Hot houses: how extreme temperatures can damage your property

Picture of a radiant sun over a house

Cracked roofs, garden fires, and overheating. It’s getting hot in here, so make sure your home and garden knows how to handle it.

By Tom Pilkington

Summer heatwaves are becoming the norm in the UK. While some sun worshippers may see this as a positive impact of climate change, there will be far-reaching consequences, not least the impact it will have on our homes.

Hot houses

In the future the UK will experience hotter and drier summers and the reality is our homes aren't prepared for them. Most houses in the UK have been designed to keep heat indoors so we can be nice and cosy in the winter – they’re not designed for extreme heat - but the UK is experiencing rising temperatures.Footnote [1]

Buildings built from concrete, for example, absorb more of the sun’s heat, making it more likely to overheat. This is uncomfortable, not only for the residents, but for the building itself. Excess heat can cause cracks and worn surfaces to deteriorate, while paint will fade faster too. There’s no place to hide and there’s no factor 50 for your roof, which can be weakened from warping and cracking caused by exposure to sunlight.

Subsidence can also be a concern when the weather gets hotter and drier. Find out the tell-tale signs to look for, like cracks in walls.

Cool off, prevent damage

Home insurance policies don’t cover natural wear and tear, so it’s important that you look after your home:

  • Make sure your property is well maintained – longer and more frequent periods of extreme heat will take its toll on building materials, meaning it’ll need more maintenance. If a storm arrived and your roof was already cracked, you may not be able to claim if poor weather made an existing problem worse.
  • Create shade – make the most of morning air circulation, but close curtains to keep the house as cool as possible. This is a technique used by people in hotter countries around the world – you’ll feel all cultured and continental, we promise.
  • Open windows to make the most of any circulating air but be mindful of thieves, and remember to close any open windows if you leave your home.
  • Ventilation – high humidity mixed with a lack of air moving around can lead to mould growth, so be sure to ventilate your home.

Garden fires

The sound of sizzling sausages is lovely and summery, but as the weather becomes warmer and more Brits are dusting off their barbeques and loading up on firelighters, there’s greater risk of garden fires.

Most standard home insurance policies include limited cover for your garden and its items in the event of a fire, as long as reasonable care and precaution is taken to prevent it spreading. If you’re lucky enough to have a garden filled with wonderful but expensive items like a hot tub, then it’s best you check your policy’s single-item limit, as you may need to insure these separately.

Here are some ways to be safer with fire:

  • Don’t leave fires unattended
    You might be tempted to jump in the paddling pool, but it only takes a few seconds for a fire to get out of control, so make sure there’s always someone watching over it.
  • Be careful with firelighters
    Starting a fire with your bare hands would make your caveperson ancestors proud, but let’s be honest, most of us use firelighters or an equivalent to help us out. However, these are powerful substances and can quickly get out of hand if not managed carefully.
  • Dispose of barbecues, cinders and matches responsibly
    This is an important one. Garden fires are often caused by cinders that are dumped in the bin or a bonfire while still hot. Make sure that coals aren’t glowing before you dispose of them and be careful where you discard matches or cigarettes. 
  • Keep a bucket of water or sand on stand-by
    It’s better to be safe than sorry. If the flames start to lick your geraniums instead of your burger patties, then this will help put them out.

Explore the Aviva Edit

Insightful reads from our money, insurance, and health blog.

Read all about it

Floods, storms and extreme weather

How to help protect your home, belongings and stay safe when the weather gets wild.

We’ve got you covered

Read more like this