For inside-mount sheer shades, record the recess dimensions and usable hardware space before entering the selected product's order measurements. A neat recessed appearance depends on the actual assembly and opening; a universal deduction does not guarantee the fit.
Choose a candidate from sheer shades, obtain its measuring instructions and identify the required lift. A vane-style shading's headrail, roll/cassette and fabric travel need their own clearance plan.
Step 1: label the opening and mounting plane
Name the window by room and position. Sketch the inside opening, trim and proposed bracket/headrail location. Measure the recess where the assembly is intended to sit, rather than the visible glass or outer decorative casing.
Use a suitable tape and a written record with clear units. Follow the supplier's requested precision; do not impose inches or one-sixteenth-inch rounding on a system using another convention. Use safe access or suitable measuring help for high openings.
If an existing treatment obscures the recess, arrange safe permitted access according to its instructions. Do not automatically dismantle every old covering or remove a sill just to begin the record.
Step 2: record the clear widths
Measure straight across at the top, middle and bottom of the proposed recess and keep all three values. Note any narrowing, uneven edges or projecting hardware.
Use the selected maker's instructions to determine the order input. Many systems distinguish opening size from finished assembly size; the hardware width and fabric width can also differ. Do not assume the supplier always makes the same quarter- or half-inch deduction.
Keep the raw measurements separate from any value derived for the order. That makes it easier to resolve a question without reinterpreting an unexplained number.
Step 3: record the vertical distances
Measure at left, center and right from the intended upper reference to the relevant lower boundary. Record any sloping sill or difference between sides.
Follow the product's instructions for the height entered and the intended bottom position. Do not automatically use the longest height to resolve every sloped sill or assume a universal height deduction applies.
A rectangular custom shading will not necessarily match every irregular edge. Ask about suitability where the opening varies enough to affect travel, coverage or appearance.
Step 4: check usable depth and movement
Measure the available depth at the actual headrail/bracket position, accounting for stops, locks, tilt latches, handles and other projections. Check across the required locations.
Compare the exact minimum installation depth and any separate fully recessed requirement. They are different questions. A partly projecting assembly may be permitted for one system and unsuitable for another.
Open and close the sash and operate the handle while assessing the proposed fabric plane. The moving path matters, not only the depth with the window closed. Do not alter hardware or order an unlisted slim bracket to force the fit.
Make the record reviewable
| Window information | What to include |
|---|---|
| Identifier | Room and position. |
| Candidate product | Model, fabric, opacity and lift. |
| Raw widths | Top, middle and bottom with units. |
| Raw heights | Left, center and right with units. |
| Usable depth | At the proposed hardware position, with obstacles marked. |
| Moving parts | Handle, lock and sash travel. |
| Order convention | Opening or finished size; who makes deductions. |
| Desired appearance | Fully recessed or an approved projecting arrangement. |
Add clear photographs or a side-view sketch. Measure each opening separately even where the windows look the same.
Check light and privacy alongside the dimensions
An inside mount still has operating clearances and possible edge light. A custom order is not a zero-gap promise. Select the actual fabric and intended operating position for daytime light and evening sightlines.
Read the light-gap guide to identify coverage concerns. Do not add improvised side tracks or seals to a sheer assembly without product approval.
If the recess cannot support the intended configuration, compare a permitted outside mount or another product. The mounting comparison and trim/casing guide help frame those alternatives. Neither replaces the chosen model's dimensions.
Frequently asked questions
Should I measure glass or the opening?
Record the actual recess for the intended inside assembly. Use the product's guide to identify the correct reference surfaces.
Should I subtract clearance myself?
Confirm the exact order convention and who makes deductions. Never deduct twice or assume another maker's allowance.
What if existing brackets are in the way?
Identify the old system and arrange safe permitted removal or assessment where needed. Old brackets are not automatically compatible support for a new sheer shading.
When should I obtain help?
For difficult access, uncertain measuring references, irregular openings or unresolved handle/depth conflicts—before committing to the custom order.
