How to Keep Your Summerhouse Cool During Summer

As the temperatures rise, there’s nothing quite like retreating to a summerhouse. But when it comes to keeping it cool in this shifting season, that’s where the tricky part comes in. The last thing you want is your beloved retreat to feel like a sauna.

It’s time to ensure it remains the perfect escape from the scorching sun. Lucky for you, with a few simple tricks, you can keep your garden summer house refreshingly cool. In this guide, we’ll walk you through a few ‘smart choices’ to help you beat the heat!

Assessing and Optimising Your Summerhouse Design

BillyOh Renna Tongue and Groove Corner Summerhouse
BillyOh Renna Tongue and Groove Corner Summerhouse

By considering these steps, you can effectively regulate the temperature inside your summerhouse. Here’s how you can assess and optimise your summerhouse design:

Evaluating the layout

Analyse the orientation of your summer house in relation to the sun’s path. Start by understanding how the sun’s movement affects your summerhouse during the day. Take note of the areas that receive the most sunlight and heat. This will help you identify the spaces that require extra attention when it comes to cooling.

Then, determine areas that receive the most sunlight and heat. Walk around your summerhouse at different times of the day. Observe which parts are exposed to direct sunlight for extended periods. These areas can become hotspots and may require targeted cooling solutions.

Insulation and ventilation

Insulation plays a vital role in keeping summer houses cool. Ensure that walls, ceilings, and floors are properly insulated to prevent heat transfer from outside. Consider using foam boards or insulation films to create a barrier.

Ventilation is also key to circulating fresh air and dissipating heat. Assess the existing windows and see if they’re positioned to allow for effective airflow. Consider installing additional windows to improve cross-ventilation or vents for air circulation.

Enhancing Shade and Blocking Sunlight

BillyOh Lily Tongue and Groove Apex Summerhouse
BillyOh Lily Tongue and Groove Apex Summerhouse

Here are some effective ways to enhance shade and block sunlight in your summerhouse:

Exterior solutions

Install retractable awnings, canopies, or pergolas to create shaded spaces. Besides blocking direct sunlight, they add a stylish element to your summerhouse. Choose materials and designs that complement the overall aesthetics of your retreat.

Consider planting trees or tall shrubs strategically around for natural shade. Deciduous trees are particularly useful during summer when their foliage is full. They also allow sunlight during winter when they shed their leaves. Choose trees or shrubs that are suitable for your climate and won’t cause damage to the structure.

Interior solutions

Install blinds, curtains, or shades on windows and doors to regulate the sunlight in the unit. Opt for light-coloured or reflective materials to minimise heat absorption. Or choose adjustable blinds or curtains to have control over the amount of light and privacy.

Window films and solar screens are designed to reduce heat gain and block harmful UV rays. These films are applied to the glass surfaces and come in various shades and designs. Consider using films or screens that have high solar reflectance and low emissivity.

Utilising Cooling Techniques and Appliances

Here’s how you can make the most of these strategies:

Natural cooling methods

BillyOh Dorset Log Cabin
BillyOh Dorset Log Cabin

Cross-ventilation helps circulate fresh air and cool down your summerhouse. Identify the prevailing wind direction and open windows on opposite sides for a breeze. Consider installing window screens to keep insects out while allowing airflow.

Reflective surfaces can help bounce sunlight away from your summerhouse, reducing heat gain. Use light-coloured or reflective materials for exterior surfaces, such as roofs or walls. This trick helps minimise the absorption of solar radiation. Also, apply reflective coatings or paints to enhance the sun-reflecting properties.

Cooling appliances

Fans are a cost-effective way to keep the air circulating and create a cooling effect. Install ceiling fans in strategic locations to promote airflow throughout the summerhouse. Portable fans can be used to direct air where it is needed the most, such as seating areas.

Depending on your needs and budget, install air conditioning systems designed for summerhouses. Ductless mini-split systems provide efficient cooling without the need for ductwork. Portable ACs offer flexibility and can be moved to different areas as required.

Smart Landscaping for Temperature Control

BillyOh Petra Tongue and Groove Reverse Apex Summerhouse
BillyOh Petra Tongue and Groove Reverse Apex Summerhouse

Here’s how you can utilise smart landscaping techniques for controlling temperature in summerhouses:

Choosing heat-tolerant plants

Opt for plants that can thrive in hot and dry conditions. Examples include succulents, cacti, lavender, rosemary, and ornamental grasses. These plants are not only resilient to heat but also add beauty and texture to the landscape.

Watering is crucial for maintaining the health and vitality of your plants. Deep watering encourages plant roots to grow deeper and be more resilient to heat stress. Additionally, consider incorporating drip irrigation systems to cut water loss through evaporation.

Creating green walls or trellises

Vertical gardening with climbing plants offers multiple benefits. As these plants grow upwards, they create shade and provide natural cooling. Consider plants like vines, jasmine, or bougainvillaea.

Green walls or trellises can be constructed using materials like wood, metal, or wire mesh. These structures provide support for climbing plants and create shaded areas. Ensure the trellises are placed to block direct sunlight from entering your summerhouse.

Optimal Furniture Selection

Malmö Bench with Aluminium Frame
Malmö Bench with Aluminium Frame

Opt for furniture made from lightweight materials such as aluminium, wicker, or rattan. These materials are not only durable but also allow for better air circulation, helping to keep you cool.

Proper furniture placement plays a significant role in keeping your seating areas cool. Arrange your furniture in shaded areas. Or position them under umbrellas or awnings to minimise exposure to direct sunlight.


Creating a cool and comfortable summerhouse is within your reach with the right strategies in place. With these tips, you can beat the summer heat and enjoy your retreat to the fullest. Remember to prioritise comfort and consider the unique needs of your space.

Shop Summerhouses