Can heatwaves damage garden furniture in the UK?

Heatwaves in the UK are becoming an increasingly common summer challenge, with soaring temperatures putting not only us but also our garden furniture to the test. In 2025, we've experienced 3 (or is it now 4?) official heatwaves, with temperatures soaring above 30°C across much of the country for prolonged spells.

These heatwaves, driven by high-pressure systems, have made this summer one of the hottest on record. Such extreme heat poses challenges not just for us but also for our garden furniture, which can suffer from warping, fading, and material degradation if not properly cared for.

For those who cherish their outdoor spaces, understanding how hot weather affects different types of outdoor furniture is just as important as caring for your lawn or plants. It’s key to keeping your garden inviting, comfortable, and looking its best throughout the summer season.

At Lazy Susan, we appreciate that your garden is more than just a patch of grass, though — it’s a sanctuary, a social hub, and an extension of your home. That’s why we champion a durable material like cast aluminium, which stands up far better to the UK’s increasingly extreme and changeable conditions than many other options.

With the right choices and a little care, your garden can continue to be the place you love, no matter how high the mercury rises. In this guide, we’ll explore exactly how heatwaves can damage garden furniture — from the subtle fading of colours to the more serious risks of warping and cracking.

We’ll also share expert advice on protecting your seating area and dining table, helping you create a cool, comfortable retreat in your garden. Plus, we’ll sprinkle in some practical tips to ensure your outdoor space stays fresh, stylish, and ready for all those sunny moments (and even the occasional wet one too).

Whether you’re investing in new pieces or caring for your existing collection, these insights will empower you to enjoy your garden through every season — making the most of those glorious sunny periods while keeping your furniture looking its absolute best.

How Does Hot Weather Affect Your Outdoor Furniture?

Heatwaves in the UK bring high temperatures and intense sun exposure, turning your garden into a natural oven. This creates a powerful direct heat source that can impact all types of garden furniture — from wooden furniture to metal furniture, plastic items, and even delicate rattan garden furniture.

But not all garden furniture reacts the same way to these conditions, and understanding their vulnerabilities can make a big difference in how you maintain and protect your outdoor investments:

Wood: Natural Beauty Meets Heat Vulnerability

Wood is a wonderful, natural choice for outdoor furniture, offering warmth and character. However, wood is also a living material that reacts to changes in temperature and moisture. During extended periods of extreme heat, especially under direct sunlight, wooden furniture — particularly softer woods — can develop small cracks, warp, or become brittle.

This happens because heat causes the wood fibres to lose moisture, leading to shrinkage and tension within the material. Solid hardwood furniture, like teak or oak, is much more resilient due to its density and natural oils, but it’s not immune. Without regular re-oiling or sealing, wood can quickly dry out. Its high heat retention means it cools slowly, too, which over time weakens the structure and diminishes its aesthetic appeal.

Plastic and Synthetic Materials: Heat Retention and UV Impact

Plastic furniture and synthetic rattan are popular for their affordability and low upkeep, but they come with their own set of challenges in hot weather. These materials also retain heat longer than metal — so they cool down more slowly when moved into the shade — and although they don’t get as hot to the touch, they can become sticky, making surfaces uncomfortable on sunny days.

Moreover, exposure to harsh UV rays can degrade the molecular structure of plastics and synthetic fibres — a process known as photodegradation. This causes colours to fade, materials to become brittle, and, in some cases, softening or warping. While high-quality plastic furniture often includes UV stabilisers to reduce damage, lower-quality pieces may show signs of wear much faster, especially during soaring temperatures.

Metal Furniture: Strength with Heat Considerations

Metal garden furniture, especially cast aluminium, is prized for its strength, durability, and sleek design. Because aluminium has a relatively low thermal mass, it doesn’t retain heat as much as metals like steel or iron, or materials such as wood and plastic, making it less prone to warping or cracking even during extreme heat.

Metal’s ability to absorb and conduct heat quickly means it can warm up under strong sunlight. While this is part of its durability and strength, it can make the surface hot without shade or UV-resistant cushions. Our powder-coated finish greatly reduces heat buildup, and by placing furniture in shaded areas or pairing it with parasols and umbrellas, you can ensure maximum comfort and extend its longevity.

Understanding how heat and UV rays uniquely affect each material helps you make informed choices about care and placement. This knowledge not only prolongs the life of your outdoor furniture but also ensures your garden remains a comfortable and stylish retreat during the hottest summer spells.

