How to cool down an over-heating garage

During the summer, garages can quickly overheat due to limited airflow.

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We will discuss ways to cool down your garage and make it as comfortable as possible to enjoy throughout the hotter temperatures.

Open the overhead door

By fully or slightly opening the garage overhead door you can maximise airflow into the garage. Adding a fan will also create a gentle breeze.

Install garage shelving such as those at to ensure no belongings obstruct the airflow.

Insulate the ceiling

Insulating the garage ceiling is an effective way to cool the room, and even works well in the rest of the house and according to recent statistics around 3.9 million garages have been converted into living spaces in the last 20 years.

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Wall insulation

Wall insulation helps stave off the summer heat in the garage whilst also guarding from the winter cold. While wall insulation is not required to be covered, panelling such as wallboard should be installed to enclose the material. This will prevent children or pets tearing anything out.

Rollaway awnings

By attaching adjustable rollaway awnings on any sun-facing sides of your garage, you can create shade during the summer whilst allowing sunlight to enter during the winter.

Planting a deciduous tree in a sunny spot is an inexpensive way of also keeping your garage cool in high temperatures. Aim to plant a tree near the garage which will give shade during the hottest time of the day. During the summer this will provide shade over the garage and during the colder months, the leafless branches will let sunlight through to heat the garage. Hardwood trees such as ash or oak are ideal.

Insulate the overhead door

Insulating your garage’s overhead door is a great way of keeping the garage warm in winter whilst cooling the space during summer. If your door is made of uninsulated metal, add a two-inch layer of stiff insulation to the inside of the panels using contact cement.

If you have the budget, an insulated, sectional door installed overhead is the most heat efficient alternative.

Stationary vents

Stationary vents can be installed at the roof to create an exit point for the hot air that is trapped inside the garage.

This ventilation is inexpensive, although not as effective as mechanical exhaust systems.