Order renovation windows and doors at the right time
Planning a renovation
During a renovation, windows and doors are often ordered only once interior work is visibly under way. That is usually too late: façade insulation, new floor build-ups, waterproofing, electrical planning or intended use of the patio may already dictate key decisions. There is no single calendar date for ordering; the sensible point comes after interface planning is complete and before work begins that depends on frame position and opening dimensions. Confirm existing openings, future wall and floor levels, opening directions and installation details first, then release the order with confidence. Allow 4 to 6 weeks for delivery from order confirmation. Also allow time for measuring, questions, coordination and a possible installation date.
Set the order date from the construction programme
Do not begin by asking, “How many weeks ahead?” Instead, work backwards from installation. Before fitting, openings must be accessible, structural or damaged areas resolved, and junctions to the wall, waterproofing and any insulation planned. Internal reveals, sills, plastering, façade work and floor junctions commonly follow installation. Each can affect the required frame position. For every element, note which work must finish first and what depends on it afterwards. This turns a general delivery window into a specific ordering period for your project.
A full renovation often follows a different rhythm from replacing individual windows. If roof, façade and interiors are completed in sequence, one combined order may simplify coordination but can also mean longer on-site storage. For phased renovation, separate deliveries may make sense if dimensions, appearance and the junction strategy remain consistent through all stages. Check whether the home remains occupied, which rooms need to be weather-tight first and whether temporary weather protection is planned. The right time has arrived when later decisions can no longer affect the frames already ordered.
Finalise site measurements only after key structural work
An ordering dimension is more than the width and height of an old opening. Uneven surfaces, existing rebates, lintels, parapets, reveal depths and any removal or addition of masonry also matter. In renovation work, uncovered damage, new levelling layers or altered façade layers can change the situation. Decide who measures, which finished or firmly defined surfaces are used as references, and who approves the dimensions. Photos with a tape measure, room and façade views, and a clear element number help connect later questions to a particular item. Measure critical openings in several places and record variations instead of noting only an average. For out-of-square openings, diagonals and visible misalignment can also be important for professional assessment. The responsible person should then derive the ordering dimension from site information and the intended installation concept. This keeps it clear whether a figure was measured directly, set in the design or confirmed as a manufacturing dimension.
Do not wait for every cosmetic finishing task. What matters is that the structural opening, planned wall build-up and reference levels are fixed. If a new internal floor build-up is planned, the eventual finished floor height must be known for patio and external doors. Where external insulation is added, the team needs a shared understanding of where the frame sits relative to the insulation layer and how the reveal will be formed. Measuring before these decisions are settled shifts the risk to the building site rather than the manufacturer. At the site measure, ask directly: which dimensions record existing conditions, which are design dimensions, and which may no longer change?
See the whole opening
Decide frame position and wall build-up together
Frame position determines how a window or door sits between the interior, structural wall and outer face. It is not merely an installation detail: it affects reveal depths, sills, shading, waterproofing and façade junctions. With a wall receiving new external insulation, looking only at today’s outer edge is not enough. Draw the whole build-up in a simple section: existing wall, possible levelling layers, insulation, internal plaster, external finish and the intended frame and sash position. The sketch need not be a construction drawing, but it exposes unresolved choices early. Add internal and external sills, existing shutter boxes or planned shading where these touch the element. Mark which layers remain and which are new. One section for a typical opening is sufficient only if the other openings genuinely share the same build-up. Plinths, bay windows, extensions or later-added wall sections may need different details. Record these exceptions in the element schedule before applying one dimension system across the building without checking.
Coordination at trade interfaces is especially important. The window installer needs information about the opening and installation plane; façade and waterproofing work needs the frame geometry and junction concept; interior trades must know where reveals and sills finish. A deep reveal can change operation, cleaning and shading compared with a more flush position. Have the final junction design planned by the professionals responsible for the project. Before ordering, you should be able to answer: where is the finished internal face, where is the finished external face, which layer meets the frame, and who is responsible for each transition?
Test opening types in the room before ordering
A window may fit dimensionally yet still cause daily inconvenience. Check opening direction and sash movement against the actual room plan: will there later be furniture, kitchen units, a radiator, basin or curtains? Can the handle and hardware be reached easily? With inward-opening elements, the clear swing area inside matters; with outward-opening versions, it is the space in front. A single-sash inward-opening window can be a suitable option when the planned interior leaves enough room to move. The product name describes the opening direction, not an automatic solution for every installation. Also state clearly from which viewpoint left and right are described. A small cardboard model or a sash arc marked on the floor makes conflicts clearer than an isolated dimension. Check whether an open sash will strike a deep reveal, the handle of an adjacent window or planned internal lining. Where several windows share a room, their operation should be consistent and understandable from future use.
