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What slope and height should a pergola have? Bioclimatic and other systems

What slope and height should a pergola have? Bioclimatic and other systems

07.11.2026 5 min read SkyArt Group

A bioclimatic pergola works without a slope; at most about 5 cm of fall is given to guide water. Fabric and glass roofs need a slope (e.g. 15%). Post height can be made to order; above 3.5 m the posts are reinforced.

Short answer

The right slope depends on the system. A bioclimatic pergola works without a slope: water runs through channels in the louvres into the gutters, and at most about 5 cm of fall is given to guide it. Fabric, glass or panel roofs are installed with a slope so that water runs off.

Slope by system

SystemSlope
Bioclimatic pergolaFlat; max. ~5 cm fall for drainage
Rolling roof5%
Fabric pergola roof15%
Conservatory glass roofAt least 15%
Retractable glass roofAt least 15%

How tall should a pergola be?

  • Bioclimatic pergola posts can be made to the height you want; it is set at the survey according to the terrace, door and window levels and the view.
  • If posts exceed 3.5 metres, they are reinforced.
  • For wall-mounted installs, height follows a suitable fixing point on the wall.

Size and load

A single bioclimatic unit covers up to 36 m² (for example 10 m deep, 7.80 m rear width); larger areas combine several units. The system carries about 50–60 kg/m² of snow load. See bioclimatic pergola profiles and bioclimatic pergola dimensions.

As an authorised Albert Genau manufacturing dealer, SkyArt Group manufactures and installs bioclimatic pergolas in Istanbul. Let's set the height and mounting for your terrace at a free survey.

Frequently asked questions

Is a bioclimatic pergola installed on a slope?

No, it works flat. At most about 5 cm of fall is given to guide water.

What slope do fabric or glass roofs need?

Fabric pergola roofs 15%, conservatory glass roofs at least 15%, rolling roofs 5%.

How tall can a pergola be?

Bioclimatic pergola posts are made to order; above 3.5 m they are reinforced.

How much snow load does a bioclimatic pergola carry?

About 50–60 kg per square metre.

Let us measure your space.

The site survey and project design are free. We measure on site and present a tailored solution the same week.