When temperatures climb into the upper 90s and triple digits, most homeowners start worrying about themselves but your deck is also feeling the heat. It’s important to think about ways to protect your deck. Prolonged exposure to extreme temperatures and intense UV rays can affect every decking material differently, whether you have exotic hardwood, composite, PVC, or HDPE decking.

The good news? Most modern decking materials are built to withstand hot weather. However, a few simple maintenance steps can help your deck look better, last longer, and stay safer to use during a summer heat wave.

Here’s how to protect your investment no matter what type of decking you own.

1. Keep Your Deck Clean

Heat alone isn’t usually what damages a deck, it’s the combination of heat, moisture, dirt, pollen, and organic debris.

Leaves, dirt, and spilled food can trap moisture against the surface, creating conditions for staining, mildew, or discoloration after afternoon thunderstorms.

During a heat wave:

Sweep your deck regularly.
Remove leaves from between deck boards.
Wash away pollen and dust with a garden hose or manufacturer approved cleaner.
Clean spills immediately, especially grease, sunscreen, and beverages.

A clean deck also reflects sunlight more evenly and is less likely to develop stubborn stains that become “baked in” under intense UV exposure.

Protecting Exotic Hardwood Decking

Hardwoods like Ipe, Cumaru, Tigerwood, Garapa, Teak, Brazilian Redwood, and Mahogany are among the most heat resistant decking materials available. Unlike many synthetic products, they don’t soften in high temperatures and maintain excellent structural stability.

However, sunlight not heat is what causes hardwood decking to weather.

2. Decide Whether You Want to Maintain the Color

Many homeowners love the rich brown tones of hardwood decking.

Others prefer the elegant silver gray patina that develops naturally over time. The lighter silver color tends to be cooler to touch than the rich dark brown color.

Hardwood decking like the Ipe wood deck in the picture above that the homeowner let go gray remains smooth and the wood does not deteriorate like pressure treated pine.

When Ipe, Cumaru, Tigerwood as well as the other hardwoods we stock turn gray, they remain splinter free and safe for bare feet for many years to come. In addition even though the wood has turned gray you can still see the beautiful wood grain as well.

If you want to preserve the original color:

Apply a high quality UV protective hardwood oil before the hottest part of summer.
Reapply as needed depending on sun exposure.
Clean the deck thoroughly before oiling.

Products like DeckWise® Ipe Oil® help replenish natural oils while slowing UV fading.

If you don’t mind the silver gray appearance, simply keep the deck clean. The weathering process is cosmetic and does not reduce the wood’s structural performance.

3. Don’t Let Water Sit on the Surface

Although hardwoods are incredibly durable, standing water should never remain on any deck.

After summer storms:

Remove planters or furniture trapping moisture.
Ensure debris isn’t blocking drainage.
Verify adequate airflow beneath the deck.

Good ventilation is especially important for hardwood decking. At AdvantageLumber.com, we generally recommend at least 18 inches of ventilation beneath standard hardwood deck boards whenever possible to maximize long term performance.

4. Avoid Dragging Heavy Furniture

Extreme heat can soften the rubber feet on outdoor furniture, increasing friction when moved and leaving marks on your deck.

Instead of dragging:

Lift heavy furniture.
Use furniture pads.
Inspect chair legs for rough edges.

This helps preserve the beautiful finish on hardwood decking. Hardwood decking is less prone to scratches but can still be scuffed from other items getting heated in the sun.

Protecting Composite Decking

Today’s capped composite decking such as Trex®, TimberTech®, and Deckorators® composite decking is engineered to perform well in harsh weather.

Still, heat waves require a little extra attention.

5. Prevent Heat Buildup

Composite decking can become noticeably warmer than natural wood when exposed to direct sunlight.

To reduce surface temperatures:

Use umbrellas or pergolas.
Add outdoor rugs approved for composite decking (check manufacturers specifications as some area rugs can void your warranty).
Position furniture to create shade.
Install trees or landscaping for long term cooling.
Install sun shades over head to reduce the heat and direct UV rays.

