Is it time to replace your decking?

Decking takes a battering. It's out in all weathers, it's walked on daily, and unlike a fence or a shed, it's usually load-bearing right where people stand. Most homeowners don't think about their decking until something goes wrong, a board gives way underfoot, or a section starts to feel spongy. By that point, it's often further gone than it looks.
The warning signs
- Soft or spongy boards when you walk across them, this usually means water has got into the timber and it's starting to rot from the inside.
- Rust-stained fixings around screws or nails, a sign the fixings themselves are corroding and losing their grip.
- Green or black algae building up, especially in shaded corners, which makes the surface slippery as well as unsightly.
- Gaps opening up or boards cupping, timber moves as it dries out and swells, and old decking often wasn't installed with enough of a gap to allow for that movement.
- Visible movement in the frame when you press down near the edges or joints, this points to a problem with the joists underneath, not just the surface boards.
A quick inspection each spring, before the decking sees a full summer of use, catches most of these problems while they're still small.
Repair or full rebuild?
This comes down to what's happening underneath. If the joists and frame are still sound and it's just a handful of boards that have had it, those can usually be replaced individually without touching the rest. But if the frame itself has softened, or the damage is spread across most of the deck, patching individual boards is a false economy. It'll look fixed for a season and then the next board goes.
The only way to know for certain is to get underneath and check the joists directly, not just look at the surface.


What a proper rebuild involves
On a full rebuild, the old boards come up entirely so the joists underneath can be checked and treated, or replaced where needed. New boards go down with a consistent gap for drainage and movement, and the edges get a proper finishing trim rather than just butting up against the patio or the wall. It's slower than a quick patch job, but it's the difference between decking that lasts a couple of seasons and decking that lasts a couple of decades.
"Once the joists are checked and sound, it's worth doing the boards properly rather than patching, it saves calling someone back out in a year."
Keeping it in good shape afterwards
- Give it a proper clean once a year, a stiff brush and decking cleaner shifts algae before it gets a grip.
- Re-oil or re-stain every year or two depending on exposure, it's the finish that takes the weathering, not the wood itself.
- Keep planters and furniture legs off direct, permanent contact with the boards where you can, trapped moisture underneath is what starts most rot.
Got decking that's seen better days? Sean can take a look and tell you honestly whether it needs a repair or a rebuild.
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