Garages can become uncomfortably warm during summer, particularly when the roof and door receive direct sunlight for much of the day. Limited ventilation, poor insulation and heat from electrical equipment can make the temperature rise further.
Whether you use your garage for storage, exercise, hobbies or practical work, the following steps can help you manage the heat more effectively.
Ventilate at the Right Time
Opening the garage door when the outside temperature is at its highest can allow more hot air into the building. Where possible, ventilate the garage in the early morning or evening when the air outside is cooler.
Open windows and doors to create airflow, but do not leave the garage unsecured or unattended. Once the outside temperature starts to rise, closing windows and using blinds or other shading can help slow down further heat entering the garage.
Never leave a vehicle engine running inside the garage, even when the main door is open.
Block Direct Sunlight
Windows can allow a significant amount of sunlight into the garage. Blinds, curtains or suitable internal shading can reduce solar gain while still allowing you to uncover the window when natural light is needed.
A lighter-coloured garage door may absorb less heat than a very dark surface in direct sunlight. However, the door material, insulation, orientation and amount of shade will also influence the temperature inside.
If your current door is damaged or unsuitable for how you use the space, Dencroft offers a range of manual and remote-operated garage doors.
Consider Garage Insulation
Insulation is not only useful during winter. It can also slow the transfer of heat through the roof, walls and door during warm weather, helping the garage maintain a more stable internal temperature.
The roof is particularly important because it may receive direct sunlight throughout the day. The most suitable insulation will depend on the garage construction, roof design and intended use.
Our garage insulation guide explains the main areas and materials to consider. Ventilation should still be maintained, as insulation alone will not remove heat or prevent condensation.
Use Fans Effectively
A fan circulates air and can help people feel cooler, but it does not reduce the actual temperature of the garage. It will be most useful when positioned to draw in cooler air or move warm air towards an open window or door.
Keep cables away from walkways and make sure the fan is stable. Do not use damaged equipment or connect several extension leads together.
If the garage becomes excessively hot, particularly during exercise or physical work, stop what you are doing and move to a cooler place.
Decide Whether Air Conditioning Is Worthwhile
Air conditioning may be worth considering if the garage is used regularly as a workshop, office or hobby space. However, it is unlikely to operate efficiently in a draughty or poorly insulated garage.
Portable air-conditioning units need a suitable route for exhausting warm air outside. Doors and windows should remain closed while the unit is running, apart from the properly sealed exhaust opening.
A fixed air-conditioning system should be selected and installed by a competent professional. Any new fixed electrical supply must also comply with the relevant electrical safety requirements.
Reduce Heat From Equipment
Lighting, chargers, computers, televisions and workshop equipment all produce heat. Turn off anything that is not being used and avoid leaving batteries or electrical equipment charging unnecessarily.
Choose LED lighting where suitable, as it generally produces less unwanted heat than older lighting technologies. Check the storage instructions for paint, chemicals, batteries and other temperature-sensitive products, as a hot garage may not be an appropriate location for them.
Check the Roof, Door and Ventilation
Blocked vents, damaged roof sheets and poorly positioned storage can restrict airflow. Inspect the garage periodically and make sure existing ventilation openings have not been covered.
Guttering should also be kept clear and roof damage repaired promptly. Any work on roof sheets should be approached carefully, particularly on older garages where materials may contain asbestos.
Plan Ahead When Choosing a Garage
If you are planning a new garage, consider where the sun falls throughout the day and how windows, doors and ventilation will affect the internal temperature. Dencroft offers a range of garage windows, roofing materials and optional extras that can be selected according to how the building will be used.
For advice on garage designs and available options, contact Dencroft Garages to discuss your requirements.