Even partial shade can significantly improve comfort.

6. Remove Standing Water After Storms

Although capped composites resist moisture very well, standing water combined with dirt can leave mineral deposits or surface stains.

After rain:

Sweep away puddles if necessary.
Keep gaps between boards free of debris.
Wash away pollen and dust periodically.

7. Clean Grease Quickly

During summer cookouts, grease can become more difficult to remove after baking in the sun.

If food spills:

Wipe immediately.
Use the manufacturer’s recommended cleaner.
Avoid harsh solvents unless specifically approved.

Prompt cleaning keeps composite decking looking new for years.

Protecting PVC Decking

PVC decking contains no wood fibers, making it one of the most moisture resistant decking options available.

Products like TimberTech AZEK® offer exceptional resistance to:

Moisture
Mold
Mildew
Rot
Insect damage

Heat waves generally won’t harm PVC decking structurally, but they can make the surface hotter to walk on.

8. Reduce Surface Temperatures

Consider:

Shade sails
Pergolas
Large umbrellas
Outdoor area rugs rated for PVC decking (check manufacturers specifications as some area rugs can void your warranty)

Lighter colored PVC boards typically remain cooler than darker colors in direct sunlight.

9. Avoid Extremely Hot Objects

Never place:

Hot grills directly on the decking
Fire pits without approved heat barriers
Metal containers that have been sitting in direct sunlight

Use grill mats and heat resistant pads whenever possible.

Protecting HDPE Decking

HDPE decking products, such as TanDeck® and Lumberock®, are extremely durable and highly resistant to moisture.

Since HDPE contains no wood fibers:

It won’t rot.
It won’t absorb water.
It won’t require staining or sealing.

However, like other synthetic decking products, darker colors can become warm during prolonged sun exposure.

10. Wash Off Dust and Pollen

Heat can bake airborne pollen and dirt onto HDPE surfaces.

Periodic washing helps maintain appearance and prevents buildup.

11. Inspect Fasteners

During long periods of high temperatures, all decking materials naturally expand and contract.

At the beginning and end of summer:

Check hidden fasteners.
Tighten loose hardware.
Inspect railings.
Verify that screws remain secure.

This quick inspection can prevent small issues from becoming larger repairs later.

What NOT to Do During a Heat Wave

Regardless of decking material, avoid these common mistakes:

❌ Pressure washing at excessively high PSI
❌ Using chlorine bleach on hardwood decking
❌ Dragging heavy furniture
❌ Leaving metal objects sitting in direct sunlight on the deck
❌ Allowing leaves and debris to accumulate
❌ Ignoring standing water after storms

The Best Way to Keep Any Deck Looking Great

The biggest enemy of any outdoor deck isn’t necessarily extreme heat it’s neglect.

Whether you own a beautiful Ipe hardwood deck, a low maintenance composite deck, premium PVC decking, or virtually maintenance free HDPE decking, routine cleaning and seasonal inspections go a long way toward extending its life.

For hardwood decks, applying a quality UV protective oil can help preserve the rich natural color. Composite, PVC, and HDPE decks require even less maintenance, but keeping them clean, checking fasteners, and adding shade where practical will help maximize both comfort and appearance during the hottest days of summer.

Stay Cool and Protect Your Investment

Heat waves are becoming more common across much of the country, but with a little preventative maintenance, your deck can continue looking and performing its best for decades.

At AdvantageLumber.com, we offer one of the industry’s largest selections of decking materials, including premium exotic hardwoods like Ipe, Cumaru, Tigerwood, Garapa, and Teak, along with top performing composite, PVC, and HDPE decking brands such as Trex®, TimberTech®, Deckorators®, TanDeck®, and Lumberock®.

Not sure which decking material is best for your climate? Contact the decking experts at AdvantageLumber.com. We’ll help you choose the right material for your project and show you how to keep it looking beautiful through every season, even during the hottest summer heat waves.

How to Protect Your Deck During a Heat Wave