For a large swimming pool complex, high winds and cool temperatures outside make thermal efficiency targets that little bit harder to attain. Add in the need to maximize the amount of natural light poolside, and achieving required heat gains presents a challenge. Translucent Danpalon® façade systems are providing building designers with an elegant solution.
Pachuca in Central Mexico is a very windy city and by Mexican standards is also quite cold, with an average temperature of 16ºC throughout the year. When Alberca Universidad Politécnica Metropolitana came to rebuild its swimming pool complex the building’s thermal efficiency was a key design criteria.
At the same time, the project needed to reuse as much existing infrastructure as was possible. With the swimming pool then largely determining the building’s orientation, façade design played a vital role in maximizing natural light and heat gain on the inside while handling the high winds on the outside.
The architects, Instituto Hidalguense de la Infraestructura Fisica Educativa (INHIFE) also had to face the challenge of building in sandy soil conditions that offered a relatively low weight resistance. With the weight and movement of the swimming pool being a significant part of the structure’s overall loading, the use of lightweight façade materials was vital. Turning to translucent Danpalon® polycarbonate façade systems, the INHIFE architects found an aesthetically pleasing and technically robust solution capable of meeting the project’s competing demands for light diffusion, thermal insulation, physical strength and low material weight.
A full-height Danpalon® façade constructed using 16mm Ice panels runs the complete length of one side of the swimming pool on a steel frame, while a further Danpalon® façade using a combination of 22mm 3DLite metallic grey and red panels sits at one end of the pool.
INHIFE architect Edgar Baca said, “The fantastic level of light diffusion that these two complementary façades achieve creates a truly unique ambience, with high quality daylight for the interior and a wonderful luminosity for the exterior at night.”
He continued, “Danpalon® has added a huge amount of character to the building thanks to the interaction of material, light and surroundings. At no point does it ever look the same. The hue, texture and appearance depends on where it’s viewed from and the weather conditions. It has given the project real life and personality.”
The new swimming pool complex is a unique wedge-like form composed of gentle slopes, elegant curves and striking lines. A heightened façade wall to increase the natural light diffusion and enable optimization of roof span and pitch was aided by the use of extra long Danpalon® panels, which also avoided the need for horizontal jointing. Panel installation was rapid, taking just a few days from delivery to completion.
Baca added, “Considering the enhanced thermal efficiency the new swimming pool building has attained, and the tremendous functionality it is now providing, this is a project that to date has not once caused us to think that any kind of design adjustment was merited – it really is working to perfection.”
While windows increase the amount of light in a room, they can also create glare and solar gain. Without careful planning, a large glass window can flood a space with painfully bright light and can act as a lens that will increase the amount of heat in a room. Because of these two factors, people who work in spaces that have large, glass windows frequently add window shades and curtains that can obviate the benefits of having a large expanse of transparent material capable of admitting natural light.
One might ask, if natural light through windows has so many problems, why should we bother with it at all. The answer is that, even with all of the attendant difficulties, natural light has been shown to convey many benefits. Humans are primarily diurnal. That is, we are set up to function best in the daylight hours. Daylight not only make it easier for humans to see, it has a positive effect on the pineal gland – and organ modern science is only just beginning to understand. School children who are exposed to natural light for at least fifteen minutes per day – and more is better – tend to be more able to focus during class time, producing better school work and correspondingly good grades. Hospitals have found that patients who have undergone surgery have a better recovery rate when their rooms are open to an outside view and when they are exposed to natural, rather than artificial, lighting. Natural light or light therapy has even been shown to have a positive effect on Alzheimer’s disease patients, particularly the ones who have difficulty sleeping at night. When the light was administered in the morning, it was found that it reduced aggression sometimes displayed by some Alzheimer’s patients in the afternoon. For the rest of us, sunlight is simply uplifting. 