Blind Fitting Guide: Measure, Choose and Install
Share
A blind that is only a few millimetres out can look wrong, let in unwanted light or catch on a window handle every time you use it. This blind fitting guide keeps the process simple: decide where the blind will sit, measure that space accurately, then choose a style and material that suits the room.
Made-to-measure blinds remove the guesswork of trying to make a standard size work. You still need good measurements, though. Take your time at this stage and the rest of the job is usually straightforward.
Start by choosing recess or face fitting
Before picking up a tape measure, decide whether the blind will fit inside the window recess or outside it. This affects the measurements you provide and how much light the blind can block.
A recess fit sits within the depth of the window opening. It gives a tidy, built-in look and works well where there is enough clear space for the blind to operate. The manufacturer normally makes the small deductions needed for movement, so you should give the exact recess dimensions rather than making deductions yourself.
A face fit, also called an exact fit, is fixed to the wall, window frame or ceiling outside the recess. It is a useful choice for shallow recesses, outward-opening windows, awkward handles or windows where you want greater coverage. For bedrooms, fitting a blackout roller blind outside the recess can reduce the light gaps around the edges.
There is no single best option. A recess fit may look neater in a living room with deep window reveals, while a face fit can be more practical for a bedroom window where darkness matters most.
Check the recess before ordering
Not every recess is suitable for every blind. Look for handles, vents, tiles, alarm sensors and opening windows that could interfere with the blind or its chain. Measure the available depth too, especially if you are considering a roller blind in front of existing shutters or curtains.
For vertical blinds, consider where the louvres will stack when open. A stack on the wrong side can block a door handle or make it less convenient to access a patio door. Decide whether you want the controls on the left or right before ordering.
How to measure blinds correctly
Use a metal tape measure, not a fabric dressmaking tape. Measure in millimetres for the most accurate result, and write each figure down as you go. Do not rely on old blind measurements unless you are replacing the same product in exactly the same position.
For a recess fit, measure the width at the top, middle and bottom of the opening. Use the narrowest measurement. Then measure the drop on the left, in the centre and on the right, using the shortest figure. Recesses are often not perfectly square, particularly in older properties.
For a face fit, first mark the position where you want the blind to sit. Measure the width you need the finished blind to cover, including overlap beyond the window opening, then measure the required drop. A useful rule is to allow enough overlap at each side and above the window to limit light gaps, without covering switches, tiles or trim.
When measuring for a blind above a window, allow room for the brackets and the rolled-up fabric at the top. This is particularly relevant for roller blinds fitted close to a window that opens inwards. The blind should clear the handle and leave enough room for the window to operate if needed.
Record the details that affect the fit
Measurements alone do not tell the full story. Make a quick note of the fitting surface, the side for the chain or wand, and any obstacle near the window. It saves a second round of measuring and helps you order the right option first time.
Check these practical details before you buy:
- whether you are fixing into plaster, wood, uPVC, tile or a ceiling;
- whether there are pipes, cables or metal lintels behind the fitting point;
- whether the window opens inwards, outwards or is part of a door;
- whether a radiator, sill or handle could affect how the blind hangs.
Choose the right blind for the room
The best blind is not always the one that looks best in a sample. Think about light, privacy, moisture and how much day-to-day cleaning the blind will need.
Blackout blinds are a practical choice for bedrooms, nurseries and rooms used for shift work. They help reduce incoming light, but a standard recess fit will still have small gaps around the edges. For stronger light control, choose a face fit with good overlap or pair the blind with curtains.
PVC waterproof blinds suit bathrooms, kitchens and utility rooms because they cope better with damp air and splashes than fabric options. They are wipe-clean too, which is useful near a hob, sink or messy family dining area. In a room with heavy condensation, make sure there is still ventilation behind and around the blind.
Patterned blinds can add interest without filling a room with extra furniture or accessories. In a smaller room, a light pattern can keep the window looking open. Stronger prints work well when the blind is a feature, but order a sample first to check the colour in your own light.
Vertical blinds remain a sensible option for wide windows, conservatories and sliding doors. Individual slats are easy to replace when one gets marked, bent or damaged. That can make more sense than replacing a complete blind in a rental property or a busy family home.
Fitting roller blinds step by step
Most roller blinds are supplied ready to hang, with brackets, a control mechanism and fitting instructions. The exact bracket arrangement can vary, so always check the product instructions before drilling.
First, hold the blind in the intended position and use a pencil to mark the bracket holes. Use a spirit level or measure carefully from a fixed point to make sure both brackets are level. A blind fitted slightly off level may still work, but it can roll unevenly and look untidy.
Drill pilot holes where appropriate, fit the correct wall plugs if needed, and screw the brackets firmly into place. Clip or slot the roller into the brackets in the stated order, then test the operation before tidying the chain. The fabric should roll up straight and lower without rubbing against the wall, handle or sill.
Fit the chain safety device at the correct tension and height, keeping the loop secured away from children and pets. Do not leave a loose chain hanging, even in a room that is not normally used by children.
Fitting vertical blinds without avoidable mistakes
With a vertical blind, start with the headrail. Mark the bracket positions evenly, keeping them clear of any internal mechanisms and close enough to support the rail properly. Once the rail is fitted, check that the carriers move freely from end to end before attaching the slats.
Hang each slat in the same direction and check the louvres rotate together before you finish. If they are twisted or facing different ways, remove and rehang them rather than forcing the control. For replacement vertical slats, measure the existing slat from the top hole to the bottom edge, not simply the window drop.
For patio doors, test the blind with the door fully open and closed. Make sure the control side and stacking arrangement leave a clear route through the doorway.
Common measuring and fitting problems
The most common ordering mistake is treating recess size as finished blind size. If a supplier asks for recess measurements, provide the opening size exactly as measured. Making your own deductions as well can leave a blind too narrow.
Another issue is measuring only once. Walls and window reveals can be uneven, so measuring at three points is worth the extra minute. If the numbers differ significantly, use the smallest width for a recess fit and check whether protruding plaster or tile is causing the restriction.
A blind that catches on a handle is usually a positioning problem, not a product fault. Moving to a face fit, increasing the projection with suitable brackets or choosing a different blind type may solve it. For tenants, always check your tenancy agreement before drilling into frames or walls.
Queen Blinds makes made-to-measure ordering practical, but accuracy begins at your window. Measure carefully, choose the fitting that suits how the room is used, and take a final look at handles, doors and moisture before placing your order. A few careful checks now mean a blind that hangs properly, works easily and earns its place every day.