Deck stair repair
Deck stair repair is the most safety critical work in our whole small jobs list, because deck stairs fail from the bottom up and they fail where nobody looks. A flight that feels slightly springy in September is a flight with a rotten stringer end sitting in wet soil, and that is the part carrying every step you take. It sits inside our deck repair service.
Service family Deck repair
Scheduling Monday through Friday, 8 a.m. to 4 p.m.
Service area Six counties across Southeast Michigan
Phone (734) 540-0347
What deck stairs have to do
Carry load, resist racking side to side, stay attached at the top, bear properly at the bottom and give you a consistent rise all the way down. Five jobs. Most residential deck stairs were built to do the first and third well and the rest approximately, and twenty Michigan winters find the difference every time.
Where deck stairs fail
At the bottom of the stringers, sitting on or near soil. At the notch where each tread bears, which is end grain facing up and holding water. At the top connection, where the stringer meets the rim and was often just nailed. And at the handrail, which is loose on nine out of ten decks we look at. That list is the whole inspection.
The stringer, and the notch that rots
A cut stringer is a board with triangular notches sawn out of it, which means every tread sits on exposed end grain with the cut fibres pointing upward. Water sits there. On an unsealed stringer those notches soften first, and the tread begins to tip forward under load before anything visible happens. Probing them with a screwdriver is how we find it.
What gets checked first
- The bottom six inches of every stringer, probed rather than viewed
- What the stringers bear on, and whether it drains
- The top connection, and whether it is fastened or only nailed
- Rise measured at every step including the bottom one
- The handrail and any guard, pushed hard in both directions
The bottom of the stringer and the ground under it
Wood in contact with soil rots, and a stringer end buried in mulch or grass has been wet for years. The repair is to cut the failed end back to sound material and rebuild the bearing so the wood sits above grade on concrete or a proper pad, clear of splash and snow. Doing that once ends the problem for the life of the deck.
A proper landing pad
A flight of stairs needs something solid and draining to land on. A concrete pad, a set of pavers on compacted base, or a poured footing under each stringer all work. Bare soil, a patch of gravel that has spread, or two paving slabs sinking at different rates do not. The pad is also what keeps the bottom step at the right rise as the ground settles.
Treads that have cupped or split
Deck treads weather faster than the deck field because they take rain, boots and salt. A cupped tread holds water across its width and freezes into a skating surface. A split tread is a foot trap. Both get replaced, and where the whole flight is tired, replacing every tread at once costs little more than doing half of them and matches better.
Rise consistency on an outdoor flight
The variation between the tallest and shortest step in a flight is what trips people, and outdoors it changes over time as the landing settles. The bottom step is nearly always the odd one. Where we rebuild a landing we reset that rise to match the rest of the flight, which is the single most useful safety improvement available on most deck stairs.
Handrails, and the grip they need
A handrail has to be graspable, which means a shape your hand can actually close around rather than a wide flat board on edge. It has to be continuous down the flight and it has to be attached to something structural. A rail screwed into a post that wobbles is worse than no rail, because it invites weight it cannot carry. That work sits with stair railing installation.
Guards on the open side
An open sided flight needs a guard with balusters spaced closely enough that a small child cannot pass through, and the spacing rule is one of the details most older decks miss. Where we rebuild a stair guard, the spacing goes to current practice rather than matching whatever is there. The same applies to the deck guard, which is deck railing repair.
Fasteners, and why the old ones failed
Smooth shank nails in a tread back out with every freeze and thaw, which is why old deck stairs are full of raised nail heads. Structural screws and connectors rated for exterior use, in the right size, do not. Anything in contact with treated lumber also has to be rated for it, or the fastener corrodes from the inside and shears under load.
The attachment at the top
Where the stringers meet the deck framing is the connection that matters most, and on older decks it is often three nails toe driven into the rim. Proper stair hangers or a ledger with structural screws transform it. This is the failure that hurts people, and it is the first thing we look at on any deck built before about two thousand.
Wood choice for stair parts
Treated southern pine is the standard and it works, provided it is rated for ground contact where it needs to be. Cedar is nicer underfoot and softer, so it wears faster on a tread. Composite decking makes an excellent tread and cannot be used as a stringer, because it is not structural. We mix materials deliberately rather than building the whole flight from one thing.
Slip resistance in a Michigan winter
- Treads that drain rather than holding water across the width
- A grit strip or grooved tread on a north facing flight
- Snow and ice cleared to the wood rather than left to compact
- Salt kept off treated wood, which corrodes fasteners
- A light at the top and the bottom of the flight
Where repair stops and rebuild starts
One rotten stringer end, a few treads and a loose rail is a repair and a good use of a day. Three soft stringers, a sinking landing and a top connection that was never right is a new flight, and a new flight is safer and often cheaper than three visits. Where the whole deck is in that condition, it is a deck construction conversation instead.
The rest of the deck while we are there
Stairs are rarely the only tired part. Deck board replacement, deck skirting and grading or downspout drainage that is keeping the stair base wet all get dealt with in the same visit, which is how the repair lasts rather than repeating.
How long the work takes
Rebuilding the bottom bearing of a flight and replacing a few treads is a day. A new landing pad plus a rebuilt flight is two, with a return if concrete needs to cure. Spring is the right season, under a spring opening package, and autumn under fall winterization before the freeze arrives.
Book deck stair repair with our crew
Take a screwdriver outside and push it into the bottom of each stringer where it meets the ground, then grab the handrail and pull hard. Those two tests tell you most of what we would find. Our exterior repair crew covers Dexter and the wider area, we handle accessible access where someone is struggling with the flight, and stairs turn up on most home inspection repairs lists. An annual home check catches the rot early. View our Portfolio, then contact us now for a free quote.
