Fall is giving way to winter in Des Moines. You can see it in the days growing dark and the nip in the air that seems to be getting colder by the hour.
And if you have a deck, particularly a wooden one, it’s going to need attention. Winter can be hard on decks, because moisture can seep into cracks, freeze, then thaw—over and over again. But the good news is that a few simple steps can help you protect your investment and prevent expensive repairs down the road.
As an experienced Des Moines deck company serving the area, we've seen how proper winter preparation extends deck life significantly and we want to share those tips with you. Let's break down what you need to do based on your deck material.
Wood Deck Maintenance
1. Inspect and Repair Before Freezing Temps
Walk your deck carefully and look out for loose boards, popped nails, and cracked or rotting wood before cold weather sets in. These are eyesores, yes, but we’re not telling you do this for style reasons. You want to find places where moisture can seep into cracks, freeze and expand. Addressing these issues now will let you reduce the damage winter can do to your deck, and it’s important to do this while temperatures still allow for repairs.
2. Clean Thoroughly
Sweep away leaves, pine needles, and debris that prevent proper drainage and promote mold and mildew growth. It’s also a good idea to use a deck-safe cleaner to remove dirt and mildew that can make boards dangerously slippery during winter months.
3. Seal or Reseal
After thoroughly cleaning your wood deck, you can then apply a high-quality water-repellent stain or sealant. The best time to do this is in the early fall before temperatures drop consistently below 50. This protective layer will help your deck withstand future freeze-thaw cycles and prevent warping or cracking. Des Moines deck contractors recommend resealing every 2-3 years for optimal protection.
4. Cover Gaps Around Planters and Furniture
Moisture trapped beneath pots, rugs, or furniture can cause discoloration and accelerate decay over time. Use risers under planters or move items occasionally to allow airflow. This simple step prevents those telltale dark spots that indicate rot beginning beneath the surface.
5. Clear Snow Gently
When winter arrives, use a plastic shovel (never metal) to avoid scratching and damaging wood surfaces. Shovel in the direction of the boards to minimize potential damage. Don't use salt or ice melt unless it's specifically labeled safe for wood. You may be surprised at just how many products can accelerate deterioration.
Composite Deck Maintenance
1. Sweep Regularly
Keep leaves, acorns, and dirt off your composite deck to prevent stains and mold growth during cooler, damper weather. Composite will resist these issues better than wood, but like any material, dirt and time can take its toll.
2. Wash Before Winter
Clean with warm, soapy water or a composite-safe deck cleaner before winter weather arrives. Use a soft brush to remove grime from textured surfaces where dirt accumulates. This simple cleaning prevents buildup that becomes harder to remove after freeze-thaw cycles.
3. Check Gaps and Drainage
Composite boards need good airflow underneath for optimal performance. Clear debris between boards so melting snow can drain freely rather than sitting in gaps where it can refreeze. Proper drainage prevents ice buildup that can damage even the most durable of composite materials.
4. Avoid Using Metal Tools
When removing snow, use only plastic shovels and work with the grain of the boards to prevent surface scratches. While composite is more scratch-resistant than wood, metal tools can still damage the protective cap layer that gives composite its durability and fade resistance.
5. Skip Harsh Chemicals
Never use chlorine bleach or rock salt on composite decking. Both can damage the surface and void manufacturer warranties. If you need an ice melt product, choose something specifically labeled as safe for composite decking.
Looking For “Deck Builders Near Me?”
Take a few hours this fall to properly prepare your deck for winter. Your investment will thank you with years of additional service. Browse our decks gallery for inspiration if you're thinking ahead to replacement, and download our design guide to explore options.
If this winter feels like your deck's last hurrah, or if you're ready to explore replacement options, we'd love to help you plan for next season.
It would be our distinct pleasure to meet with you for a no-obligation complimentary design consultation. Call Harold Cross and his team at 515-203-8734, or contact us using our online form.