Why Cast Aluminium Is a Smart Investment for ALL Weather

When it comes to furnishing your garden for the long haul, especially with soaring temperatures becoming more frequent in the UK, cast aluminium stands out as a smart investment. Its unique combination of durability, style, and weather resistance makes it a favourite among homeowners who want furniture that can handle the heat — and look great doing it.

Unlike wooden garden furniture, which can warp, crack or fade without regular care, cast aluminium is built to last with minimal maintenance. Like any material, it will warm up in direct sun — but the advantage of aluminium is that it releases heat quickly. Pop up a parasol or move it into shade, and it cools fast, especially with our durable powder-coated finish. Add UV-resistant cushions and you’ve got comfortable, resilient seating that’s ready for all 4 seasons in one day.

The secret to aluminium’s weather-beating powers lies in our construction and finishing. Our collection features a tough powder coating — a protective barrier that guards against UV rays, moisture, and everyday wear and tear. This coating helps prevent rust, chipping, and fading, keeping your furniture looking fresh and vibrant year after year.

To keep your cast aluminium furniture in peak condition, we would also recommend that you apply a light coat of wax or a specialised protective sealant annually. This simple maintenance step creates an additional layer of defence, preserving colour and shine while making the furniture easier to clean.

Another reason cast aluminium shines in the garden is its versatility in design. It can be crafted into elegant, timeless pieces with clean lines that complement both classic and contemporary outdoor aesthetics. This adaptability ensures your furniture remains a stylish focal point as garden trends evolve, making it a smart investment not just for now, but for years to come.

Aluminium’s unique balance of lightness and strength makes it easy to move and rearrange, whether you’re following the shade or reworking your space. With our cast aluminium range, you’re choosing furniture that blends lasting resilience with timeless style — built to handle UK heatwaves while helping you create a comfortable, beautiful outdoor retreat.

Outdoor Furniture Materials: What to Choose for Your Outdoor Space?

When furnishing your garden, it’s important to consider materials that can withstand hot weather while maintaining their aesthetic appeal and comfort.

Each material behaves differently under high temperatures and sun exposure, so understanding the different strengths and vulnerabilities will help you create a durable and inviting outdoor space:

	Pros	Cons	Care & Maintenance	Best Use Tips
Wood (Teak, Oak, etc.)	Natural beauty, warmth, timeless appeal; durable with care	Requires regular upkeep; can crack, warp, or fade in strong sun; retains heat	Clean with a soft brush + mild soap; apply oils/sealants regularly	Place in shade during the hottest hours to extend life
Metal (Cast Aluminium)	Strong, resilient, rust-resistant, low-maintenance, lightweight and stylish	Can heat up quickly in direct sun	Wipe down regularly; apply protective wax occasionally	Use UV-resistant cushions; combine with covers for year-round use
Rattan (Natural)	Casual, natural look; charming aesthetic	Fragile; vulnerable to sun and moisture; can dry, crack, or fade	Careful cleaning; regular conditioning	Best kept in shaded or covered areas
Rattan (Synthetic)	Weather-resistant; UV and moisture resistant; low-maintenance; long-lasting appearance	Less “authentic” than natural rattan	Occasional cleaning only	Great for busy gardens; withstands UK sun and rain
Glass	Elegant, modern, enhances dining areas	Gets very hot in sunlight; prone to chips/cracks; shows dirt easily	Regular cleaning; protect with placemats/tablecloths	Use parasols/umbrellas to reduce heat buildup
Plastic	Affordable, lightweight, easy to move, minimal upkeep	Lower quality plastics may warp, fade, or become brittle, and retains heat	Clean with soapy water; avoid abrasives	Choose UV-resistant, fade-proof plastics for durability

Choosing the right materials and understanding how to care for them will help you enjoy a beautiful, functional garden that stands strong against the challenges of UK heatwaves. For lasting comfort and style, combine your material choices with smart shading solutions, protective cushions, and regular maintenance.

How to Keep Your Garden Furniture Safe During UK Heatwaves

1. Create Shade to Keep Your Garden Comfortable

One of the simplest yet most effective ways to protect your outdoor furniture from intense sun and heat is to create shade. Use umbrellas, pergolas, or awnings to shield your seating area and dining table from direct sunlight during sunny periods. Shaded areas not only prevent damage but also make your garden a more pleasant place to relax.

