Fixed Semicircular Window

Made-to-measure semi-circular fixed glazing

Semi-circular fixed window

This bespoke fixed half-round window combines pine or oak joinery, colour choices, insulating glazing and clearly defined glazing-bar patterns.

Window type

Fixed glazing in a semi-circle

Operation

Non-opening

Frame timber

Pine or oak

Production

Made to measure

01

Everyday use and handling

No part of the glazed half-round unit is operable. Day to day, it therefore stays in one position rather than switching between opened and closed states. Within a design, it contributes a permanently enclosed pane and the recognisable semi-circle. If the same elevation also needs ventilation or a usable passage, assign that requirement to another purpose-chosen component. The curved unit continues to function solely as fixed glass. This division is especially helpful where a project combines elements with separate roles: the semi-circle supplies the architectural focus, while a suitable companion window or door provides movement, airflow or entry.

Plan how the glass surfaces will be reached during ordinary care, since the sash cannot be opened. That consideration arises from the proposed position; it is not another feature of the product. For example, a unit set high over other joinery, or somewhere awkward to reach, may require advance thought about safe access to the surfaces that can be cleaned from the building. A lower, readily accessible placement presents a different situation. Above all, classify this as permanent glazing rather than an operable sash, then organise its use and upkeep around that fact.

Bars alter how the unit is perceived, yet its non-opening construction remains unchanged. With no bars, the eye follows the complete curved pane and sharply defined perimeter. Level lines may echo cornices, frame rails or comparable features; upright lines may continue an established facade axis. Using both gives the glass a more articulated character. Before choosing, study nearby apertures and the repeated geometry of the elevation, not only the window in isolation. You can then judge whether the semi-circle should sit quietly within the scheme or stand out as a deliberate focal detail.

02

Construction, part measurements and key data

Use the technical data to compare options and organise the specification. The outer frame has a stated section of 105 × 57 mm. Those figures describe that part alone, rather than the finished unit’s total height and width. A 14 mm size is stated for the mounting holes. CE marking applies, and the commercial guarantee runs for five years. As each unit is produced to order, keep the requested complete-window dimensions and aperture information in a different part of your notes from the frame-section data. That distinction shows which measurements govern the whole item and which concern one component.

Specify either double glazing or triple glazing. Argon is present in each version. Both also use a heat-reflecting surface treatment and a CHR spacer that provides warm-edge detailing. The seals against the glass are silicone. Select the frame material from pine or oak. List timber species, colour, glass build-up and bar arrangement individually in the enquiry. Doing so defines the curved unit precisely, without muddling these choices with aperture measurements or set component data recorded elsewhere.

Regardless of the selected bars, the curved assembly remains permanently glazed into its frame and has no opening action. Use each variant’s exact designation, as the range separates ordinary bars from versions specifically labelled “glass-dividing”. Copy the chosen option wording carefully. In plans and annotated sketches, indicate whether each note applies to the complete window, the frame section, the glass build-up or the bar layout. Organising the information this way makes consultation easier and reduces the risk of reading a decorative line as a part dimension or a different specification.

05

Assessing the intended opening correctly

Since dimensions are tailored for this half-round window, reliable preparation starts by defining the proposed aperture unambiguously. A note such as “round on top” does not necessarily capture enough about a semi-circle. Record the geometry so the straight edge, arc and connection between them can be understood. The right way to gather those details will depend on conditions at the project. Drawings may provide the main reference for new construction; with an existing aperture, clear records and informative views can help document what is already there.

Confirm that the aperture has been prepared for a true semi-circle and that adjacent construction reveals its outline sufficiently. A straight-on photograph by itself may mislead if perspective or an obstruction masks part of the curve. Use a labelled sketch to show the particular edges behind each recorded detail. Where several comparable apertures occur, give each a unique location reference. These steps make the request easier to interpret; they do not alter the geometry offered or stand in for project-specific checking.

Allow for suitable space around the proposed location wherever the surrounding build-up requires it. Cladding, reveals, roof edges and nearby components can affect both the curve’s place in the elevation and the description needed for that position. As there is no moving sash, you need not reserve an opening arc. Even so, locate the permanent glazed unit precisely within its aperture. Keep the structural-opening figures apart from the stated outer-frame part measurements: each set refers to a separate aspect of the work, so using one as a substitute for the other would be incorrect.

06

Coordinating timber, colour and appearance

For the frame, choose pine or oak and add the preferred colour from the offered selection. Record species and finish together because both form part of the configuration. This page does not nominate a default shade; coordinate the choice with the particular scheme. Look beyond the curved unit to the surrounding joinery, doors, external finishes and any other surfaces in view. Careful coordination may let it settle into an existing palette, or deliberately separate it as a contrasting architectural detail.

The curve brings its own emphatic geometry. Finish colour and bar layout can refine that expression without creating another window type. Leaving the pane free of bars draws attention to the perimeter. Level subdivisions can answer other horizontal features, while upright ones can strengthen an axis already evident in the elevation. Where both geometries occur, the crossed arrangement offers another design approach. Treat these as lenses for comparing choices, not assured outcomes: architecture, light and context will influence the final impression.

