Bedroom Window and Blackout Questions Checklist

Write down who sleeps in this room and which of them wakes because of light rather than because of sound.

Two people in one bed often have quite different sensitivities, and only one of them usually gets consulted.

Note the part of the year when this room is hardest to sleep in, since light arriving early and light lingering late are separate problems.

A covering chosen for one of them can disappoint completely for the other.

Consider whether the aim is a room that is genuinely dark or one that is simply dimmer, and record which, because those lead to different conversations.

What any particular covering will achieve is for its manufacturer and supplier to state for the product being supplied.

Note whether anybody has to sleep in this room during daylight, such as somebody who works at night or a young child.

Daytime sleeping is a much harder requirement than night-time darkness and needs saying out loud early.

Write down whether the same person also wants to wake with daylight, since darkness at one end of the night and light at the other is a genuine conflict.

Naming the conflict lets somebody propose two layers rather than one compromise that suits neither.

Consider whether children have to go to sleep in this room while it is still bright outside, and note how that is handled at present.

Close the existing covering in daylight, shut the door and stand in the room until your eyes adjust, then note every place light is arriving from.

Waiting for your eyes to adjust reveals gaps that are invisible in the first moments in the room.

Note whether light comes around the sides of the covering, over the top of it or beneath its bottom edge, and write down which of the three.

Each of those routes is dealt with differently, so recording which one matters more than recording that light gets in.

Consider whether the covering sits inside the window reveal or across the face of the wall, since that decides where the edges fall.

Which arrangement suits your window is for the covering supplier to advise on after seeing it.

Write down whether light passes through the material itself or only around it, because those are two entirely different disappointments.

Owners often replace a fabric when the gap at the edge was doing all the work.

Note light arriving from somewhere other than the window, such as under the door, through a keyhole or from a landing fitting left on.

Consider anything above the main window, such as a fanlight, a borrowed light or a rooflight, that no covering currently reaches.

How a high or awkward opening could be covered and reached is for the supplier and fitter to establish on site.

Note everything fitted to the window itself, including the handle, any stay, any restrictor and any vent, and mark which a covering would have to clear.

This is the list the fitter needs and the one owners most often forget to mention when ordering.

Whether any restrictor or vent may be obstructed is for a suitably qualified professional and the supplier to confirm.

Write down whether the reveal looks square and whether the frame sits deep, flush or projecting into the room.

A reveal that narrows towards one end is common in older rooms and changes what can be fitted inside it rather than across it.

Consider what is directly above the window, such as a boxed-in area, an existing pole, a bulkhead or a sloping ceiling.

The space above the opening is what decides whether one layer or two can be hung, and it is rarely measured before ordering.

Note what a covering would actually be fixed to, and raise it rather than assuming any surface will take a fixing.

What sits behind a plastered reveal varies from room to room, so this is a question for the fitter rather than something to work out by tapping.

What a reveal, lintel area or ceiling will take is for a suitably qualified professional or the fitter to establish.

Write down what sits under the window, such as a heat emitter, a deep sill or a piece of furniture, that limits how far a covering can hang.

Anything hanging near or over a heat emitter should be raised with a suitably qualified heating professional.

Stand in the room at night with every light off and write down what shines in, whether that is a street lamp, a security light or a lit sign.

External sources are constant and specific, and naming them changes what a covering is being asked to do.

Note whether headlights sweep across the ceiling, from which direction they arrive and roughly how often that happens.

A moving light on a ceiling wakes people who sleep through a steady one, and it is only ever noticed by somebody lying in the bed.

Consider anything outside that switches itself on, including a sensor light on a neighbouring property, and note what triggers it.

Anything on a neighbouring property has to be raised with them directly and confirmed locally rather than planned around here.

Write down whether each source is constant or intermittent, since a light that comes and goes disturbs sleep quite differently from a steady one.

This distinction is worth passing on, because it affects what a covering has to block and when.

Note which of these sources would still matter with the covering you are considering, and ask the supplier rather than assuming it deals with all of them.

What a covering does with a bright external source is for its manufacturer and supplier to state.

Try opening the window with the current covering closed and note what has to be lifted, pushed aside or held out of the way.

This is a test that takes a moment and predicts most of the daily irritation.

Consider whether the window is opened at night for air, since a covering that must be raised to reach it will be raised and then left up.

That single habit undoes a blackout arrangement more reliably than any gap at the edge.

Note whether a covering would move or knock in a draught with the window open, and whether that sound would be noticed from the bed.

Write down whether the window opens inwards, and what a covering would have to do to allow it to open fully.

Consider what happens on a wet or windy night with the window open and the covering hanging across it, since fabric and weather rarely agree.

Households often close the window on those nights and then sleep warm and stuffy, which is a ventilation habit worth recording alongside the covering choice.

Note whether you want more than one covering here, and write down what each layer is meant to do rather than treating the second as decoration.

One layer for darkness and one for daytime privacy is a different brief from one for looks and one for light.

Consider whether there is room above the window for two fixings, and ask about it before either layer is ordered.

Whether both layers can be fitted at this window is for the supplier and fitter to establish before anything is measured.

Write down whether curtains would draw back clear of the glass, and where the fabric would sit when open.

Curtains that stack across the glass quietly remove daylight the room needs all day to solve a problem it has at night.

Note that a heavier layer may need a different fixing from a light one, and ask rather than assuming one arrangement will carry both.

Fixings for any covering are for the fitter and a suitably qualified professional to determine for that wall or reveal.

Consider how both layers would be operated by somebody half asleep in the dark, and be honest about whether both would be used every night.

A layer that is fiddly at night stops being used within a short time and stops solving anything.

Note whether children use or sleep in this room, and put the cord and fitting question to the supplier before anything is ordered.

This is a question to raise at the point of ordering, when the arrangement can still be changed, rather than after the covering is hanging.

Cord and fitting arrangements are for the manufacturer and supplier to advise on for the specific product being supplied.

Write down whether the covering would sit against glass that runs with moisture in cold weather, and ask what that means for the material.

Moisture appearing on glass is a building question for a suitably qualified professional and should not be treated as a covering choice.

Consider how the covering would be cleaned and whether somebody in the household could take it down and put it back without help.

Anything needing two people or a ladder over a bed tends not to be cleaned, which shows on a bedroom covering sooner than people expect.

Note how often this covering would be operated and by whom, since that decides the mechanism far more than its appearance does.

A bedroom covering is used every day at both ends, which is heavier use than most window coverings in a home.

Write down what would happen if a mechanism stopped working, including who you would contact and whether parts could be matched later.

A covering that cannot be drawn is a bedroom problem the same night it happens, so knowing who to ask is worth settling in advance.

Repairs, spares and matching are for the supplier and manufacturer to confirm for the product you choose.

Ask who measures this window, what they need access to on the day and what they will want you to have decided beforehand.

Note which decisions have to be made before decorating and which can come afterwards, and ask rather than guessing at the order.

The right sequence for fixing, decorating and fitting is for the professionals doing the work to confirm.

Write down what you want the supplier to tell you in writing about how the material behaves in daylight over time.

Fading and movement are supplier questions, and the answers are much easier to obtain before an order than after one.

Consider holding a sample where the covering would actually sit, at the hour the room is at its brightest, before deciding anything.

Materials look entirely different against your own glass from how they look in a showroom or a photograph.

Note who in the household disagrees about how dark this room should be, and settle it before anybody measures rather than afterwards.

An unresolved disagreement usually produces a middle option that neither person wanted and that nobody will admit to having chosen.