A fixed pergola and a bioclimatic one solve different problems. The second offers adjustable shading, and usually brings more mechanisms, sensors and maintenance requirements with it.
The two solve different problems. A fixed angled louvre gives shade; it does not keep the water out. A bioclimatic one has rotating louvres that allow shade and ventilation to be adjusted within the same structure and that close against rain — and with them come a motor, a power supply, controls and, where provided, a rain or wind sensor, each of which needs maintenance and one day perhaps a spare part. Three things decide: the wind, since the structure and its fixings are calculated for the place; whether watertightness is needed or only shade; and access for servicing.
Before we decide
- exposure to sun and wind,
- whether the structure needs to be watertight or only to provide shade,
- management of rainwater,
- the existing supports,
- automation and future servicing.