If the scheme contains other timber doors or windows, establish in advance the visual relationship you want with the curved unit. Repeating a timber species and finish can give the joinery a measured continuity; a deliberate contrast can instead emphasise the semi-circular outline. Enter the species, colour request and exact bar-layout title as separate specification items. Wider photographs or drawings can record existing finishes, materials and geometric cues. They support an intentional composition while keeping aesthetic preferences distinct from the unit’s construction details.

07

Companion opening windows and patio doors

An immovable curved pane fulfils one role; operable joinery fulfils another. Where the elevation calls for a semi-circular glazed feature as well as airflow or passage, use different components for those needs. Elsewhere in the range are outward-operating pivot windows, side-hung casements and top-hung models. They are candidates for positions where daylight must be paired with an opening action. Decide first, location by location, whether permanent glass or a movable sash is called for. You can then match each place with the product designed for that task.

At positions intended to open, assess one-sash and two-sash window versions according to the required arrangement. For a route outdoors, a companion patio door with one leaf can be considered at its own location. Certain windows and doors also offer traditional styling. Assigning each role separately keeps the scheme intelligible: the curved component supplies permanent semi-circular glass, whereas another unit supplies ventilation or passage. Check the published specification and configuration choices for every item in its own right; features belonging to the curved fixed window should not be assumed for companion models.

For a scheme containing several units, draw up a simple position schedule. Identify the location reserved for the permanent curved glazing, then mark every place needing a movable sash or an external-access door. Beside each reference, enter its purpose, intended measurements and appearance choices. Even when all units share one elevation drawing, this method prevents one product’s requirements from being assigned to another. The following links lead to pages for companion window and door types that may cover the remaining positions in the proposal.

Pivot window opening outwards, Top-hung window opening outwards, Single side-hung window opening outwards, Traditional single side-hung window opening outwards, Double side-hung window opening outwards, Traditional double side-hung window opening outwards, Outward-opening patio door, single leaf, Traditional-style outward-opening patio door, single leaf.

08

Prepare a clear, structured product enquiry

Use “Semi-circular fixed window” as the precise product reference. Next, describe its proposed position and say if it will stand alone or form one part of a broader joinery arrangement. That short context communicates the architectural idea without attributing any extra operation to the unit. For a request covering multiple curved windows, assign a plain, unique reference to every aperture. The selections for one location will then remain separate from those made for another.

Then select the timber and record the preferred finish colour. State whether the glass build-up should be double or triple glazing. Choose one listed pattern title and reproduce “glass-dividing” whenever that qualifier belongs to the option. For the uninterrupted treatment, write “Without glazing bars”. Keeping material, finish, glass and bar selection in separate entries avoids an unclear combined instruction. Any reference images should be annotated to explain the particular feature they are showing.

Before sending the request, check that every entry carries the right location reference and that timber, colour, glass build-up and bar layout appear as distinct choices. Mark any unresolved decision openly instead of entering a rough substitute. Labelled plans, sketches or photographs can show the proposed position of the curved unit and identify surrounding lines relevant to its appearance. Maintain separate notes for structural-aperture measurements, the desired finished-window dimensions and the standard measurements of individual parts. Presenting the enquiry in this orderly form gives our team a sound basis for reviewing the configurations offered.

Can the semi-circular window be opened?

No. It is a permanently glazed half-round window with no opening action. Choose it where the curved pane and incoming light are the priority, while ventilation or a usable opening is arranged through another element elsewhere.

What frame timbers can I select?

Select either pine or oak. The choice of species does not alter the core product: it continues to be a permanently glazed semi-circular window. When deciding, take account of existing timber finishes and the overall character intended for the project.

Is a coloured finish available?

Yes. A colour choice is among the available purchasing decisions. As the appropriate effect depends on the building, adjoining components and your design concept, state the required shade clearly in your enquiry.

Is made-to-measure manufacture available?

Yes. Production is tailored to the project dimensions. Give an unambiguous record of the aperture shape and the relevant measurements. For the curved perimeter, use properly identified dimensions and clear drawings rather than an uncertain sketch or approximate figures.

What bar layouts may be specified?

Options include no bars, a level bar, an upright bar, and a layout crossing one in each direction. There is also a named design with the level bar low in the pane. Other variants use one or two glass-dividing lines, set either level or upright. Quote the exact listed title in your request, especially for a glass-dividing selection, so it cannot be confused with a similarly oriented alternative.

How is the insulated glazing constructed?

Choose a double- or triple-glazed insulating unit. Each specification contains argon and a thermally reflective coating, plus warm-edge CHR detailing; silicone provides the glazing seals. In the request, record this choice independently from the timber species, selected colour and chosen bar layout.

Is the semi-circular window CE marked and available with a guarantee?

Yes. CE marking is provided, together with a five-year commercial guarantee.

Which companion product can provide ventilation or access?

Provide the movement or access through another purpose-selected window or patio door. The companion range covers outward-operating pivot windows, side-hung models and top-hung designs, together with patio doors having one leaf; some models have traditional styling. Whichever companion item you add, the semi-circular unit still remains permanently glazed and cannot operate.

Discuss your proposed specification

Considering a bespoke curved window for the project? Tell us the location and the choices already made for timber, colour, glass build-up and bar arrangement. We can set out the applicable configuration clearly, ensuring the request captures both the desired appearance and the key decisions.