Skip to content
NorthwestWindow Co.
Converted stone barn with a tall arched window in anthracite grey frames

Windows

Shaped and bespoke windows

Arches, circles, gables and angles. If the opening is not a rectangle, we will make a window that fits it properly.

Windows

Made for the opening you have

Chapel conversions, barn gables, porch arches, stair windows that follow the pitch of a roof: some of the most characterful openings in a building are also the hardest to glaze. Shaped frames are bent or mitred to follow the masonry exactly, so there is no need for clumsy infill panels.

Because we manufacture in-house, an unusual shape is simply a more interesting day in the factory. We template awkward openings on site and build the frame to match.

Templated on site

Irregular arches and angles are measured and templated so the frame follows the opening.

Curves and angles

True arches, half rounds, circles, triangles, trapezoids and raked heads.

Matched to the rest

The same colours, glass and hardware as your other windows.

No weak spots

Shaped frames use the same A-rated glazing as our standard windows.

What we can make

Most shapes fall into a few families. Arched windows have a curved head on straight sides. Gable or raked windows follow the slope of a roof. Circles and ovals are usually fixed lights, though some can be made to open. Triangles and trapezoids fill the spaces that standard frames leave behind.

Shapes can be combined with ordinary casements below, so a tall arched opening might have opening sashes at the bottom and a fixed curved light above.

  • Arched and gothic heads
  • Full circles and half rounds
  • Gable-end and raked frames
  • Triangles and trapezoids
  • Georgian, astragal and leaded designs

Specification

The details, in full

Typical specification. We confirm the exact details for your order on the quotation.

Shaped and bespoke windows specification
MaterialsuPVC (Eurocell Eurologik 70mm) or aluminium, depending on shape and size
ShapesArches, circles, half rounds, raked heads, triangles and trapezoids
GlazingDouble glazing as standard; toughened, laminated and obscure glass available
ColoursSubject to shape; most finishes are available on curved frames
Lead timeLonger than standard frames; confirmed with your quote
Guarantee10 years on frames, 5 years on sealed units, 2 years on hardware

Questions

Good things to ask

Straight answers to the questions we hear most about this product.

Can shaped windows open?

Some can. Arched-head casements and raked frames often include opening sashes. True circles and tight curves are usually fixed. We will show you the options for your particular opening.

Do shaped windows cost more?

Yes. Bending or mitring profile and cutting shaped glass takes more time and skill than a rectangular frame, and each one is a one-off. We will give you a fixed price before any work begins.

How do you measure an irregular opening?

For anything that is not a true geometric shape we make a physical template on site. The frame is then built to the template, which removes the guesswork from old and uneven masonry.

Get a price for shaped and bespoke windows

Tell us what you have in mind and we will come back with a clear, itemised quote. No pressure and no sales visit you did not ask for.