Nowadays, we are all looking for ways to boost our energy efficiency. For some of us, this is because we want to lower our energy costs and save some money; for others, it is more an environmental issue – we want to reduce greenhouse gas emissions and lower our carbon footprint. Well, did you know that the colour of your roof can have a significant impact on the temperature of your home, and, as such, the amount of energy you need to use to keep it warm/cool? It’s true: in fact, it is something that governments around the world are taking into account in an attempt to regulate the temperatures and energy output of certain areas.
So, with that in mind, here are three different colours that can impact the energy efficiency of your roof and, ultimately, have a positive result on the environmental footprint of your home.
It is a well-known fact that dark colours absorb more heat than light colours. If you have ever tried to walk barefoot across a black tarmac car park on a hot day, then you will have had firsthand experience of how much heat it can take in! Black or dark-coloured shingles, tiles, asphalt or bitumen can get particularly hot in the sun, meaning properties with black roofs in warm climates often have to rely on energy-intensive air-conditioning systems to keep their buildings cool. In large cities, the prevalence of black roofs, roads and car parks creates an ‘urban heat island’ effect that causes them to be 5–10 per cent hotter than other areas.
In a lot of hot climates, cool roofs are used on properties to keep temperatures down. These usually have white coatings or tints that reflect sunlight and protect the building from UV rays. These reduce the need for air conditioning by lowering the temperature of the roof – as such, improving your environmental footprint and lessening your energy costs.
Across the world, there is a growing trend for ‘green’ or ‘living’ roofs – where vegetation covers part or all of a building’s roof. As well as keeping the roof’s temperature down by absorbing sunlight, green roofs also purify the air around the property by converting CO2 into oxygen, and promote biodiversity by offering a habitat for wildlife.
So, there you have it: three different roofing colours that can have a big impact on your environmental footprint.