Bloomcabin 1 opening sash without decorative bars. This inward-opening window features one opening sash without decorative bars. With its uninterrupted glazed appearance and single-sash format, it offers a quietly refined solution for homes that favour clean lines over added detailing.
Why choose this Bloomcabin design?
Without decorative bars, the single sash delivers an unfussy glazed appearance that lets the window sit quietly within a carefully designed room or façade.
The inward-opening sash offers a direct, uncomplicated operating arrangement, making this design a natural choice for schemes built around simplicity.
A comfortable, energy-efficient feel is at the heart of this uncomplicated window design.
Ideal for projects favouring a pared-back window treatment and a straightforward inward-opening function. Its single plain sash is especially suited to contemporary interiors, discreet replacements and elevations where clean glazing is the priority. 1 opening sash without decorative bars — Balanced proportions make it easier to coordinate the design with the architecture and the intended appearance of the facade. 1 opening sash without decorative bars — Before configuration, the design can be adapted to the project requirements and the preferred architectural character.
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Configure now Configure this plain-sash window for your project. For help contact our team.
Type: Inward-opening sash with tilt function;
Warranty: 5 years;
CE: Yes;
Material: Pine, pine with aluminium cladding, oak or oak with aluminium cladding;
Glazing: 2- or 3-pane glazing unit with heat-reflective coating, warm-edge spacer (CHR) and argon gas;
Glazing seals: Silicone;
Hardware: Roto Frank;
Mounting holes: 14 mm;
Frame: 78 × 82 mm (90.6 × 82 mm with aluminium cladding);
Sash: 78 × 82 mm (90.6 × 82 mm with aluminium cladding);
Bloomcabin / Windows & Doors
Single-Sash Inward-Opening Window
A made-to-measure single-sash window combining inward opening, tilt ventilation and adaptable glazing-bar designs.
Opening
Inward-opening sash with tilt function
Material
Pine or oak
Cladding
Aluminium-clad versions available
Glazing
Two- or three-pane glazing unit
Our single-sash inward-opening window brings a clear, balanced composition to made-to-measure openings. One glazed sash keeps the elevation orderly and provides straightforward indoor operation, making this format suitable for both contemporary projects and traditional property improvements.
The design can be tailored through timber, aluminium-clad timber, glazing and decorative-bar choices. Its restrained proportions work well as an individual feature or as part of a repeated window arrangement, while the combination of inward opening and tilt operation supports practical everyday use.
01
The window has one opening sash and two operating modes: an inward-opening action and a tilt function. The inward action brings the sash into the room, so you can operate and manage it from indoors. The tilt setting provides a more limited opening for ventilation without requiring the sash to swing fully into the space.
Because the main opening movement is towards the interior, the area immediately in front of the window needs to remain clear. Consider furniture, deep worktops, taps, shelving, ornaments and other fittings that could restrict the sash. Curtains and internal blinds should also be planned so that they do not obstruct the handle or opening path. This clearance only needs to be resolved once in the room layout, but it is an important distinction from an outward-opening window.
A single opening sash creates a direct, intuitive arrangement without a meeting point between two separate opening leaves. It is a useful format where you want regular ventilation, convenient indoor control and access to the internal and external faces of the glass from the room. The tilt function adds flexibility when a smaller ventilation opening is preferable to fully opening the sash.
Opening orientation should be considered alongside how the room will actually be used. Think about your normal approach to the handle, the position of nearby fittings and whether a fully open sash would interrupt a circulation route. These practical checks help the inward-opening window feel integrated into the space rather than treated as an isolated component.
02
Material choices include pine, pine with aluminium cladding, oak and oak with aluminium cladding. Pine and oak provide two different timber directions for the project, while the aluminium-clad versions add cladding to the timber construction. Select the material as a project choice, taking account of the desired interior character, exterior treatment and relationship with surrounding windows and doors.
The frame and sash are each specified at 78 × 82 mm. With aluminium cladding, the corresponding frame and sash specification is 90.6 × 82 mm. These figures are useful when reviewing drawings, reveal conditions and junctions, but the complete opening and installation arrangement should always be planned around the made-to-measure window being ordered.
Silicone glazing seals are used around the glazing, and the operating hardware is by Roto Frank. Together, these components form part of the defined window construction without changing its visually simple one-sash format. Hardware placement should be shown consistently on project schedules so that the intended operation is clear to everyone using the drawings.
The window is CE marked and comes with our five-year warranty. When coordinating several units, keep the selected material and cladding description consistent across quotations, schedules and approval drawings. This helps prevent an unclad timber version and an aluminium-clad version from being treated as interchangeable when their construction dimensions differ.
03
The window is available with either a two-pane or three-pane glazing unit. Both choices include a heat-reflective coating, a warm-edge spacer identified as CHR and argon gas. Silicone glazing seals complete the specified glazing arrangement.
