A venue's outdoor area shows on the plan as square metres, but in reality it exists only for as many days as it is usable. A terrace that empties in rain, cannot be sat on in wind and is avoided under the midday sun works far below its capacity on paper. In this article we look at the technical ways of increasing outdoor capacity and at the items to examine when assessing the investment.
The first step is correctly diagnosing why the existing terrace goes unused. In most venues there is more than one problem: the afternoon western sun empties the tables, the late-afternoon wind troubles the service plates, a sudden downpour drives customers inside. The solutions to those three problems are different systems; trying to answer all of them at once with a single product leads to the wrong investment.
Sun control is the first item solved on an open-roofed terrace. A fixed canopy cuts the sun but also removes the appeal of open sky in fine weather. Bioclimatic systems resolve that dilemma: with the louvres open the area works like an open terrace, and closed it provides shade and rain protection. The same area serves two different functions through the day.
Rain is the most expensive variable outdoors because it arrives suddenly and empties tables mid-service. A system whose louvres lock against gaskets and direct water into concealed gutter channels keeps the tables in place when a downpour starts. The detail that matters here is where the water goes: if the gutter channel is not drained through the columns, water pours beside the tables and the problem is not solved.
Wind directly reduces capacity, especially on upper floors and at venues near the shore. Zip screen systems installed on the side façades cannot be blown about because their edges lock into the tracks, and they calm the area. Screen fabric slows the wind while preserving the view; crystal PVC stops it entirely. In most venues the right setup is dividing the façade by how it is used.
Extending the season is the investment's most tangible return. An unenclosed terrace turns into dead space over the winter months; an enclosed one stays in use even if it does not reach the same occupancy as indoors. Expectations have to be set correctly here: the aim is not indoor temperature but an area free of wind and rain where, supported by a heater, people can sit. We covered the winter setup in detail in this article.
The heating plan should be considered together with the enclosure. Infrared heaters warm people and surfaces rather than the air, so they are more efficient on high-ceilinged terraces and their positioning should follow the table layout. Gas tower heaters produce combustion products in an enclosed volume and must not be used without ventilation; in commercial use that is a safety item requiring particular attention.
Service flow is as important as the technical solutions but is often skipped. On an enclosed terrace the point where staff will pass in and out must be clearly defined; opening and closing a screen each time slows service and loses heat. The right setup is leaving a fixed passage opening in one section, or fitting that section with a separately controlled module.
Lighting determines the terrace's evening use. LED strips integrated into the louvres give diffuse, soft light without requiring separate fittings. Light temperature also affects the customer experience: cold white light makes the area look like an office, while warm tones lengthen the time people stay. Cabling concealed within the columns looks cleaner and lasts better than cable run afterwards.
Acoustics emerge as an unexpected problem on enclosed terraces. When an area with hard surfaces is enclosed, sound reflects and the noise level rises; customers struggle to talk at the table. Outdoor-grade rugs, plant walls, timber decking or soft-surfaced furniture reduce that reflection. Factoring this effect in when deciding to enclose is easier than intervening afterwards.
The permit process is the item that must be clarified before the project in commercial applications. Enclosing an outdoor area and installing a fixed structure are subject to different rules depending on the municipality; pavement occupancy, façade appearance and building permission may be assessed separately. If you are a tenant, the owner's written consent is also required. An investment that skips these steps can face removal after installation; we recommend clarifying the process with the relevant municipality from the outset.
In assessing the investment there is a single question: does the system turn unusable days into usable ones? The calculation is specific to the venue and it would be wrong to give a general ratio. The data you need is already yours: the number of days the terrace closed because of rain, how long the terrace stood empty over the winter months, the tables avoided at midday because of the sun. Those three items show how many days the investment wins back.
Phased investment is the practical way to proceed without straining the budget. Most venues solve the biggest loss-maker first: a zip screen on the western façade or a bioclimatic pergola over the main seating area. When the system is set up as modular, adding fabric to a side façade or installing a heater line the following season is possible without altering the existing structure. That requires anticipating future additions in the first project.
Brand appearance is a gain independent of capacity. A system running along the façade on the same line and at the same height gives the venue an identity; different products added piece by piece leave a scattered impression. A single colour chosen from the RAL card builds coherence between aluminium surfaces and fabric tones. On a commercial façade this visual consistency is as valuable as the system's technical performance.
In summary, increasing outdoor capacity is not buying a single product but identifying the conditions that empty the terrace and planning a solution for each. When sun and rain control above, wind blocking at the sides, heating in winter, evening lighting and preserved service flow are designed together, the terrace becomes an area that works for most of the year. We also covered hotel and restaurant applications in this article.
To identify on site the conditions under which your terrace loses capacity, request a free site survey.
Frequently Asked Questions
In commercial applications it generally is, and the rules vary by municipality; pavement occupancy, façade appearance and building permission may be assessed separately. If you are a tenant, the owner's written consent is also required.
No. The aim is not indoor temperature but an area free of wind and rain where, supported by a heater, people can sit comfortably. If indoor comfort is expected, insulated glass systems are needed.
Yes. The biggest loss-maker is solved first, with side-façade fabric or a heater line added the following season. That requires anticipating future additions in the first project.
