Separate the whole view from its parts
Do not describe the entire bay as one large rectangle. Label its sections A, B and C and identify them on an overall photograph. For a corner window, show where the two walls meet. This sketch supports clear communication rather than producing ordering dimensions. Keep the labels consistent in photographs and messages so that widths, heights and missing information remain attached to the correct section.
Mark which sections open
Record which sections are fixed, which open and in which direction. Show handles and explain whether everyday access to the sill matters. If one side includes a door, identify it separately. Describe where you want the fabric to sit when open. This brings access, sash movement and daily circulation into the conversation instead of judging the proposal only by an attractive closed appearance.
Compare a continuous line with separate coverings
A continuous curtain line and individual coverings create different appearances. The first raises questions about continuity around corners; the second raises questions about separate control. Neither is automatically better for every bay. The suitability of a particular rail or mechanism needs checking at the site. Show the appearance you like without treating a photographed corner detail as a technical solution for an unassessed wall and opening.
Work through a hypothetical bay
Imagine two side sections measuring 70 cm each and a central section measuring 140 cm. These are illustrative figures, not ordering dimensions. Label each part and leave unknown angles explicitly unknown. Adding widths does not establish the finished rail length. Ask separately about folds meeting at corners, clearance for opening sashes and where panels will gather. Those answers need to relate to the actual window configuration.
Include furniture and lighting
Show any sofa, table or bench in relation to the glazing. Include a floor lamp, radiator and projecting sill in the overall view. Leave unknown distances as questions rather than replacing them with confident guesses. Discuss the selected fabric in both open and closed positions around these objects. Do not inspect inaccessible fixings yourself; simply record that this information needs a professional site assessment.
Do not prescribe symmetry too early
A reference picture may show matching sections even though your windows differ in width or use. Avoid prescribing identical fullness, panel numbers and controls for every part before discussing those differences. Explain the overall rhythm you like, then compare it with the labelled sketch. The relationship between finished appearance and fabric quantity depends on the actual dimensions and system. A photograph cannot complete that specification on its own.
Prepare the next enquiry
Describe these details in the enquiry form and prepare photographs for the agreed visit. Distinguish approximate numbers from checked information. If you are deciding between a continuous line and separate coverings, ask for both to be explained against the same needs. The next step is a site review and sample comparison. Until dimensions, system and scope are agreed, the sketch remains discussion material rather than an order confirmation.