No, not completely. Plantation shutters block most light and are excellent for privacy, but with the blades fully closed, light still seeps between them and creates a faint glow around the panel edges. For most rooms, that is more than enough. If you genuinely need a fully dark room, a shutter on its own will not get you there, and it is worth knowing that before you buy.
This is not a flaw. The blades overlap when closed, but they are not sealed against each other the way a blockout fabric seals against a window frame. That overlap is what gives shutters their light control and their classic look, and it is also why a small amount of light always finds its way through.
For a living room, a study, or a general bedroom, shutters do the job very well. The issue only becomes a problem if you need a completely dark room: a shift worker sleeping during the day, a baby's room, or a home cinema. In those specific cases, the shutter alone is not the answer on its own. For a full overview of which rooms shutters suit and what to expect from the process, see our guide to plantation shutters.
Two places: between the blades, where the overlap is good but not airtight, and around the panel perimeter, where the frame meets the window reveal. Neither gap is large. Together they let in a soft, ambient light rather than pinpoint beams, but they are also enough to keep a room from reaching true blackout.
This is one of the most common things customers misunderstand before buying shutters, and one of the most common reasons for a complaint after installation when the expectation was not set clearly. We would rather you know this now than be surprised later.
A curtain in front of the shutter is the most popular and most decorative option. The shutter handles daytime light control and privacy; a blockout curtain drawn at night gives full darkness. See our guide to pairing plantation shutters with curtains for getting the proportions right.
A roller blind behind the shutter is a more functional, lower-profile alternative. A blockout roller fitted behind the panel drops for night-time darkness and disappears into the recess during the day.
Sashes or sealers fitted around an existing panel reduce light leakage around the edges, though they will not achieve full blackout on their own.
For most bedrooms, a shutter paired with a blockout curtain gives you everything: the classic look and daytime light control of the shutter, full darkness when you need it, and a layered, finished window. It is also worth knowing that a split tilt shutter, where the top and bottom sections operate independently, lets you close the lower blades for street-level privacy while keeping the top open for sky light. That flexibility reduces how often you need full blackout in the first place.
Privacy is excellent even with the blades only partially open, far better than a sheer curtain or translucent roller at the same angle. Light control is genuinely precise: the ability to redirect light upward or downward rather than simply blocking or admitting it is something few other window coverings can do. And a split tilt configuration gives you two zones of control on a single window, a real advantage where privacy needs differ from top to bottom.
Shutters block most light and give excellent privacy, but they are not a true blackout product. A small amount of light always seeps between the blades and around the panel.
For living rooms, studies, and most bedrooms, this is more than enough.
For rooms that need total darkness, pair the shutter with a blockout curtain or roller blind.
A curtain in front is the most popular and decorative pairing; a roller blind behind is a lower-profile alternative.
Split tilt shutters let you close the bottom for privacy while keeping the top open for light, reducing how often full blackout is needed.
Not sure whether shutters alone will give you the light control you need? Book your free measure and quote and our consultants will assess each room and be straight with you about what will work.
A significant amount, but not all. With the blades fully closed, shutters block most direct light and give strong privacy, but light still seeps between the blades and around the panel edges. For a room that needs total darkness, pair the shutter with a curtain or roller blind.
A shutter alone cannot achieve true blackout. The most effective fix is a blockout curtain in front, or a blockout roller blind fitted behind. Sashes or sealers reduce light leakage but will not eliminate it entirely.
They give excellent privacy and significantly reduce light, but if total darkness is the goal, a shutter alone is not enough. Pairing it with a blockout curtain or roller blind is the right solution where complete darkness genuinely matters.
Often, yes, particularly at a partially open angle. A shutter with tilted blades still blocks a direct line of sight, while a roller blind at the equivalent point would need to be fully down.