Your choice between two- and three-pane glazing should form part of the wider project specification. Consider how the window will relate to other glazing in the property, the build-up allowed for in the design and the visual consistency required across an elevation. If several window types are being combined, record the selected pane configuration for every opening rather than relying on a general note.
Treat glazing and decorative-bar choices as separate parts of the configuration. Pane count defines whether the unit has two or three panes, while decorative bars determine the visible pattern across the single sash. For grouped elevations, note both selections for each opening so adjacent units can be compared accurately and deliberate differences remain clear.
For grouped or repeated windows, consistency usually creates the calmest result. Aligning the glazing specification across adjacent units avoids accidental variation, while deliberate differences should be clearly labelled on the window schedule. The best selection is the one that fits the requirements of the whole opening rather than being considered only as an isolated pane count.
04
The simplest design is one opening sash without decorative bars. This gives the window one uninterrupted glazed field and emphasises its clean, single-sash geometry. It is a natural starting point for restrained elevations, modern alterations or any project where the view through the window should remain visually open.
Available divided layouts include one horizontal decorative bar or one vertical decorative bar. You can also choose one horizontal and one vertical bar, two horizontal bars with one vertical bar, or three horizontal bars with one vertical bar. Another option combines one horizontal bar with two vertical bars. Each arrangement changes the apparent scale and rhythm of the glazing without turning the window into a multi-sash composition.
Bar selection should respond to the architecture rather than being chosen in isolation. A single horizontal line can reinforce a level already established by nearby joinery, while a vertical line can accentuate height. Crossed arrangements create smaller visual fields and can suit elevations where a more traditional or cottage-influenced expression is desired. Check that bar positions coordinate across neighbouring openings, particularly where heads and sills align.
For a more detailed pattern, the available choices extend to four horizontal decorative bars with one vertical decorative bar. Whichever supported layout you select, the bars describe the glazing design rather than a different opening action: the product remains a single-sash inward-opening window with a tilt function. Record the exact bar pattern on elevations and schedules so repeated windows can be coordinated accurately.
05
Made-to-measure ordering starts with a clearly defined opening reference. Record the opening width and height using a consistent convention, and distinguish between the structural opening, any existing frame and the intended window size. For replacement work, do not assume that an older opening is square or that dimensions taken at one point represent the entire aperture. Multiple measurements help reveal variation that needs to be considered in the fitting plan.
Mounting holes are specified at 14 mm. Their relationship to the surrounding construction, selected fixings and installation method should be resolved for the particular project. The person responsible for fitting should assess the substrate, junctions and support conditions before work begins. This planning advice is especially important in refurbishment, where concealed construction can differ from the visible finishes.
Use drawings to identify the inside and outside faces, finished floor level, sill relationship and any adjacent wall build-up. Include section details where reveals, linings or external finishes could affect the final position. If several openings look similar, assign each one a unique reference and place that reference on both the plan and window schedule.
Allow for the tolerances and perimeter detailing appropriate to the building and installation method. Decisions about structural support, fixings, weathering and interfaces belong in the project-specific fitting design. Before placing an order, compare the proposed window information with the latest site dimensions and construction drawings rather than relying on an early design-stage schedule.
06
A single-sash window has a calm, self-contained appearance that can work alone or repeat across a façade. When several units are visible together, consider the alignment of heads, sills and decorative bars. Repetition can establish a strong rhythm, while intentional changes in size should relate to the proportions of the elevation rather than appearing accidental.
Material choice affects how the window participates in the wider palette. Pine can be coordinated with other softwood elements, while oak can support a different timber character. Aluminium-clad versions provide another exterior expression while retaining timber within the available construction choices. Review samples and project finishes together under the lighting conditions in which they will normally be seen.
Colour decisions should connect the window with both interior and exterior elements. Internally, consider walls, flooring, fitted furniture and other joinery. Externally, compare the proposed treatment with cladding, masonry, roof details, rainwater goods and neighbouring windows. The interior and exterior viewpoints do not need to create the same visual effect, but they should be resolved as parts of one composition.
Handle selection provides a smaller-scale point of coordination. Rather than matching every metal item automatically, decide whether the handle should blend with the window or act as a deliberate accent. Across repeated units, a consistent handle approach generally supports visual order. Record the chosen finish precisely so that informal descriptions such as dark, silver or brass-like do not create ambiguity.
For alterations to older properties, study the spacing and hierarchy of the existing openings before selecting decorative bars. A more detailed bar layout can introduce traditional character, but it should not be used simply to imitate an unrelated style. The strongest result usually comes from respecting the building’s established proportions while making the new window’s operation and configuration clear.
07
Opening direction is one of the first comparison points. This inward-opening window keeps operation on the room side, whereas an outward-opening format moves away from the interior. The right choice depends on the surrounding layout, external conditions and the intended relationship between the opening unit and nearby elements. Compare direction before comparing decorative details, because it has a greater effect on everyday use.
