Blackout Honeycomb Blind

Because "blackout" describes the fabric, not the installation. The cloth itself passes no light, but a blind mounted inside the reveal must be cut a few millimetres narrower than the opening in order to move, and daylight finds that gap. If total darkness is the goal, mount outside the frame with a two to three inch overlap on each side and a deeper drop below the sill. Say so before we measure and we will size it that way from the start.

The mechanism is real: the cells hold a layer of still air against the glass, and still air is a poor conductor, so heat crosses the window more slowly. What that is worth depends on your window — a west-facing pane in full afternoon sun benefits far more than a shaded north window, and a double-cell fabric does more than a single. It is a genuine improvement in comfort and AC cycling, not a replacement for the AC.

Both are valid, and they give different results. An inside (reveal) mount looks tidier and keeps the sill usable, but a little light always escapes at the edges. An outside mount overlaps the frame by two to three inches on each side and is the only way to get a genuinely dark bedroom. Tell us which you want and measure accordingly — our /measure guide walks through both with the exact points to record.

Every fabric fades eventually under direct sun; the question is how fast and how evenly. Solution-dyed polyester and sunscreen mesh hold colour far better than printed cotton-look fabrics, and mid tones show fading less than deep navy or black. A west or south-west window is the harshest position in a Dhaka flat, so if that is where the blind goes, choose a lighter mid tone and expect the visible side to soften slightly over several years rather than patch unevenly.