Bow & Bay
Windows

Bow & Bay Windows

Create a brighter, more distinctive living space with made-to-measure bow and bay windows that add depth, character and wider views to your home. They are ideal for enhancing front elevations while making interior rooms feel more open and inviting.

Bow and Bay Windows

Add space and light with a UPVC bow or bay window Both styles of window are a popular choice, as they combine a high visual impact while offering additional space and light.

Whether you’re looking for a UPVC bow or bay window, then the UPVC Company will have the style and quality to match your home and meet your expectations.

A bay window normally has three openings, whereas a bow window can have upto five. A UPVC bow window, more often seen in contemporary properties, offers a larger internal window ledge area, which can be used to display photographs or other ornaments. The window ledge and the bow window itself can be rounded or angular in shape, both of which give the illusion of more space, as visually the room is extended by the depth of the bow.

While a UPVC bay window actually extends the footprint of the room it sits at the front of, and this style is more commonly seen in older properties.

We offer a wide choice of designs, shapes, colours and finishing touches, so you can be confident that we’re able to match your UPVC bay window (or bow for that matter) to all your new or existing windows in your home

Shaped to fit

Your Sales Advisor will give you all the advice you need on the choice of shapes of your new UPVC window (bow or bay, including splay, square or single-ended) Then, once you’ve decided exactly what you want, our expert fabricators will then make your windows to your specifications, ensuring that they’re the perfect fit.

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Give your Property the Personality it Deserves

Golden Oak
Rosewood
Irish Oak
Black
Antracite Grey

With a choice of colours and woodgrain finishes to make your home as unique as you. You might go for frames in clean, fresh-looking White, traditional Black, subtle Grey or something a little more unusual.

Our woodgrain effect finishes are virtually indistinguishable from traditional timber windows but, unlike wood, these low-maintenance options require no tiresome sanding and painting.

New for 2026 are Black & Anthracite Grey Energy efficient
glass for your home

Replacing the heat lost through your windows can be expensive so don’t throw your money out of the window!

Low emissivity (low-e) energy-efficient windows to help to reduce your heating bills by up to 20% each year.

You can also take satisfaction in the fact that it is not only money you are saving. Using our energy-efficient glass range in your windows will reduce your home’s CO2 output, making your carbon footprint smaller and your home more environmentally friendly.

We offer a range of low-e energy-efficient glazing to suit every type of property, from a modern home to an older traditional styled home.

Patterned Glass

Whether it’s for privacy, pure style or to allow more light into internal rooms, Texture Glass gives you a stylish range of attractive options.
Warwick TM
Chantilly TM
Minster TM
Digital TM
Taffeta TM
Oak TM
Contora TM
Charcoal Sticks TM
Florielle TM
Mayflower TM
Pelerine TM
Everglade TM
Sycamore TM
Autumn TM
Stippolyte TM
Cotswold TM

Add personality to your property with
Decorative Glass!

Leaded, Georgian Bars, Bevels, Fusion tiles … the list is endless.

Visit your local showroom where we have displays of a range of options & images of a whole lot more.

Bow & Bay Windows – Security

Bow and bay windows require strength and security across every frame, joint and opening section. The uPVC Company’s made-to-measure bow and bay windows combine reinforced frames, multi-point locking, lockable handles, internal glazing and high-security components to help protect your home without compromising light, views or architectural character.

Energy Efficient Windows

Glazing Materials

Clear float glass has previously been the major material used for windows in houses. Advances in glazing technology mean that special glass is now available to control heat loss through the window.This low emissivity (low-e) glass has special surface coatings to reflect heat back through the window. The low-e coatings reflect between 40% to 70% of the heat that is normally transmitted through clear glass, while allowing the full amount of light to pass through.This type of glass is now standard under the Building Regulations for most homes in the UK.

Layers of Glass and Air

The traditional approach to improving the energy efficiency of a window has been to increase the number of layers of glass and air. Double- or triple-glazed windows have insulating air- or gas-filled spaces between each pane. Each layer of glass and the air spaces resists heat flow.The width of the air spaces between the panes is important, air spaces that are too wide have higher U-values and allow too much heat transfer. Highly energy efficient windows are manufactured with inert gases (argon or krypton) in the spaces between the panes because these gases transfer less heat than air.

