Bow & Bay Windows

A Bow or Bay Window is the perfect way to open up a home, letting in lots of light and to allow for more space. We use the Profile 22 Optima system to manufacture our uPVC windows. Several window styles can be used in the window, so your customer can get a perfect fit for their home. The modern uPVC profile ensures these bow & bay windows uphold an impressive degree of structural integrity, offering a highly impressive lifespan to the homeowner. Bow windows have typically four or five panels structured on shallow angles. Bay windows have three panels, creating a dramatic angular curve.

Reducing Energy Bills

By using the Optima range, our bow & bay windows can provide U-values as low as 0.9 W/m2K & WER Values of A+.

Meeting Standards

The profile is manufactured, tested & accredited to British & European standards, meeting all requirements.

Slim Frame

The slim frame allows for a larger glazing area, lighting up the property & providing panoramic views of the outside.


These windows have a 10mm cover on weatherseals, making water ingress & cold draughts problems of the past.

Low Maintenance

These windows require an occasional wipe with a damp cloth to look good-as-new. The colour won't ever fade.

Seamless Weld

Our Graf SLS Seamless Welder delivers an almost invisible join on foils. This technology offers homeowners a stunning finish.

Colour Options

Glass Options

white chartwell-green dark-red brilliant-blue Steel-Blue agate-grey
autumn casement-autumn-cutout casement-chantilly-cutout casement-charcoal-sticks-cutout casement-contora-cutout casement-cotswold-cutout casement-digital-cutout casement-everglade-cutout casement-flemish-cutout casement-florielle-cutout casement-mayflower-cutout casement-minster-cutout casement-oak-cutout casement-pelerine-cutout casement-stippolyte-cutout casement-sycamore-cutout casement-taffeta-cutout casement-warwick-cutout

Bow & Bay Window FAQ's

Here are some answers to the frequently asked questions we receive regarding our Bow & Bay Windows.

1 - Can the Colour be Customised?

Yes, we offer our bow and bay windows in 15 in-stock colours as well as foil and woodgrain finishes. This means this window can be matched to the style & decor of any property.

2 - Is the Glazing Customisable?

Yes! We offer double & triple glazing, as well as a variety of glass options, so this window can truly be shaped to meet the homeowner's standards.

3 - Is This Window Secure?

The Bow & Bay window uses the Optima system which meets the highest standards of security. The window is fitted with a high-security multi-point locking system. It's also internally glazed, preventing the window from being removed from the outside. The uPVC profile itself is durable and strong, standing strong against uninvited visitors. It can be further reinforced with thermal inserts, aluminium and/or steel.

What Is a Bow & Bay Window?

If you’re a homeowner wondering what a bow & bay window is, we’ve got you sorted! Bow & Bay windows are easy to get confused and, in fact, are two types of window that aren’t that alike.  A bay window traditionally consists of three glass panels and protrudes away from the house. A bow window traditionally is made up of four or five identical windows, fitted at an angle of 10 degrees.

Bow & Bay windows are popular in small and medium sized properties, opening up the living space and flooding the property with light. Both windows provide you with more of a view of outside your home, letting the maximum amount of light enter your property. Within the design, you can incorporate other styles such as the casement, flush casement, French casement, tilt & turn and sliding sash window. 

Bow & Bay Windows

uPVC Bow & Bay Window Benefits

Easy Clean Fire Egress Hinges

Lipped slider for enhanced smooth operation. Easy friction adjustment without metal to metal contact. Restricted hinge options available to protect the most vulnerable.

Stainless Steel Friction Stays
Stainless Steel Friction Stays

Available in ferritic 430 or austenitic 304 stainless steel for enhanced corrosion resistance. Durable and weather resistant, tested to 30,000 open cycles.

Customisable Handle Options
Customisable Handle Options

Guaranteed for 10 years, available in various colours to complement any window style. Our austenitic 304 stainless steel ergonomic handles are rust resistant.

Multi-Point Locking Systems
Multi-Point Locking Systems

Maximum security multi-point locking systems provide enhanced protection against forced entry. Additional dog bolts improve stability around the entire frame and prevent attack on the hinge side of the window.

Trickle Vents
Trickle Vents

Available in uPVC and aluminium, in a range of colours to match any frame (vent in frame head only for flush casement). Provided loose to prevent damage in transit. Complies with latest building regulations.

Accredited Weather Performance
Accredited Weather Performance

Superior weather sealing and draught proofing performance, conforming to the exacting standards of the BS-36751 accreditation.

Docking System Bolt
Docking System Bolt

Patented bolt into the keep docking system prevents sideways movement of the bolt when under attack.

Shootbolt Locks
Superior Shoot Bolt

Heavy duty bolt has up to 300 per cent greater contact area against competitor shoot bolts.

Durable Hardware
Durable Hardware

Resistant to salt and spray (BSEN1670) and cycle tested over 50,000 times for ultimate long term performance.

Choice of Profile Options

Profile 22 Chamfered Windows

Chamfered detailing features a more contemporary and simpler bevelled edge, with straight sightlines.

Profile 22 Scultpured Windows

Sculptured detailing offers a more traditional decorative finish replicating the curves found on traditional timber windows.

Profile 22 Flush Windows
Flush Sash

Featuring a dedicated slimline window sash flush within the outer frame, recreating a period aesthetic.

uPVC Bow & Bay Window Handle Options

White Window Handle
Satin Window Handle
Chrome Window Handle
Gold Window Handle
Black Window Handle

Flush fitting push button


Key locking

Push to Release

Locking mechanisms


Sculptured cranked handle available in both left hand and right hand variants

Corrosion Resistant

Tested to BSEN1690 grade 5 salt and ammonia attack

Colour Coded

Push button and screw
cover cap

Bow & Bay Windows Video

View how our Bow & Bay Windows are manufactured in this video. As an Emplas approved installer, you'll be able to use customised versions of these videos and more on your own site.

Bow & Bay Windows Brochure

By becoming an Emplas approved installer, you have access to our range of brochures which includes the “Complete Collection” highlighting the features and benefits of our Optima Window range.


70mm Framing System


Optional Sash Central Seal


5 Chamber Sash


10mm Cover on Weatherseals


U-values of 0.9W/m2K WERS


Chamfered or Sculptured Design


6 Chamber Outer Frame


Multiple Foil and Colour Options


Optional Outer Frame Centre Seal


Triple Glazing Panes Up To 44mm


Optional RCM Thermal Inserts


SAC Multi-Point Locking System

Latest News

Emplas commits to £1 million plus investment in new IGU line

Emplas commits to £1 million plus investment in new IGU line

July 1, 2022
Emplas has placed an order for a £1million plus state-of-the-art Forel Vertical IGU-line...
Read More
What are the benefits of becoming an Emplas Installer?

What are the benefits of becoming an Emplas Installer?

May 4, 2022
The Reality of The Market The market has changed significantly in the home improvement industry...
Read More

Are you looking for help with EVA or Online Ordering?

Click here to open the Emplas Team Viewer so that we can help you with your query. This will open a download link to our dedicated Team Viewer profile.

Emplas Team Viewer

Call Us

Get Directions

Chat to Us