Round transition pieces per opening.
Why can total doorway width understate purchased transition stock?
Use the matching calculator
Use this decision sequence
- List each finished opening width separately.
- Read the selected profile’s usable stock length.
- Round each opening to source pieces rather than pooling arbitrary scraps.
- Flag openings that require more than one piece and confirm whether joining is permitted.
Keep the quantities distinct
| Quantity or assumption | How to use it |
|---|---|
| Individual opening | Keeps its full-length purchase requirement. |
| Combined width | May assume an impossible offcut allocation. |
| Profile joints | Need supplier approval independently of quantity. |
Worked comparison
For openings of 0.9 m, 1.2 m and 2.5 m, 2 m stock requires 1 + 1 + 2 = 4 pieces under the separate-opening model. Rounding the combined 4.6 m alone would give only 3.
Check before using the estimate
This count allows joints geometrically but does not establish that a selected profile permits them.
All dimensions, product properties, prices and specifications in this example are illustrative arithmetic inputs. Use the values from your measured plan, selected product data sheet and supplier quote. This guide does not choose construction specifications or certify safety.
Calculation and scope checked 2026-10-04. Methods and scope.
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