ᐅ South Terrace: Glass Roof with an Overhead or Underneath Retractable Awning?

Roofing that prevents any buildup of trapped heat in the first place. An underroof is only necessary for those who are very concerned about dirt.

Even without side walls, heat build-up can occur. This can happen if the area is sheltered from the wind or simply on days when there is no breeze. Fluid dynamics is complicated.

So, we also considered it and decided to go with an under-roof.

The entire south side, the roof is about 3.5 × 3 m (11.5 × 10 ft), with an awning next to it.

We have enough ventilation underneath so that there is no heat buildup, and currently, we are not outside at midday anyway, not even in the shade.

Just looking at all the debris that usually accumulates on the roof, I prefer to have all the mechanics with the rail underneath so they don’t get dirty as quickly.

bububu11 schrieb:

We are currently planning a glass patio roof with a windbreak on the west side (also glass). The roof measures 4.5 m x 4 m (15 ft x 13 ft).

I really love these “isolated” questions about construction projects where we don’t see the complete plans – it’s easy to miss crucial details in your mental picture.

In general, it should be noted that heat buildup occurs immediately behind the glass passage. A short distance between the glass and an underawning doesn’t help – on the contrary, the most effective solution would be a gap about two hand widths wide, provided this intermediate space is well ventilated. Also, it’s important to keep in mind that rain and wind, often carrying pollen or resin, will reliably soil an overhanging awning, which will then likely be rolled up in this dirty state by the wind sensor as soon as possible. So if it’s outside, never choose plain white tones.

Under glass, and instead of fabric, louvered blinds could be a relatively good solution – although probably not the most cost-effective.

Does the patio roof overlap the eaves of the main roof? If so, heat buildup could be reduced by airflow around the roof edge (with the minor downside of a slight downdraft on those sitting against the house wall).

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I am still in favor of glass that darkens at the push of a button. It’s common in cars. Possibly not cost-optimized either.

hampshire schrieb:

I am still in favor of glass that darkens at the push of a button. It’s known from cars. Possibly also not cost-optimized.

Do you have any experience with its durability?