decorative valances, you may only need to line them with blackout fabric rather than replace them.
Cost, honestly
For a standard 5 x 4 ft bedroom window in Dhaka in 2026:
- Basic blackout roller, no side channels, drilled fitting: ৳4,500–6,500
- Same, with side channels: add ৳1,800
- Blackout roman blind in mid-range fabric: ৳9,500–14,000
- Blackout curtain layer over the top: ৳4,000–8,000 for fabric + rail
- Realistic total for a proper two-layer bedroom setup: ৳16,000–24,000 per window
For a west-facing bedroom that is your main sleeping room, this is the highest-return furniture money you will spend in the flat.
What we would skip
- “Blackout” contact film on the glass. It looks awful within a season, is hard to remove without damaging the frame, and does nothing about edge-leak.
- Portable sleep tents over the bed. They exist. They do not survive a hot summer.
- Extra-thick curtain rails without a real curtain track. A stiff rail cannot bear a properly heavy blackout curtain; you will end up replacing both.
Related reading
If you are furnishing a bedroom from scratch rather than retrofitting one, the KB Window Fashions bedroom-focused guide for Dhaka covers the fabric-vs-mechanism decision in more depth. Their bedroom-relevant category page for roman blinds is a useful reference for what a finished-looking bedroom install looks like in practice.
The one-sentence answer
If you get one thing right, get the mounting right: side channels or a full-recess install, plus a curtain layer that covers the sides and top. Everything else is secondary.