How to order made-to-measure windows and doors
Planning and order approval
A made-to-measure order is not decided only in the shopping basket; it sits at the meeting point of site measurement, design and installation. A window may fit its opening yet still cause problems if the sash hits a parapet, its divisions do not suit the façade, or the connection to insulation, sill and reveal remains unresolved. Doors also involve circulation space, thresholds, handles and the transition outdoors. Describe every element as part of the complete plan before comparing individual options. This guide explains which information should be available, how to read drawings and which questions reveal outstanding decisions before a binding order approval.
Start with an element schedule, not individual wishes
The most reliable starting point is an element schedule for the entire project. Give every window and door a clear reference, such as W-01 or T-03, along with its room, façade position and intended purpose. Add approximate size, operating type, opening direction, required internal and external view, and details such as glazing bars, fanlights or sidelights. This quickly shows when a room has two openings but only one is actually intended for ventilation. The schedule also prevents equal sizes being treated too quickly as identical products when their use or design requirements differ.
Do not compare options only as isolated elements. A single inward-opening window may suit a room if the sash has enough clear space inside; as a single inward-opening window it still belongs in a plan that considers the sill, curtains, radiator and furniture. Record what stands in front of the window and who will operate it. In a renovation, also note which existing conditions will remain unchanged. A clear schedule later becomes a checklist for the quotation, drawings, delivery and installation meeting, rather than simply an informal wish list.
Record measurements clearly and name reference levels
For bespoke elements, giving width by height is not enough. First establish whether the figure means a structural opening, a finished opening or the desired outside dimension of the element. Measure openings in several places: width at top, centre and bottom, and height at left, centre and right. Note variations, the condition of the reveal and obstacles such as projecting masonry, services or uneven surfaces. For every measurement, record the surfaces between which it was taken. Add the date and construction stage, as plaster, linings or removed old components can alter the reference edge. Where openings are visibly distorted, check diagonals too; do not assume parallel edges or square corners. Photos showing the element reference and a visible scale help resolve later questions between site, design and ordering.
The order size is not automatically the smallest measured value. Space is needed between the component and the structure for a professionally planned connection, and this detail affects the final size and position. Agree the appropriate specification with the person responsible for installation. Clarify the height in particular: does it relate to the current structural floor or the later finished floor level? With a door, just a few millimetres of floor build-up can determine whether the sash moves freely and how the external transition works. Never transfer measurements from old documents to a new order without checking them.
The opening within the whole project
Read views before fixing opening directions
Opening direction is a design decision, not merely a product label. First establish from which viewpoint the view is shown. Then mark the hinge side, sweep path and handle position for every moving element. Check the drawing against the floor plan and façade elevation: a sash must neither obstruct a route nor collide with furniture, sanitary fittings, radiators or another sash. Outward-opening elements also need their swing area checked against a patio, railing, planters or solar shading. When asking questions, use a marked sketch showing inside and outside rather than terms such as “left-hinged” where the viewpoint is unclear. A scaled opening arc also shows whether the handle and sash edge remain reachable in daily use. The same principle applies to upper-storey windows, where obstacles outside may not be obvious at first glance.
For high-level or difficult-to-reach openings, another operating type may be more suitable than a standard side-hung sash. An outward-opening top-hung casement window is one specific alternative: it opens outwards, but its use must still suit installation height and accessibility. Ask of every opening: who will open it, how often and for what purpose? Ventilation, cleaning, an escape-route strategy and access outside are different uses and should not be answered with the same standard assumption. For project-specific requirements, a qualified professional should assess the design within the overall scheme.
Choose window types by use, not only façade appearance
An attractive façade rhythm matters, but it does not replace functional planning. First decide which openings genuinely need to move. In rooms with several windows, combining an opening unit with a fixed-glazed element can provide the required daylight and view with fewer operating points. A fixed-glazed window is an option where no opening function is required. Check first, however, how the outside face will be reached and what role the opening has in the room climate and ventilation strategy. Consider future cleaning too: a pane inaccessible from outside may need a different arrangement from ground-floor glazing. Fixed glazing is not a universal substitute for an opening window.