A fixed window is worth considering where an opening function is not required. Fixed and opening units can play different roles within the same composition, so decide which positions need ventilation or access and which are intended primarily as glazed areas. A round fixed window addresses a different architectural purpose again, introducing a distinct shape rather than acting as a direct operational substitute for a rectangular sash.
Combination windows may be more appropriate when a project calls for multiple glazed or opening elements within a coordinated arrangement. Patio doors answer another requirement by providing passage as well as glazing, and outward-opening patio-door formats should be assessed for their own movement and surrounding space. Heritage-style door options can help when the visual language of the elevation is a central consideration.
If your project brief calls for an EI30-classified window, compare the related inward-opening and outward-opening fire-rated formats according to the intended opening action and material specification. For a performance-led brief, the outward-opening Passive House window provides another distinct product route. These alternatives have their own constructions and glazing specifications, so compare them with this standard single-sash window as complete products rather than by appearance alone.
Use the related product choices to compare four fundamental decisions: opening versus fixed glazing, inward versus outward action, an individual sash versus a combination format, and a window versus a passage door. The related links that follow provide a practical route into those alternatives, including fixed, combination, fire-rated, passive-house and patio-door formats. Explore related windows and doors: EI30 Fire-Rated Inward-Opening Window, EI30 Fire-Rated Outward-Opening Pivot Window, Outward-Opening Passive House Window with Super-Low Uw, Kombi Combination Window, Fixed Window (Non-Opening), Round Fixed Window (Non-Opening), Single-Leaf Patio Doors – Outward Opening, Heritage-Style Single-Leaf Patio Doors – Outward Opening.
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A well-prepared enquiry should identify the project, opening reference and quantity for every window. Include the overall size convention, confirm that the schedule calls for this single-sash inward-opening window with tilt function, and state the timber choice, whether aluminium cladding is selected, the pane configuration and the decorative-bar layout. Add your colour and handle preferences where decided, and separate confirmed selections from choices you would still like to compare.
For multiple windows, a schedule is usually clearer than a collection of informal notes. Give each unit a unique mark, such as W01 or W02, and use the same mark on plans and elevations. If identical units repeat, state the quantity explicitly. Where similar windows differ by only one feature, highlight that difference rather than expecting it to be inferred from their locations.
Control drawing versions carefully. Add a date or revision identifier to dimensions, elevations and schedules, and keep superseded versions out of the active approval set. If a change affects one item, check whether aligned windows or repeated bar patterns also need revision. This prevents a local adjustment from disrupting the wider composition.
Before confirming the configuration, review the information from both practical and visual perspectives. Check that the selected version matches the intended room-side operation, that elevations show the correct bar arrangement and that material descriptions remain consistent across all references. Our team can help you compare the available product choices and answer enquiries about the supported configurations.
Configure your single-sash inward-opening window around the needs of your project, or contact us with your window schedule and current selection notes. Clear references and up-to-date drawings give us the best basis for discussing the available choices with you.
Window questions
The main opening action swings the sash into the room and provides a wider opening. The tilt function creates a more limited ventilation opening. Both functions belong to the same single sash, so you can choose the mode that suits how you want to air the room at that time.
Choose pine or oak according to the timber character and wider finish palette you want. Pine with aluminium cladding and oak with aluminium cladding are separate choices that add exterior cladding to the timber construction. Compare the versions using your interior finishes, exterior materials and project drawings.
Treat the pane count as part of the complete project specification. Consider consistency with other windows, the intended construction and any project requirements established by your designer. Both available glazing units include a heat-reflective coating, CHR warm-edge spacer and argon gas.
Yes. One opening sash without decorative bars is an available design. It creates one clear glazed field and the simplest visual treatment. If bars are preferred, several horizontal, vertical and combined layouts are available, so identify the exact pattern on your elevation or schedule.
Yes. The window is available in made-to-measure sizes, with colour and handle choices. Include the opening reference and required size with your enquiry, then indicate your preferred material, cladding, glazing and decorative-bar layout so the colour and handle can be considered as part of the complete configuration.
Provide a unique opening reference, current measurements, photographs or drawings that clarify the opening, and your preferred material, cladding, glazing and bar choices. Distinguish the structural opening from the intended window size and identify which dimensions have been checked on site.
Use an elevation and window schedule to align heads, sills and decorative bars. Apply consistent names for colours, handles, materials and glazing rather than relying on broad visual descriptions. Give any intentionally different unit its own reference so that the variation is clear.
Our single-sash inward-opening window comes with a five-year warranty. Keep your order information, opening references and approved configuration details together so that the particular windows in your project can be identified clearly.
Configure your single-sash inward-opening window or contact our team to compare the available materials, glazing and decorative-bar choices.