2. Use UV-Resistant Cushions and Fade-Proof Textiles

If your furniture includes outdoor cushions, opt for UV-resistant cushions with fade-proof textiles. These are specially designed to withstand harsh UV rays and sun exposure, maintaining colour and texture longer even under soaring temperatures.

3. Apply Protective Coatings on Metal Furniture

Even durable materials like cast aluminium benefit from some extra care. A protective car wax is our go-to. It’s simple to apply, helps shield against the UK climate, encourages water to bead off the surface, and makes cleaning easier while enhancing the powder-coated finish.

4. Store Cushions and Delicate Plants Indoors When Not in Use

When extreme heat is forecast, consider moving outdoor cushions, potted plants, and other sensitive items indoors. This protects them from sun damage and keeps your outdoor space looking fresh.

Dining Table Care: Why It Matters

Your dining table is often the heart of your outdoor space — a gathering spot where family and friends come together to enjoy meals, drinks, and long sunny afternoons. Because of its central role, proper care of your table is essential, especially during hot weather when sun exposure and high temperatures can cause damage or discomfort.

1. Metal and Glass-Topped Garden Tables

Tables with metal furniture frames or glass-topped garden items have a sleek, modern look but tend to heat up quickly under direct sunlight. This can make the surface uncomfortably hot to touch and increase the risk of heat-related damage.

• Protect your table by creating shade using umbrellas, pergolas, or retractable awnings.

• Use tablecloths or placemats made from fade-proof textiles to shield surfaces from intense sun and prevent scratching.

• Regularly clean the glass surface with gentle glass cleaner to maintain sparkle, and avoid abrasive pads that could cause scratches.

2. Wooden Garden Furniture

Wooden garden furniture brings natural warmth and charm, but requires special attention in hot weather to maintain its beauty and durability.

• Regular cleaning with a soft brush and mild soapy water removes dirt without harming the wood.

• To combat drying and prevent your wood from developing small cracks, apply protective oils or sealants specially formulated for solid wood furniture.

• These treatments help the wood retain moisture and resist warping caused by retaining heat during sunny periods.

• Avoid placing wooden tables in full sun for extended periods where possible; creating shade will go a long way to preserving the wood’s integrity.

3. Plastic and Synthetic Rattan Tables

Plastic items and tables made from synthetic rattan are popular for their low maintenance and weather resistance, but they can still suffer from UV damage.

• Over time, exposure to harsh UV rays may cause plastic to become brittle or discoloured.

• Clean with soapy water and a soft cloth to remove dirt and prevent dust buildup.

• Applying a UV protectant spray designed for plastics can extend the lifespan of your table.

• Covering plastic tables during sunny periods or when not in use also helps reduce wear.

4. Natural Rattan and Wicker Tables

Tables crafted from natural rattan or wicker have a delicate aesthetic but are more vulnerable to the effects of direct sunlight and extreme heat.

• Avoid prolonged exposure to sunny weather to prevent drying and brittleness.

• Dust and clean gently with a soft brush, avoiding soaking the material.

• When not in use, store natural rattan tables in shaded areas or indoors to protect against cracking and fading.

• If you love the rattan look but want something more resilient, consider synthetic rattan, which offers greater resistance to heat and moisture.

By tailoring your care routine to the specific materials of your dining table, you can protect it from the impacts of hot weather, preserving both its function and aesthetic appeal. This attention to detail ensures your outdoor dining experiences remain comfortable and stylish, no matter how high the temperatures climb.

Big Difference: Regular Maintenance Extends Furniture Life

When it comes to protecting our garden furniture during hot weather, consistent maintenance might seem like a small effort, but it truly makes a big difference in how your outdoor pieces withstand the challenges of sun exposure and soaring temperatures.

For cast aluminium garden furniture — renowned for its durability and heat resistance — proper care during the summer months will keep it looking pristine and help extend its lifespan.

Step 1: Clean Regularly to Remove Dirt and Debris

Dirt, pollen, bird droppings, and debris can accumulate on your furniture during the warmer months. Left unchecked, this buildup can trap moisture, which may lead to corrosion around joints and fittings or cause the powder coating to degrade prematurely.

• Use a soft brush or cloth with warm, soapy water (a mild detergent is best).

• Gently clean all surfaces, paying particular attention to crevices and areas where dust and grime collect.

• Rinse with clean water and dry thoroughly with a soft towel to avoid water spots.

