Bay Window Blinds: The Complete Guide to Getting Them Right

The angles, the multiple panes, the window handles that protrude into the recess — bay windows present practical challenges that a standard window simply does not. Getting it wrong means gaps, light bleed, fittings that interfere with handles, or blinds that look fine in isolation but mismatched as a set.

This guide covers the key decisions: understanding your bay type, choosing the right blind style, and why professional measuring and fitting makes a meaningful difference to the finished result.

Know Your Bay Type First

Bay windows come in two main forms, and the distinction matters when choosing how to dress them.

Angled Bay Windows

The most common type found in UK homes, particularly in Victorian, Edwardian and inter-war properties. The side windows project outward at an angle, typically between 30 and 45 degrees, with a flat front window. Each section needs to be treated individually, and the angles at the corners create fitting challenges that require precise measurement.

Box or Square Bay Windows

Found in newer builds and some period homes, a box bay features side windows that return at 90 degrees to the front. The angles are simpler to work with but the right-angle return creates its own fitting consideration, particularly for blinds where headrail depth could cause brackets to clash at the corners.

Identifying which type you have before buying anything saves a great deal of trouble. Some blind types and fitting approaches suit one bay configuration much better than the other.

The Best Blind Types for Bay Windows

Roman Blinds

Roman blinds are one of the most popular choices for bay windows, particularly in living rooms and period properties. Fitted individually to each section of the bay, they create a cohesive, tailored look when all are raised or lowered together. The soft fold of a Roman blind suits the character of a bay window well, adding texture and warmth without obscuring the window itself.

Made-to-measure Roman blinds fitted to each pane sit close to the glass with a relatively slim headrail depth, which helps manage the corner clearance issue that affects wider blinds in angled bays. For rooms where the bay window is a prominent feature, a Roman blind lets the architecture remain visible while still providing practical light control and privacy.

Roller Blinds

Roller blinds fitted individually to each pane are a clean, versatile solution that works across both bay types. They are available in a wide range of fabrics including blackout, thermal, and solar-control options, making them adaptable to different rooms and orientations.

A set of roller blinds across a bay window creates a uniform, contemporary look when all are at the same height. For rooms where the bay receives direct sun, a solar fabric roller is a practical choice that manages glare and heat without darkening the room. For bedrooms, a blackout roller in each section ensures complete light control regardless of the angle of the bay.

Venetian Blinds

Venetian blinds offer the most precise light control of any option for bay windows. The ability to tilt slats independently or in unison across the bay gives excellent flexibility throughout the day, particularly useful in south or west-facing bays where the angle of sunlight changes significantly.

Wooden Venetian blinds bring warmth and character that suits period properties well. Aluminium Venetians provide a cleaner, more contemporary look and are better suited to rooms where moisture or condensation is a factor. Both types fit neatly within individual panes and are available in made-to-measure widths.

Pleated Blinds

Pleated blinds are an excellent fit for bay windows because they stack very compactly at the top of the window when raised. This is particularly useful in bays where headroom within the recess is limited, or where you want the window to appear as uncluttered as possible when the blinds are up.

Perfect Fit pleated blinds, which clip into uPVC window beading without drilling, are especially practical for bay windows. They remove the bracket-depth issue at bay corners entirely, sit flush against the glass, and eliminate gaps at the edges that can otherwise let in light and reduce insulation performance.

Vertical Blinds

Vertical blinds are less commonly considered for bay windows but can work well, particularly in curved bays or where other blind types struggle to follow the window shape. Curved vertical blind track systems are designed to follow the arc of the bay, allowing the blind to sit neatly around the full curve without breaking it into disconnected straight sections.

In box bays with larger panes, standard vertical blinds fitted to each section also provide effective light and privacy control. They suit a more contemporary interior and are particularly practical in rooms that double as home offices, where precise light management through the day is useful.

Combining Blinds and Curtains in a Bay

Bay windows are one of the best settings for layering blinds with curtains. Individual blinds fitted to each pane handle the practical work of light control and privacy, while curtains on a curved or angled track frame the entire bay as a single architectural feature.

This approach solves a problem that affects many bay window curtain installations. A single curtain track that cuts straight across the front of the bay either hides the side windows entirely when the curtains are open or leaves the angled panes completely uncovered. A track that follows the shape of the bay keeps all panes accessible and allows curtains to stack neatly at the sides when not in use.

Roman blinds paired with curtains work particularly well in bay windows. The blind handles privacy and light during the day; the curtains add warmth, softness and insulation in the evenings. The combination gives the window a finished, considered quality that a single treatment rarely achieves.

Common Bay Window Blind Mistakes

A few recurring problems come up with bay window blind installations that are worth knowing about before you start.

Measuring each pane as if it were the same

In most bay windows, the individual panes are not identical in width, and in older properties the drops can vary too. Taking a single measurement and assuming it applies to every section is one of the most common reasons blinds do not fit properly. Each pane should be measured individually, and the smallest drop measurement used across all to maintain a level appearance.

Not accounting for window handle depth

Bay window handles often protrude further into the recess than those on standard windows. A blind headrail or bracket that does not clear the handle will either fail to sit flat or cannot be raised and lowered properly. Measuring the projection of handles before choosing a blind type or fitting method prevents this problem entirely.

Bracket clash at bay corners

In angled bays, the brackets of two adjacent blinds can interfere with each other at the corner if the headrail depth is not accounted for. This is why the depth of the chosen blind matters alongside its width. Made-to-measure suppliers and professional installers factor this in as part of the measuring process, but it can catch out anyone working from general dimensions alone.

Choosing a product that cannot follow the bay shape

Some blind types are simply not suited to certain bay configurations. A single wide roller blind, for example, cannot follow the angles of a splay bay and will leave uncovered gaps at the sides. Choosing a product designed to work within individual panes, or one with a track system that follows the bay shape, avoids this problem at the outset.

Why Professional Measuring Matters in a Bay

Bay windows are the single most common window type where professional measuring pays for itself. The combination of multiple panes, non-standard angles, handle clearance, bracket depth, and corner clearance means there are more variables than in any other window fitting scenario.

Around 60% of bay window installation problems trace back to measurement errors made before fitting. Getting those measurements right the first time, from a professional who has handled the same configuration before, removes the risk of receiving blinds that do not fit or perform as expected.

At Redwood Blinds, we measure and fit bay window blinds across Dorset and Hampshire. Our free home consultation gives you the opportunity to see fabric and blind samples in your own space, discuss the options for your specific bay type, and get accurate measurements taken by someone who installs bay window blinds regularly.

Get Your Bay Window Right First Time

Bay windows deserve to be treated as the feature they are. The right blinds, properly measured and fitted, keep the window looking its best while giving you practical control over light and privacy throughout the day.

Explore our full range of made-to-measure blinds at redwoodblinds.co.uk/products or call us on 07925 084214 to book a free home consultation across Dorset and Hampshire.