For living spaces, consider ventilation habits. Will the window be opened only briefly for airing, or regularly opened wide for cleaning or access? In a bathroom or utility room, privacy, service locations and operating height may also matter. For a small high-level opening, an top-hung outward-opening awning window may be considered if its opening method suits the design. Draw the sashes as arcs on the floor plan and mark conflicts with furniture. Carry out this simple check before approving the quotation, not only at installation.
Coordinate doors with floor levels, use and furniture
External and patio doors connect several levels: internal floor, threshold, external paving, drainage and the everyday route through the space. If a new screed, floor finish or patio build-up is planned, do not order the door solely from current heights. Show all levels on one drawing and identify the future top of finished floor. Also decide which way the door opens and whether an open sash restricts routes, furniture, planters or patio access. A later change to the external surface is not a minor alteration if it affects the door junction.
For a connection between living space and patio, a single-sash inward-opening patio door can be an alternative where the internal swing area remains clear. If the outside area should be easier to use with the leaves open, another opening direction or a sliding solution may suit the plan better. Do not decide from the façade elevation alone. Test the route in daily situations: carrying a tray, moving outdoor furniture, parking a pram or entering in rain. When ordering, ask which dimensions refer to the frame, opening and clear passage so planning does not use inconsistent measurement terms.
Treat large glazed openings as their own planning package
Wide openings to a garden or balcony require earlier decisions than a standard window because they more often affect structure, façade layout, shading and floor junctions. First check what opening width is actually available and whether construction above or beside it will change. Then consider use: is the priority daylight, a passage or a wide opening to the outside? A Patio Life lift-and-slide door is a lift-and-slide configuration; whether it suits your wall build-up and intended use can only be decided from dimensions, junctions and coordinated planning. Do not choose large glazed areas after structural decisions are already complete.
The installation route also deserves its own point in the programme. Large elements must be able to reach their fitting location. Site access, passages through the building, working space and the sequence of other trades can therefore affect the installation date. Confirm with the installation team when the opening must be ready, how the area will be protected and which work should pause during fitting. Shading is another important issue: its fixing and guides should be planned with the façade, rather than after the window order. Finalise larger elements only after structure, opening size, frame position, floor heights and operating concept have been checked together.
See the whole opening
Decide special shapes and heritage-style elevations early
For round, triangular or angled openings, accurate site measurements are particularly important because shape, radii, angles and reference points must be specified unambiguously. A fixed-glazed triangular and angled window is intended for corresponding non-rectangular openings, but its name does not replace checking the actual geometry. Record not only overall width and height, but every relevant corner point and the orientation in elevation. Supply drawings with an element number, internal and external sides, and a clearly identified top edge. This helps prevent two parties from interpreting the same shape as mirror images.
Glazing bars, sash divisions and profile views also affect when approval can be given. In planning, distinguish between applied glazing bars and bars that divide the glass: the appearance may be similar, but the construction is described differently. For existing buildings, discuss the desired façade appearance using photographs, elevations and comparable elements. A heritage-style “Kombi” casement window, outward-opening can be included in a design brief when the stated opening direction and heritage appearance are required. Record design requirements in writing before manufacturing documents are released; later changes to divisions or special forms can materially affect the programme.
Choose fixed, opening and combined panels deliberately
Not every glazed area needs to open. Fixed glazing can work well where the view and daylight take priority and ventilation is provided through other openings. A fixed-glazed window is therefore an alternative to an opening window, not an equivalent replacement. Consider separately for each room how it will be ventilated, cleaned and reached when needed. In a combination of fixed and opening panels, establish early which panel performs which task. This affects sash divisions, handle position, façade appearance and everyday operation. View the interior and exterior separately: a balanced division outside may put a frame mullion exactly where a clear internal sightline is wanted. Conversely, a layout developed only from the interior may appear unsettled on the façade. On an elevation, mark not only structural openings but fixed panels, sash lines and opening directions. Then check from which safe, practically accessible position the outside faces can be cleaned. If no workable method is evident, reconsider the panel layout before ordering.
