A bay window usually combines three sections: a wider centre window with an angled window on each side. A bow window uses a series of similarly sized windows, commonly four or five, to create a gentler curve. Both project beyond the exterior wall. The best choice depends on your opening, the view, ventilation and the installation work involved.
| Feature | Bay window | Bow window |
|---|---|---|
| Typical arrangement | Three sections with a wider centre | Four or five similarly sized sections |
| Exterior shape | Defined angles | A gentler, curved appearance |
| View | Broad centre view with views to each side | View distributed across several sections |
| Ventilation | Operating side windows can flank a fixed centre | Selected sections can be configured to open |
| Quote details | Overall size, side angles, projection and operating sections | Overall size, number of sections, projection and operating sections |
These are typical layouts. Confirm the available arrangement and dimensions for your project before ordering.
Choose a bay if you like a distinct, angular projection and a large centre view. The centre section can be fixed, with operating flankers on either side. The interior may allow a window seat or display ledge, depending on the selected head and seat arrangement and the space available.
Compare Panes bay window options and include a photo of your existing opening when requesting a quote.
Choose a bow if you prefer a softer exterior curve and a view divided across several similar sections. Decide which sections need to open: an all-fixed arrangement and one with operating windows serve different ventilation needs.
Explore Panes bow windows and discuss the number of sections, overall width and projection with the quoting team.
Compare complete quotes for the same opening and scope. The number of sections alone does not determine the final price. Ask each quote to identify:
Changing a flat window to a projecting window can involve different work from replacing an existing bay or bow. A site review is needed to confirm support, roof or overhang details, drainage and any required approvals. A larger opening is not automatically suitable for either style.
Compare the ratings for the complete window configuration. Glass coatings, glazing choice, window size and which sections open all affect performance. Consider the direction the window faces and how the room is used, rather than assuming that one shape is always more efficient. Our glass and coatings guide explains the choices.
It may be possible, but it is not simply a change in the number of panes. The new assembly must suit the opening, projection and support details. Send photos of the interior and exterior, approximate dimensions and your project address so the scope can be reviewed.
Start with our window measuring guides, then send your sizes and photos for a quote. Confirm the final dimensions and installation responsibilities before placing an order. Panes offers supply-only windows for your own contractor; installation availability is confirmed by project address.
You can also compare all Panes window styles if a fixed, casement or sliding window may better suit the opening.