Four questions you can always answer — where the building is, which way the glass faces, what the room is for, and what matters most. We resolve them into a specification and show the reasoning, so you can argue with it.
Specification
Answer the four questions and we will resolve them into an openness range, a category and a weave direction — with the reasoning shown.
Fig. 01Limits
It is a starting specification, not daylight modelling — and it does not name one fabric and call it the answer.
Two fabrics at the same openness perform differently — the weave, the yarn and the colour all move the result. The deciding numbers live on the mill spec sheets, measured against specific glazing. A tool that skips to a product name is hiding that from you.
A state is enough to know whether a building is fighting heat or keeping it. It is not enough for anything finer, and a dropdown that implied otherwise would be pretending to a precision it does not have. Large states get told they straddle a boundary.
Bring us the glazing and the elevation and we will take it further — ask our team, or read the fenestration reference.