For large openings, sash arrangement changes both the appearance and everyday use. Two sashes can create a wide opening, but bring a central division and two swing zones. One sash has a different visual effect and needs different space when opened. On a symmetrical façade, assess axes, sill heights and visible frame lines in a full elevation, not on an isolated product image. Lay recurring windows beside one another as well: differently placed handles, transoms or fixed lights can disturb the intended order even where each element looks plausible alone. Compare interior and exterior views too; a division desired outside may affect the view or furnishing inside. The window type is properly selected only when operation, cleaning, daylight and façade order work together.
Plan doors as transitions between two finished levels
An external door links not only two rooms or an interior to the garden, but several trades and finishes. Before selection, coordinate the levels of the internal floor, outdoor paving, waterproofing, drainage and any canopy. Draw the operating area on both sides. Include furniture, railings, steps, bicycle spaces and paths. An outward-opening door needs clear space outside; an inward-opening door uses internal space. With a single outward-opening patio door the chosen opening direction must therefore work for both the patio and the interior. The product name does not replace a check of the actual surroundings.
The door view also requires specific decisions. Set the hinge side, handle side, desired glazed areas and relationship to adjacent windows. At a front entrance, a sidelight, fanlight or solid panel can substantially change the entrance proportions. Ask not only whether a door fits the opening, but whether it remains comfortable to use when open and whether visitors can reach the handle intuitively. Resolve the threshold together with the connection design, rather than treating it only after choosing the door leaf. Where accessibility, safety or other project-specific requirements apply, the responsible designer or specialist should establish the suitable solution for the actual site.
Compare sliding and folding doors around daily routines
Wide garden openings can tempt you to focus only on clear passage width. More important is how the element will be opened, closed and furnished around every day. A sliding door needs no sash swing space, but has fixed and moving sections that must be considered in the view and in use. Check which side should contain the moving part, where the handle remains accessible and how curtains, solar shading or furniture will be arranged. A Patio Life lift-and-slide door is a sliding-door option; select its specific configuration according to the intended opening side and desired connection between spaces.
Folding doors create a different opening character because several panels move to one side when opened. The folded panels need a defined parking space, and their operation differs from a sliding door. Outward-opening folding doors can be an alternative when the outdoor area provides the required movement space and the internal floor should remain as clear as possible. Before approval, establish for both systems where divisions sit when closed and which opening situation occurs most often: briefly open for ventilation, half open for daily use, or wide open to link to the outdoors. This answer affects the sensible sash or sliding arrangement more than a single façade photograph.
The opening within the whole project
Consider glazing as light, view and room comfort together
Discuss glazing room by room and façade by façade, rather than as one decision for the entire home. Consider the importance of daylight, visibility, privacy, summer solar gain and the outward view in each case. A bathroom, workspace and living room may have different priorities. The position of neighbouring buildings, trees, canopies and planned curtains also belongs in the assessment. State the intended effect precisely: an unobstructed seated view, more screening at standing height, light in a passage or a visual connection to the garden. This lets designers and suppliers see which characteristics are non-negotiable and which are preferences.
For unusual shapes, the drawing is especially important. A fixed-glazed triangular or raked window can complete a roof or gable area visually, but raises different questions from a standard rectangular window: where are the visible edges, how does the shape meet adjoining components, and how will the outer face be reached? Coordinate glazing with planned solar shading and interior design before approving dimensions and divisions. If technical performance values are important for your project, request documentation clearly assigned to the selected element. Compare like reference values and the same configuration, rather than comparing figures from different options without context.
Check finishes, colours and glazing bars in the full view
Colour and finish are often chosen too late, although they strongly affect the appearance of a frame, door panel and division. Create a coordinated overview of all visible elements: windows, entrance and patio doors, sidelights and, where relevant, gates or façade cladding. Record whether the same treatment is wanted inside and outside. View samples and drawings in daylight beside the intended wall, floor or façade materials. A choice that convinces on one small sample can look different across a broad window front. In existing buildings, also consider which elements remain visible and how new frame lines will appear beside them.
