Benefits of Sunlight for Seniors: 1920s Rooftop Therapy

If you were to look at photographs of hospitals from the 1920s, you might be startled by what you see. Rows of patients, including children and the elderly, bundled in blankets and resting in beds on open-air balconies and rooftops, even in the middle of winter. It looks strange to our modern eyes, accustomed to sterile, indoor clinical environments. But this wasn’t a primitive practice; it was a sophisticated medical treatment known as heliotherapy.

This approach, often called sun therapy, was a cornerstone of healthcare before the widespread availability of antibiotics. Doctors understood something fundamental that we are only now beginning to rediscover: the immense healing power of sunlight. They believed that fresh air and controlled exposure to the sun were powerful tools for recovery and well-being.

So, what happened to this practice? And more importantly, why were those 1920s hospitals right? This article explores the lost science of rooftop sun therapy and explains why its principles are more crucial than ever for the health and happiness of Australian seniors today.

The Rise and Fall of Heliotherapy: Why 1920s Hospitals Looked Different

In the early 20th century, the architecture of healing was fundamentally different. Hospitals were designed to embrace the natural world, not shut it out. This philosophy was built on the principles of heliotherapy, the therapeutic and prescribed use of sunlight to treat illness.

• A Different Architecture: Hospitals and sanatoriums built in the 1920s featured wide, sweeping balconies, rooftop wards, and large glass-walled rooms called ‘solariums’. These weren’t just aesthetic choices; they were medical facilities designed to maximise patients’ access to sunlight and fresh air.
• The Antibiotic Era Shift: With the discovery of penicillin in 1928 and its widespread use from the 1940s, medicine underwent a profound transformation. The focus shifted to fighting disease with pharmaceuticals inside highly controlled, sterile environments. The ‘enemy’ was germs, and the solution was to create sealed indoor spaces.
• The Unintended Consequence: As medicine moved indoors, hospital and aged care design followed. Balconies were enclosed, windows became smaller, and deep-plan buildings reliant on artificial light and ventilation became the norm. In prioritising clinical efficiency, we inadvertently stripped away two of nature’s most powerful healing agents: natural light and fresh air.

The Sanatorium Legacy

The most famous application of heliotherapy was in sanatoriums, specialised hospitals for treating tuberculosis (TB). Before antibiotics, doctors like Auguste Rollier in Switzerland and Sir Henry Gauvain in England pioneered ‘open-air’ therapy. They found that a careful regimen of sun exposure, fresh air, and good nutrition could dramatically improve outcomes for patients with respiratory and bone conditions. The prevailing belief was simple and powerful: ‘nature is the best physician’. This holistic approach was the standard of care before the pharmaceutical boom of the mid-20th century.

Why We Moved Indoors

The shift away from nature-centric design was driven by technological and philosophical changes. The advent of air conditioning and reliable artificial lighting meant that architects no longer needed to design buildings around natural ventilation and light. This led to more ‘efficient’ but less humane spaces. The focus on clinical sterility created an environment that was easy to clean but often isolating and disconnected from the natural world, a trend that has defined many institutional settings, including aged care homes, for decades.

The Biological Case for Sun Therapy: Why Our Seniors Need the Light

The 1920s doctors were right, and modern science now proves it. The benefits of sunlight go far beyond a simple feeling of warmth; natural light triggers critical biological processes that are especially important for the health of older adults.

• Vitamin D Synthesis: Our skin produces Vitamin D when exposed to ultraviolet (UV) light from the sun. This vitamin is essential for absorbing calcium, which is vital for strong bones. For seniors, adequate Vitamin D is a first-line defence against osteoporosis, falls, and debilitating fractures.
• Circadian Rhythm Regulation: The human body runs on an internal 24-hour clock, or circadian rhythm, which is set by exposure to light. Bright morning light is particularly effective at synchronising this clock, promoting wakefulness during the day and deep, restorative sleep at night. This is crucial for dementia patients, as a well-regulated circadian rhythm can significantly reduce ‘sundowning’—a state of confusion and agitation in the late afternoon and evening.
• The ‘Happy Hormone’ Connection: Sunlight boosts the brain’s production of serotonin, a neurotransmitter that helps regulate mood. Higher serotonin levels are associated with feelings of calm and well-being, making sun exposure a powerful, natural tool for combating the depression and isolation that can affect many seniors in care.