Avoid abrasive cleaners or harsh chemicals, which can damage the colour-maintaining formula on your furniture’s finish.

Step 2: Inspect for Damage and Repair Promptly

After cleaning, take a close look at your furniture’s surface:

• Check for any small cracks, chips in the paint, or areas where the powder coating might be compromised.

• Look at joints and screws to ensure they are tight and not showing signs of rust or corrosion.

• Early repair of minor damage prevents moisture ingress and further deterioration during extreme heat or wet weather.

Step 3: Apply a Protective Coating

To shield your cast aluminium furniture from the harsh effects of UV rays and intense sun, applying a protective coating is an excellent idea:

• Use a light coat of high-quality car wax or a specialised metal furniture wax, which adds a barrier against direct heat sources and helps maintain the furniture’s shine.

• Apply the wax with a soft cloth, buffing it gently into the surface for an even finish.

• This step should be done at least once or twice during the summer, especially after cleaning.

Step 4: Use Protective Covers When Not in Use

Even the toughest finishes benefit from some extra protection when your furniture isn’t in use:

• Invest in protective covers that are breathable to prevent moisture build-up.

• Covers help block harmful UV rays, reduce dust accumulation, and shield your furniture from sudden summer showers.

• Removing covers regularly to let your furniture “breathe” helps avoid trapped moisture that could lead to mildew.

Step 5: Store Cushions and Fabrics Indoors

If your set includes outdoor cushions or fabrics, remove these during hot weather to avoid fading or material breakdown:

• Store cushions in a dry, shaded area or use storage boxes designed for outdoor textiles.

• Consider investing in UV-resistant cushions with fade-proof textiles for better longevity.

By following these simple but effective steps, you’ll not only preserve the look and feel of your cast aluminium garden furniture but also ensure it remains comfortable and safe to use during those sunny periods and heatwaves. Regular care turns a smart purchase into a lifelong garden companion.

Insights from an Outdoor Furniture Expert

With many years of experience in the garden furniture industry, Lazy Susan has become a trusted outdoor expert for UK homeowners looking to create beautiful, long-lasting outdoor spaces. Our deep understanding of how hot weather and high temperatures affect different materials means we’re perfectly placed to offer practical advice.

“At Lazy Susan, we believe that investing in durable materials is more than just practical — it’s a smart investment in the long-term comfort and beauty of your garden. Our cast aluminium garden furniture is not only lightweight and effortlessly stylish, but it also stands up brilliantly to soaring temperatures and heatwaves, especially when compared to lower quality alternatives. It’s designed for year-round outdoor use, meaning you can enjoy your outdoor space come rain or shine, with minimal upkeep and maximum impact.”

At Lazy Magazine, even though our furniture is durable and low-maintenance, we would still stress the importance of a little proactive care:

“Simple steps like regular cleaning, applying a protective wax, and most importantly, creating shade where possible, can make a big difference to how your furniture performs under the sun. Using protective covers when your furniture isn’t in use helps maintain its finish and prevents fading from prolonged sun exposure.”

However, our expertise goes beyond furniture — we also recommend thoughtful garden design choices that help protect and enhance your entire outdoor space.

“Adding pergolas, parasols, or planting potted plants strategically not only keeps your garden cooler but also enhances the atmosphere of your outdoor seating areas. By combining quality products with practical maintenance and smart garden planning, homeowners enjoy their gardens year-round, even during the hottest summer spells."

Our Final Thoughts: Enjoy Your Garden All Summer Long

With UK heatwaves becoming more frequent, keeping your garden furniture safe from the effects of soaring temperatures is essential. By choosing durable materials like cast aluminium, applying regular maintenance, and implementing smart shading strategies, you can protect your outdoor investment and create a comfortable, beautiful outdoor space.

Remember, not all garden furniture is suited for extreme heat, so select higher-quality furniture and take care of it well. A little effort goes a long way toward preserving your garden's beauty and functionality throughout those lovely sunny periods.

If you’re ready to upgrade your outdoor furniture for the UK’s hotter summers, check out our stunning cast aluminium collections — designed with both style and resilience in mind. Your garden deserves nothing less than the best!

And when your patio is summer-ready with our garden furniture, we’d love to see it in action...

Share your beautifully styled outdoor space with us on Instagram or Facebook @LazySusanFurniture. Don’t forget to support our Do Some Good campaign by uploading your garden and table styling photos — your creativity could help inspire others to create their outdoor sanctuary this season.