A spell of warm weather is always welcomed in the UK, especially after months of grey skies and rain. But while many of us enjoy the sunshine, rising temperatures can have a surprising impact on our homes.
Most UK properties were built to keep heat in during winter, not release it during summer. As temperatures climb, homes can quickly become uncomfortable indoors, and prolonged heat can begin to affect the structure and materials of a property in ways that are often overlooked.
The impact of heat on your roof
Roofs are exposed to the full force of the sun for hours each day yet heat related roof damage often goes unnoticed until bad weather arrives.
Prolonged exposure to high temperatures can dry out roofing materials and weaken mortar and pointing. At the same time, guttering, flashing and other external fittings may expand in the heat and develop small cracks or gaps.
These issues may seem minor during dry weather, but once heavy rain returns, they can quickly lead to leaks and water damage inside the property.
Shifting ground beneath your home
From top to bottom, one of the biggest issues caused by extended hot weather starts below ground level. During long dry periods, soil begins to lose moisture and shrink. This is particularly common in clay heavy soil, which naturally expands when wet and contracts when dry.
As the ground moves, it can place stress on a property’s foundations, especially in older homes or buildings with shallower footings. In mild cases this may lead to small cracks appearing around walls or windows, but more significant movement can contribute to subsidence problems if left unchecked.
Maintaining a consistent level of moisture in the soil around the property can help reduce the risk of sudden movement during periods of extreme heat.
Why doors and windows start sticking
When temperatures rise, your doors and windows can start to lose their composure. If your doors or windows suddenly become difficult to open during warmer weather, heat and humidity are usually to blame.
Timber is a natural material that absorbs moisture from the air. During humid summer conditions, wood expands as moisture levels rise, which can cause doors, frames and floorboards to swell slightly. This is why homes often creak more during hot weather and why doors that fitted perfectly a few weeks ago may suddenly start sticking.
Although this movement is usually temporary, ongoing expansion and contraction over time can contribute to wear and distortion in timber features.
Cracks caused by heat and temperature changes
Hot weather does not just affect the ground beneath your home. Building materials themselves also react to changing temperatures.
As materials such as plaster, brickwork and render heat up and cool down, they naturally expand and contract. Over time, repeated movement can cause cracks to appear or existing cracks to widen.
Small hairline cracks are often nothing serious, particularly in older properties, but cracks that become larger or continue to spread should always be monitored carefully and assessed professionally where necessary.
Why doors and windows start sticking
If your doors or windows suddenly become difficult to open during warmer weather, heat and humidity are usually to blame.
Timber is a natural material that absorbs moisture from the air. During humid summer conditions, wood expands as moisture levels rise, which can cause doors, frames and floorboards to swell slightly. This is why homes often creak more during hot weather and why doors that fitted perfectly a few weeks ago may suddenly start sticking.
Although this movement is usually temporary, ongoing expansion and contraction over time can contribute to wear and distortion in timber features.
Preventing problems before they escalate
While summer weather may feel less threatening than winter storms, prolonged heat can still place considerable strain on a property. Keeping an eye on cracks, sticking doors, roof condition and signs of movement can help identify problems before they become more serious and expensive to repair.
If you are buying a property and want reassurance about its condition, a professional home survey can help highlight any existing or potential defects before you commit to a purchase.
Get in touch to book a home survey.