06/18/2026
Most people get statement #3 wrong, so do not feel bad.
The myth: a blackout roller shade makes a room 100% dark, edges and all. It does not. The fabric blocks light beautifully, but on a standard inside mount a thin line still leaks in around the sides and the top.
Good news: the gap is the easy part to solve. An outside mount, side channels, or extra width can get you to a genuinely dark room.
Want one bedroom blacked out right? Book a free in-home consultation.