Make this choice before releasing the order because it rarely has no consequences for dimensions and elevations. A wide fixed panel can create a calmer glass appearance; an operating sash offers usability but needs space to open and changes the division. Ask the question through a typical day: where will you ventilate in the morning, where do you want to go outside, where must cleaning take place and which area remains permanently obstructed? Coordinate the choice with planned shading too. If an element is made openable only for visual reasons although it has no useful purpose, it often creates complexity without a clear benefit.
Prepare the order as a complete approval document
A reliable order is more than a list of widths and heights. Create an element schedule with identification, room, elevation, opening direction, number of sashes, required divisions and specific junction notes. Add photographs of the existing opening and a façade elevation where the external appearance matters. For doors, include hinge side, direction of movement and planned finished-floor height in the same document. For the main entrance, an outward-opening entrance door with infill panel may be considered if its defined opening direction suits the approach and area in front. Do not confirm details that are only assumed.
Before release, a brief review by everyone with an interface is worthwhile. The designer can compare dimensions and wall build-up, the installation team can assess fitting conditions, and you can review use and appearance. Ask for terms in the quotation to be explained if they are unclear: are dimensions frame or opening sizes? Which side counts as inside? Which side is designated as the hinge side? Which hardware, handles or divisions are included? Keep the finally approved version with the site-measure records. This documentation makes questions easier to resolve, especially where other work happens between ordering and installation.
Build contingency for decisions and installation, not uncertainty
The stated 4 to 6 week delivery time begins after order confirmation and does not replace project contingency. Between the first discussion and confirmation, there may be site measuring, quotation review, technical questions and coordination with other trades. Afterwards, a date must be found when openings are ready, the site is accessible and junction work is organised. Allow contingency before the intended installation day. It should not be used to somehow absorb unresolved dimensions later, but to protect against genuine dependencies. A properly resolved decision stage is more valuable than an especially early order followed by change requests. Set separate milestones in the programme for measurement readiness, technical approval, order confirmation, expected delivery window and installation readiness. This shows whether a missing façade section blocks the order or affects only later work. Agree binding fit-out and installation dates only from the confirmed order status. Working back solely from a hoped-for move-in date can overlook that decisions before delivery also require time and confirmation from several people.
A final site check shortly before installation is practical: are openings clear of scaffold parts and stored materials? Have floor heights, façade build-up or reveals changed since the site measure? Is it clear who may make decisions during fitting? After installation, schedule follow-on work such as internal finishes and external junctions promptly so transitions do not remain exposed or unresolved for long. Bloomcabin provides a 5-year commercial warranty for windows and doors, subject to its terms. It is separate from any remedies that may apply under New Zealand consumer law. This warranty does not remove the need to coordinate selection, measurements and project-specific junctions carefully in advance. If anything is unclear, a short professional discussion before ordering is usually a better next step than rushed approval.
Frequently asked questions
How early should I order windows for a renovation?
Order once openings have been measured on site, wall and floor build-ups fixed, and opening directions and junctions agreed. Delivery takes 4 to 6 weeks from order confirmation. Also allow time for measuring, quotation review, questions and coordinating the installation date.
Can I request a quotation before the final site measure?
Yes, an early enquiry can clarify options and the process. For a binding order, however, distinguish clearly between provisional planning dimensions and confirmed site measurements. Finalise only when the structural opening, future façade plane, internal fit-out and floor heights should no longer change.
Why must new floor finishes be known before ordering a door?
For external and patio doors, the finished internal and external heights affect the transition at the door frame. Screed, floor finish, patio and drainage must therefore be considered together. If these levels are decided only after ordering, they may conflict with the intended installation arrangement.
Should I order windows and doors in one or several deliveries?
That depends on the construction programme. A combined order can simplify appearance and coordination. For a renovation in stages, dividing the order may make sense where openings are completed later. Secure dimensions, protected storage and a firm plan for each installation date are decisive.
What should I check immediately before releasing the order?
Check the element number, dimensions, internal and external sides, opening direction, sash count, divisions, room allocation and relationship to finished floor and wall levels. Also confirm that shading, sills, façade work and internal reveals account for the chosen frame position. Explain unclear terms before approval.
Next step
Windows and doors should not be ordered at the earliest possible point in a renovation, but at the right planning stage: after final site measurements and after wall build-up, floor heights, frame position, opening types and junctions are agreed. Allow 4 to 6 weeks for delivery from order confirmation, plus a realistic coordination buffer. Treat large openings, patio doors and special shapes as separate planning subjects. A clear element schedule, checked drawings and a shared review of interfaces by the relevant professionals make the order traceable and help avoid unnecessary changes during construction.