This process, where light influences cellular function, is part of a field called photobiomodulation, which studies how light energy can stimulate repair and reduce inflammation within the body’s cells.

Bone Health and Fall Prevention

Hip fractures are a devastating event for seniors, often leading to a loss of independence and a decline in overall health. In Australia, there is a strong link between low Vitamin D levels and the rate of falls and fractures in the elderly. Despite our reputation as a ‘sunburnt country’, studies have shown that a surprisingly high percentage of Australian seniors, particularly those in residential aged care, are Vitamin D deficient. This is often due to spending the vast majority of their time indoors, away from the sun’s essential rays.

Mental Well-being and Cognitive Function

The impact of natural light on mental health is profound. Research conducted in aged care settings has shown that increasing residents’ access to natural light can improve mood, reduce agitation, and even lower the need for psychotropic medications. Even for those with limited mobility, simply having a view of the outdoors from a window can reduce cognitive fatigue and stress. Providing this connection to nature is a simple yet effective way to support residents experiencing the challenges of dementia and sleep disturbances.

Bringing the ‘Sun Deck’ Home: Practical Ways to Organise Open-Air Therapy

Reintroducing the principles of heliotherapy into a senior’s life requires a balanced and sensible approach, especially in Australia.

• The Australian Paradox: We live with a unique challenge—balancing the critical need for sun-driven Vitamin D with the very real risk of skin cancer from UV radiation. The goal is not to bake in the sun for hours, but to achieve short, regular, and safe exposure.
• Creating a ‘Safe Sun’ Routine: The best time for sun exposure depends on the season and location in Australia. Generally, in summer, it’s best to aim for a few minutes in the early morning or late afternoon when the UV index is lower. In winter, midday sun is often ideal. The Cancer Council’s advice is a good guide: when the UV index is 3 or above, sun protection is needed.
• Modifying the Home Environment: For those receiving care through the new Support at Home Program, simple modifications can make a big difference. This can include positioning a favourite chair near a north-facing window, using mirrors to reflect light into darker rooms, or creating a small, safe outdoor zone on a balcony or in a courtyard.
• Advocating for Outdoor Time: Within the My Aged Care framework, quality of life is a key consideration. Families can and should advocate for care plans that include regular, supervised outdoor time, whether it’s a short walk in a garden or simply sitting on a sunny verandah.

Sun Safety for the Australian Senior

Safe sun exposure is about being smart, not avoiding the sun altogether. The key is to find the right balance.

• Understanding UV Ratings: Check the daily UV index via the Bureau of Meteorology or a weather app. When it’s below 3, you can get some sun without protection. When it’s 3 or higher, it’s time to be cautious.
• Practical Tips: For planned outdoor time, a wide-brimmed hat, sunglasses, and protective clothing are essential. Always have water on hand to stay hydrated. The ’10-minute rule’ is a good starting point—just 10-15 minutes of sun on the arms and face a few times a week can be enough for Vitamin D synthesis in many people.

Adapting Your Living Space

Creating an inviting outdoor space is crucial. Ensure any balcony or garden area is easily accessible, with clear, non-slip paths and sturdy, comfortable seating. Pay attention to ‘thermal comfort’—a common barrier to going outside is the fear of being too cold. Providing warm blankets, a lap rug, or a sheltered spot that blocks the wind can make all the difference and encourage a senior to enjoy the fresh air.

