How to fit venetian blinds

Inspired by a helpful YouTube guide. This walk-through draws on “How To Fit Venetian Blinds” by 247 Blinds, a UK made-to-measure blinds specialist whose fitting guides are among the clearest available. The video is particularly useful on the bracket positioning and headrail clipping sequence, which is where most first-timers hesitate.

1. Decide: inside recess or face fit

An inside recess fit sits within the window reveal for a neat, flush look. A face fit mounts the brackets on the wall or window frame above the recess, covering more of the window surround and giving better light block at the sides.

Inside recess is the standard choice for most UK homes, but check the recess depth first. The blind headrail needs clearance to tilt the slats properly — most aluminium venetian blinds need about 50 mm of depth in the recess. Less than that and you need a face fit.

2. Measure carefully

For an inside recess fit, measure the width of the recess in three places (top, middle, bottom) and use the smallest measurement. Deduct 5 mm for clearance. For height, measure from the top of the recess to the sill.

For a face fit, add at least 50 mm to each side of the window opening for the brackets, and plan the drop to clear the sill by a centimetre or two. Order your blinds to your finished measurements rather than guessing.

3. Mark and drill the bracket positions

Hold one bracket against the ceiling or top of the recess and mark the screw holes in pencil. Repeat at the other end, then use a spirit level or a tape measure to check both brackets are at the same height across the window. A venetian blind that hangs even a couple of millimetres off level is noticeable every time you look at it.

Drill the holes and plug them. In a tiled window surround, use a tile drill bit and go slowly. In a uPVC window frame, use self-tapping screws at the correct size — most blind brackets include these.

4. Fix the brackets

Screw the brackets into place firmly. Most venetian blind brackets have a hinged or clip-open face that allows the headrail to be inserted, then locked closed. Open the clip now and check it moves freely. If it is stiff from the factory, ease it with your thumb a few times before fitting the blind.

For heavier wooden slatted blinds, use wall plugs rated for the weight. Aluminium venetian blinds are light, but it is still worth using a decent plug rather than assuming the plaster will hold.

5. Clip in the headrail

Offer the headrail up into the open brackets and push it back until it seats firmly. Then close the bracket clips or locking tabs so the headrail cannot pull forward. Give the blind a gentle tug downward before fully loading it with slats — if the headrail feels secure, you are ready to hang the blind.

On some bracket designs the headrail slides in from one side. If that is the case with yours, start at the end furthest from the operating cord to make the final positioning easier.

6. Test the operation and fit the bottom rail

Pull the operating cord to raise and lower the blind. It should move smoothly without sticking. Twist the rod to tilt the slats — they should rotate through their full range without binding at the edges.

If the bottom rail sits slightly out of level, most venetian blinds have a small equaliser clip on the lift cord. Adjust it until the bottom rail hangs parallel to the sill. That said, if the window recess itself is not quite level, there is a limit to how much adjustment helps.

When to call a handyman

Call Richard if the window frame is an unusual material, if the blind is wide and heavy enough that getting the levelling right matters, or if you want several blinds fitted in one go across multiple windows. The job itself is simple — but the measuring stage is where mistakes happen, and a wrongly-measured blind that is cut to size cannot be returned.