It’s true. Your deck won’t last forever. But you can keep it in great shape for decades to come…
If you’re willing to invest in a little bit of TLC, that is.
So to help you best protect your investment—while enjoying plenty more summer sunsets and cool mornings sipping coffee outside—we’re bringing you the Ultimate Guide to DIY Deck Maintenance and Upkeep in 2025.
Give it a quick scan. You’ll learn how to keep your deck safe, looking great, and in excellent structural condition year after year.
So let’s go.
What’s the Difference in Maintenance Required for Wood vs Composite Decks?
Let’s start with the hardcore basics: wood decks require more upkeep—plain and simple.
Every year or two, you’ll need to clean, sand, stain, and seal the wood to protect against moisture and UV damage. Additionally, wood is more susceptible to rot, insect damage, and splintering.
On the other hand, composite decks are much lower maintenance, as they are made from a mix of wood fibers and plastic. While they still need an occasional cleaning to prevent slippery mildew (especially in shady areas), there’s no sanding, sealing, or staining required—ever.
If you don’t already have a deck—and are considering a custom deck design in the future—you might want to factor this into your decision.
Why Should I Clean My Deck?
Cleaning your deck is an easy and important part of proper deck upkeep.
Regular cleanings with a mild detergent remove dirt, pollen, mold, and algae—all of which can stain or even damage your deck’s surface (particularly on wooden decks). What’s more, mold and mildew can make your deck slippery and unsafe, so it’s best to keep ahead of the game.
What Should I Inspect My Deck For?
If your deck is more than five years old—or gets a lot of use—be sure to check for the following ASAP:
- Loose boards or railings
- Rusted nails or screws
- Wood rot or soft spots
- Cracks, splits, or popping sounds when you walk
A simple DIY inspection is a great preventative against more serious issues. However, investing in a professional inspection every few years will ensure your custom deck stays safe and sound for the long term.
How Can I Prevent Mold and Mildew on My Deck?
Here’s a quick checklist for preventing mold and mildew growth on your deck:
- Regularly sweep leaves and dirt from the surface
- Wash yearly with a commercial or DIY solution
- Trim nearby plants and trees to reduce shaded areas
- Occasionally rearrange furniture to prevent moisture buildup
Tip: Mold and mildew are more likely to appear on the north side of your home or under heavy shade—both things to consider when planning a backyard deck design.
Is it Safe to Pressure Wash My Deck?
It is safe to pressure wash your deck—with a few caveats. While this cleaning tool is effective, too much pressure or poor technique can actually damage your deck boards.
Here’s how to do it right:
- Use a fan tip and keep PSI under 1,200 for wood decks
- Hold the wand 8–12 inches from the deck surface
- Move in long, even strokes—don’t hover in one spot
- Always test on an inconspicuous area first
While pressure washing may be a common DIY solution, it may be worth hiring a pro or speaking with your local deck repair contractors to avoid potential damage if you aren’t comfortable using a pressure washer.
How Do I Protect My Wooden Deck From Sun Damage?
The sun isn’t messing around. UV rays fade the color of your deck over time, can dry out the wood, and cause cracks and splinters.
But here’s how you can mitigate—and even prevent—the damages.
Wood Decks:
- Apply UV-blocking stain or sealer every 1-2 years
- Choose a light-colored stain to reflect sunlight
- Use outdoor rugs or furniture for protection (be sure to rearrange occasionally for mold and mildew prevention)
How Do I Prevent Warping, Cracking, or Rot on Wooden Decks?
These classic issues are the result of moisture buildup and temperature swings throughout the year. However, there are steps you can take to prevent them.
- Keep the deck properly sealed to prevent moisture intrusion
- Check for proper drainage (or pooling water)
- Replace damaged boards promptly
- Keep the space under your deck well-ventilated
Also, know this: rot starts in areas that stay damp—like where the deck meets the house or under planters—so check these spots regularly. If your deck was installed without proper flashing or ventilation, a consultation with a trusted deck repair contractor might be your best bet.
How Do I Protect My Deck During the Winter?
Winter is tough on decks. And snow, ice, and freezing temps can wreak havoc on your beloved outdoor hang spot—especially if it’s made from wood.
Here’s how to keep your deck protected this coming winter:
- Remove furniture, planters, and rugs toward the end of fall
- Clean your deck thoroughly before winter weather hits
- Reapply sealants if needed (every 1-2 years)
- Use a plastic—not metal—shovel to remove snow (metal causes scratches)
- Refrain from using salt or harsh chemicals unless approved for your composites
What if My Deck is Already Damaged?
If you’re noticing small signs of damage—loose boards, cracked planks, popped nails—these can often be handled as a part of routine upkeep by the homeowner. However, larger issues like structural rot, sagging, or widespread mold are best handled by a professional.
What most homeowners don’t know is that deck repair contractors can restore a deck to like-new condition without having to tear it all out. That being said, larger repairs may present the perfect opportunity to upgrade your outdoor living space once and for all with a custom deck design.
So if you’re in Lancaster, Berks, or Chester County and are looking to refresh your old deck (or build a completely new one customized to your wildest dreams), give Smucker Exteriors a call.
We’ll send out a certified contractor completely free and with zero obligations. And if you decide to move forward with the project, you can rest assured knowing you’re working with a contractor that’s been trusted here in southeastern PA for over 20 years.
So don’t wait. Reach out today for a free quote and initial consultation.