Selecting Aged Care Homes with a Focus on Natural Wellness

When the time comes to choose a residential care facility, it’s vital to look beyond the clinical statistics and assess the physical environment.

• Look Beyond the Brochure: A home’s commitment to natural wellness is a powerful indicator of its overall philosophy of care. Does the environment feel vibrant and connected to the outdoors, or does it feel sealed and institutional?
• Key Questions to Ask: During a tour, don’t hesitate to ask specific questions. You can find a comprehensive list in our guide on essential questions to ask when touring an aged care facility. Specifically for this topic, ask: ‘How often do residents get the opportunity to go outside?’ and ‘Are there safe, accessible gardens or sunny courtyards available at all times?’
• Identify Innovative Models: Look for homes that prioritise ‘biophilic design’—an architectural approach that integrates nature into the built environment. This is a hallmark of innovative models of aged care that recognise the deep human need for connection to the natural world.
• Use Our Directory: When searching for care, you can use the Aged Care Made Easy directory to find and compare facilities. Pay close attention to photos and descriptions that highlight features like sensory gardens, walking paths, and sunny balconies.

What to Look for During a Tour

When you visit a potential aged care home, become an observer of light and space. Check for large windows and natural light in residents’ private rooms and communal areas like dining and lounge rooms. Evaluate the outdoor spaces: are the paths wide enough for mobility aids? Is there a mix of sunny and shaded seating? Are the gardens well-maintained and inviting?

The Future of Care Architecture

The good news is that the best modern aged care providers are re-embracing the wisdom of the 1920s. They are reintroducing the ‘sun deck’ concept in modern forms, such as secure rooftop cafes, therapeutic sensory gardens, and internal courtyards that bring light and nature into the heart of the building. This shift reflects a broader move towards ‘person-centred care’, a model that respects not just the clinical needs of a resident, but their holistic human needs—including the fundamental need for sunlight and fresh air.

The science is clear. The lessons from our own history are undeniable. By prioritising access to the natural world, we can create aged care environments that don’t just sustain life, but truly enrich it.

Frequently Asked Questions (FAQs)

Is rooftop sun therapy safe for seniors with sensitive skin?

Yes, when done correctly. The goal is short, gentle exposure, not prolonged sunbathing. It should happen outside of peak UV hours (before 10 am and after 3 pm in summer). For those with very sensitive skin, sitting in a brightly lit room near an open window or on a shaded verandah can provide many of the mood and circadian benefits without direct UV exposure.

How much sunlight does a senior actually need for Vitamin D benefits?

This varies based on skin type, location, and season. However, a general guideline for many older Australians is about 10-15 minutes of sun on their face, arms, and hands, 3-4 times a week during non-peak UV times. In winter, longer periods may be needed. It’s always best to consult with a GP for personalised advice.

Can artificial ‘daylight lamps’ replace the benefits of the sun in aged care?

Daylight lamps, or light therapy boxes, can be very effective at helping to regulate circadian rhythms and improve mood, especially in winter or for residents who cannot go outside. They are a valuable tool. However, they cannot trigger Vitamin D production in the skin, so they cannot completely replace the unique biological benefits of natural sunlight.

What should I do if a care facility doesn’t allow residents to go outside often?

Start by speaking with the care manager. Frame your request around the resident’s quality of life and the known health benefits. Ask what the facility’s policy is on outdoor access and what support can be put in place to make it happen safely. If you are not satisfied with the response, you have the right to raise a concern with the Aged Care Quality and Safety Commission.

Are there specific government standards for outdoor access in Australian aged care?

The Aged Care Quality Standards are not overly prescriptive about the exact number of hours, but they are clear that providers must support residents’ well-being and quality of life. Standard 1 (Consumer Dignity and Choice) and Standard 5 (Organisation’s Service Environment) are particularly relevant. A provider must offer a safe, comfortable, and well-maintained environment that supports residents to ‘live the life they choose’. Denying reasonable access to the outdoors could be seen as failing to meet these standards.