Somewhere between a board that feels a bit soft and a frame that’s quietly given way, there’s a line. On one side, your deck just needs a repair and you’ll spend a fraction of what you feared. On the other, you’re patching a deck that’s failing underneath, and every euro spent is good money after bad. The hard part is knowing which side you’re on, and plenty of people get talked onto the wrong one. Here is the honest way we work it out, the same checks we’d do standing in your garden.
Call Seamus on 085 168 5170 for a free, honest assessment or message us on WhatsApp. If you want the full picture of what’s involved either way, our deck repairs and restoration page lays it out.
The One Question That Decides It: The Subframe
Forget the boards for a minute. The boards are what you see, but they’re not what decides this. The frame underneath - the joists, the posts, the bearers carrying the whole thing - is what decides whether you’re looking at a repair or a rebuild.
Here’s why. Boards are replaceable. We can cut out a few soft ones and lay new timber in a morning. But the frame is the deck. If the joists are rotten or a post has gone soft where it meets the ground, no amount of fresh boards on top fixes that, because you’ve laid them on something that’s already failing. Within a year or two the new boards are sitting on a frame that’s still rotting, and the bounce, the sag and the soft spots come straight back.
So the real test is simple: is the damage on top, or underneath? Surface and board damage on a sound frame is a repair. A compromised frame is a replacement. Everything else follows from that.
How We Actually Check (and How You Can)
You don’t need to be a tradesman to get a rough read on your own deck before we even arrive.
- The screwdriver test. Push a screwdriver firmly into the joists, the posts and the board ends. Firm, healthy timber resists it. If the tip sinks in more than a few millimetres without real force, the fibres have broken down and that’s structural rot, not surface wear. This is the single most telling check, and it’s the same one the trades use (the screwdriver test on framing).
- The bounce. Walk the deck. A bit of give is normal. A spongy, bouncy feel even in the middle of a board, or a section that dips, points to the frame, not the surface.
- The posts at ground level. This is where Irish decks fail most. Posts buried straight in the soil, rather than sitting on a proper footing, wick damp up out of sight and rot below the ground line. If your posts go straight into earth, check them hard.
- The handrail. A rail that gives or wobbles is a fixings or a post issue, and a safety one. A chartered building surveyor writing in the Irish Times flagged exactly that “give in the handrail” as a sign the structural timber, not just the boards, needs looking at.
When we come out, we get under the deck where we can and do these checks properly, because the bit you can’t see from above is the bit that matters.
A Quick Word on Why Timber Rots
This helps you judge your own deck honestly. Wood doesn’t rot just from being rained on. It rots where water sits and can’t dry out, and where bare cut ends soak damp up out of sight. A frame with no air gap beneath it, poor drainage and unsealed timber traps moisture and feeds the fungus that breaks the wood down.
That’s why a repair that only swaps the soft boards and ignores the cause will rot again. The same surveyor recommended that any new decking be set on a slight slope so rainwater runs off along the grooves rather than pooling. A sound repair or rebuild does the same: it gets air and run-off back under the boards, sits the posts up off damp ground on ground-rated timber and footings, and seals the bare ends, so the new work lasts rather than going the way of the old.
Weighing the Cost Honestly
Once you know whether it’s a repair or a rebuild, the money usually makes the decision for you, and there’s a sensible rule of thumb the trade uses.
If the repair would cost less than roughly half the price of a full rebuild, and the frame is sound, repair it. If the repair creeps past about half the cost of starting again, or the frame is gone, a rebuild is the better value. The logic is simple: a repair on a sound frame buys you many more years of a deck that’s fundamentally fine. A repair on a failing frame buys you a season or two before the next weak point gives way (the threshold and lifespan trade-off). Spending half the cost of a new deck to get one more year out of an old one is the worst of both worlds.
We won’t quote you a flat figure online, because no two of these jobs are the same. Swapping a couple of boards is a small afternoon. A clean, sand and re-stain of a tired deck is more. A subframe fix or a full tear-out and rebuild is a bigger job again. After we’ve seen it, you get a fixed, written, itemised price so a small repair stays a small repair on the bill. For the ranges decking work falls into, our blog on what decking repairs cost in Ireland goes through it properly.
Repair, Restore, or Replace: The Short Version
Most decks we look at land in one of three places.
- Repair when the frame is sound and the damage is cosmetic or localised: a few soft boards, a loose rail, a board that’s split. You’re fixing the symptom on a healthy deck.
- Restore when the timber is sound but tired: grey, dull, a bit green. A clean, a sand and a re-stain or oil brings it back for a fraction of a rebuild, no new timber needed.
- Replace when the frame has failed: rotten joists, soft buried posts, a deck that’s sinking, sagging or pulling away. New boards can’t save a frame that’s gone, so the honest job is a clean tear-out and a proper rebuild.
If you want help spotting which one you’re looking at, our guide to the signs a deck needs replacing walks through the same warning signs we check for.
The thing we’ll never do is talk you into the bigger job. If a repair will genuinely do, that’s what we’ll quote. If it won’t, we’ll tell you why, and you can decide with the full picture in front of you.
Get an Honest Assessment
We’re a Dundalk father-and-son team, Seamus and Pete, and we’ve repaired, restored and torn out enough decks across Louth - from Blackrock and Carlingford to Ardee, Castlebellingham and the Cooley peninsula - to call this honestly. Before you write your deck off, or pay to patch one that’s past it, let us look at the frame. Call Seamus on 085 168 5170 for a free, itemised assessment, or message us on WhatsApp.