Should I repair our 25-year-old deck or just replace it with concrete?

At 25 years old, your deck is almost certainly nearing the end of its structural life. Most pressure-treated lumber starts to fail internally around the two-decade mark, regardless of how many times you restain the surface. The fact that youu2019ve got a leaking water table on it just accelerates the rot where the boards meet the joists. Before you commit to a weekend of sanding, you need to pull up two or three of the worst-looking boards and actualy look at the framing beneath them. Take a flathead screwdriver and poke the tops of the joists and the area where the deck attaches to the house. If the metal fasteners are rusted or the wood feels like wet cardboard when you press into it, the structure is shot. Putting new boards on top of rotting joists is just throwing good money after bad. It's a safety hazard, too, especially with kids running around on it. Your wife's instinct about the rot is probly spot on, but I agree that a massive concrete slab can feel a bit sterile. If the framing is shot, consider a **paver patio** or crushed stone instead of just pouring concrete. It drains better, won't crack like a slab, and looks alot more natural against a yard with dandelions and landscaping. Plus, if you ever need to change the layout later, you aren't stuck jackhammering a foot of concrete. I went trough this exact same debate three years ago. I spent two weekends trying to save an old multi-level deck by replacing boards and power washing. By the time I got the old wood off, the joists were so soft I could literally pull the nails out with my fingers. I ended up ripping it all out and putting in a stone patio with a fire pit. Best decision I ever made. No more splinters, no more sanding, and it actually looks better than the old rickety wood ever did.

I’m just starting to look into this stuff because our porch is looking rough, and that screwdriver trick sounds like a lifesaver. I’m curious though, if you switch to pavers or a patio, how do you handle those different levels? I love the tiered look for a grill area, but I imagine building stone steps or retaining walls gets expensive fast.

Also, does anyone have issues with weeds growing between the stones? I’m trying to avoid the high maintenace of wood, but I don't want to spend my weekends pulling grass out of the cracks either. Is there a specific sand or somethig that actually keeps the dandelions out?

Check that ledger board where it meets the house before you do anything. Standards 25 years ago were pretty spotty, and I’ve seen decks that looked fine on top but the house rim joist was basicly mulch from water seepage. That’s the real hidden danger. If the framing miraculously checks out, maybe look into composite. It handles those water table spills way better than wood ever will. But at 25 years? You’re likely looking at a full demo. Just don't underestimate the heat a concrete slab holds in the summer; it can be a real foot-burner for the kids compared to wood or even pavers.

If your back door sits high off the ground, a concrete slab means you'll need a ton of fill dirt or you're looking at a long drop-off from the threshold. Decks are great because they bridge that height gap easily. If you switch to a slab, you lose that level walk-out feel that makes multi-level decks so nice.

One more thing—check your local zoning before you demo. Code requirements for setbacks have changed alot since your house was built. If you tear the whole thing down, you might find out you aren't legally allowed to build back something with that same footprint.