Use terms accurately: glazing bars are decorative or structural divisions; through-glazing bars actually divide the glass. This affects the appearance and should be described clearly in both drawing and order. Historically styled windows are therefore not simply a colour variation. A historic-style outward-opening “Kombi” casement window should be coordinated with the other elements in its sash division, opening type and façade view. Check the effect from a normal viewing distance, not only in an enlarged detail. If design requirements from a planning authority or another responsible body may apply, have their relevance to the particular project clarified professionally before approval.
Actively check drawings as the contractual basis
The approval drawing is the point at which wishes become a verifiable specification. Check every element reference against your schedule and do not read only the overall view. Are width and height correct? Is the view labelled as internal or external? Are hinges, handles and moving sashes on the intended side? Are fixed lights, mullions, transoms, glazing bars and glass areas drawn correctly? For doors, also check the threshold, movement direction and relationship with adjoining components. Mark unclear points directly on the document and have them corrected in writing. A verbal reminder is not a substitute for a corrected, unambiguous drawing.
Also check interfaces not visible in the window drawing alone. These include shutter or solar-shading boxes, sills, internal reveals, façade insulation, waterproofing and electrical connections for planned operators. For example, a single-piece glazed door sidelight must be checked for its position relative to the door leaf and the complete entrance opening; the product title alone says nothing about the remaining connection or design planning. Have dimensions and reference heights in plans, sections and elevations checked against one another. Changes after drawing approval can increase work and coordination. Approve only when open points have been answered and corrected documents show the design actually required.
Complete approval with a site check
Shortly before approval, it is worth comparing order documents and the site together. Check whether openings have changed since measurement, whether floor build-ups are final and whether new services, linings or external elements have been added. Work through every element: reference, position, dimensions, opening direction, divisions, finish and special details. For large deliveries, a table with columns for checked, open and confirmed is useful. It makes clear whether a decision is being resolved by the client, designer or installer. It is especially important that everyone works from the same current drawing revision.
Before ordering, also clarify the process after approval. Bloomcabin states a five-year guarantee for windows and doors. Delivery is stated as four to six weeks, subject to order confirmation. Do not plan this period in isolation: consider construction progress, storage space, access, installation sequence and protection of completed finishes. Record who will check quantities, visible damage and element references on delivery. A complete approval file with the element schedule, confirmed drawings, colour decisions and relevant contacts makes handover to the site much easier. The best time for questions is before the binding order, not on delivery day.
Frequently asked questions
Who should be responsible for measuring bespoke windows and doors?
That depends on the agreed project process. What matters is clearly naming who measures, which reference levels apply and who confirms dimensions before ordering. Coordinate the structural opening, planned connection and finished floor level with the professional responsible for design and installation. Documented measurements and photos help prevent later identification errors.
What else should I check for an outward-opening door?
Check the complete swing area outside as well as operation from inside. The patio, steps, railing, furniture, plants and solar shading must not hinder use. At the same time, the door must remain sensibly accessible indoors. Set hinge and handle sides from a labelled view, not from a verbal description alone.
Can opening and fixed-glazed windows be combined in one façade?
Yes, provided the combination suits the intended use. First establish which openings are needed for ventilation or operation and how the outside faces will remain accessible. Then coordinate views, frame lines and divisions together. Do not select fixed glazing without considering the consequences for use and cleaning.
Which documents should I keep before approval?
Useful records include an element schedule, measurement notes, photos of openings, current floor plans and elevations, approval drawings, finish and glazing decisions, and recorded answers to open questions. Keep only the current, clearly dated drawing revision as the working basis. This makes later questions traceable to a clear decision.
When should I not approve an order?
Wait if dimensions are only estimated, the finished floor level is still unknown, opening directions have not been checked in plan and elevation, or connections remain unresolved. The same applies to conflicting drawings and unconfirmed special requirements. Only complete, understandable documentation suited to construction progress provides a dependable approval.
Next step
Made-to-measure windows and doors become a reliable order when every decision is checked in its future location. Start with a complete element schedule, distinguish measured values from order sizes, and always read views with the floor plan and façade elevation. Coordinate doors with floors, outdoor finishes and circulation areas; for large openings, assess daily operation rather than appearance alone. The approval drawing deserves careful checking because it brings dimensions, divisions and opening directions together in a binding form. If questions about connections, technical requirements or local rules remain open, have the responsible qualified professionals resolve them before ordering.