Select energy efficient window to improve comfort and
reduce Greenhouse Gases

Frame Materials

Window frames are available in a variety of materials and the frame material can be selected for price, maintenance or visual appearance. Any frame material can produce energy efficient windows if designed correctly. For consumers, it is important to get the most energy efficient window from the frame material that is chosen.

New Technology

New technologies are being used to develop and improve the energy efficiency of windows.Typical of these is the concept of ‘warm edge’ glazing to reduce heat losses at the edges of the glazing unit.

The following factors affect the whole Window U-value:

Note: Always ensure that a quoted U-value is for the whole window and not simply for the glass.

Frequently Asked Questions
About Bow and Bay Windows

A bay window usually has three angled sections and creates a deeper projection from the property. A bow window typically uses four or five sections to form a softer, curved appearance. Both styles increase natural light, improve views and make a room feel more spacious.
Yes. Old timber, aluminium or uPVC bow and bay windows can usually be replaced with modern double-glazed uPVC windows. The opening, supports, roof and base must be surveyed before manufacture. The uPVC Company provides professional surveys and installation across Central Scotland.
In many properties, a flat window can be converted into a bow or bay window. The work may require structural alterations, a new base, roof and supporting components. Planning or building approval may also be required. The uPVC Company can assess whether the conversion is suitable for your home.
Yes. Bow and bay windows project beyond the outside wall, creating additional depth and a wider view. A bay window may add usable seating or display space, while a bow window creates a broader ledge and a more open feeling.
Yes. Their angled or curved design allows daylight to enter from several directions. This can make living rooms, dining rooms and front-facing rooms feel brighter and more spacious.
Modern uPVC bow and bay windows can be highly energy efficient when fitted with quality double glazing, insulated frames and effective seals. Professional installation is essential because these windows contain several frames and connecting sections.
Replacing an old or draughty bay window with modern double glazing can reduce heat loss and improve comfort. The glazing, frames, roof, base and surrounding seals must all be properly insulated to achieve the best result.
Yes. Well-fitted bow and bay windows with suitable double glazing can reduce traffic and neighbourhood noise. The result depends on the glass specification, seals and condition of the surrounding structure. The uPVC Company can recommend suitable glazing for properties in noisy locations.
Modern uPVC bow and bay windows can include multi-point locks, lockable handles, reinforced frames and internal glazing beads. Security depends on the full window system and the quality of installation.
Yes. Bow and bay windows can combine fixed panes with opening sections. Side-opening casement windows are commonly used to provide ventilation while maintaining a balanced appearance. The uPVC Company can recommend the most practical configuration.
Available designs may include square bays, splayed bays, single-ended bays and four- or five-section bow windows. Each window is made to measure based on the property and the required projection.
Yes. uPVC bow and bay windows are available in a range of colours and woodgrain finishes, including white, grey, black, Golden Oak and Rosewood-style options. Different internal and external colours may also be available.
Yes. Decorative options may include Georgian bars, leaded glass, patterned glazing and obscure privacy glass. These features can be added to complement the property or increase privacy in selected sections.
The price depends on the window size, number of sections, frame finish, glazing, opening configuration and installation requirements. The condition of the existing roof, base and supports can also affect the cost. The uPVC Company offers free quotations across Central Scotland.
The uPVC Company supplies made-to-measure bow and bay windows with energy-efficient glazing, secure locking and a wide choice of finishes. The company installs across Central Scotland and can supply windows throughout the UK. Its experience helps ensure each window is correctly designed, surveyed and fitted.

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Furniture

White Suite
Black Suite
Gold Suite
Chrome Suite
Satin Chrome Suite
Door Chains
Door Numerals

Security

Every UPVC Company door is packed with security features. That means you get even more peace of mind that your home is well protected against burglars.

Accessories

Having chosen the style of door that’s right for your home, you’ll want to add all the right accessories too.

Our extensive range of elegant and practical door furniture has been specially designed to enhance the style and performance of your double glazed door.

Colour Range

Black
Grey
Red
Blue
Green
Irish Oak
Golden Oak
White Grain
Rosewood
Black Cherry
Chartwell Green