The short version: on the Grand Strand, a pool deck and a screened lanai get dirty as two different jobs that meet in the middle of one backyard, and the mistake most crews make is treating the whole space as one pressure-washable slab. The screened enclosure collects black mildew on the mesh and the aluminum framing because shade and trapped humidity hold it damp; the deck around the water turns slick with algae on the concrete, in the paver joints, and on the pool tile. Cleaning the lanai calls for a soft wash that lifts the film without bending a screen panel or popping a spline, while the deck takes pressure matched to whatever it is actually made of. Get both right and you end up with a non-slip surround and a screened room that reads clean from the moment you step into it.
Why a Myrtle Beach pool deck and lanai go green the way they do
Two local conditions set the pace for every pool space in Horry County. The first is the ocean. Salt blows in on the onshore breeze as a fine, unseen film, and being salt it is naturally moisture-attracting: it draws water out of the humid air and keeps that dampness against the surface it settled on. A screened enclosure makes that worse: the screen traps air the way a greenhouse does, so the mesh, the framing, the screen corners and the underside of the roof all stay damp well after the rest of the yard has dried. That still, salt-tinged dampness is exactly what black mildew and green algae need to establish and spread, which is why the inside of a lanai goes dingy before the open parts of the lot do.
The second condition is the shade and the sprinklers. Most Grand Strand backyards are planted against the house with beds of palmetto, loropetalum and pine, and the shade they throw keeps the north edge of a pool deck damp through the morning. Where the irrigation heads clip the deck, groundwater here carries dissolved minerals that bake into white deposits on hot concrete in the summer. So a pool deck collects a film that is part living growth, part salt, and part mineral spotting, and a plain rinse never touches it.
Rental turnovers are the real schedule, not the season
Myrtle Beach runs on short-term vacation rentals, and the pool surround tends to be the first part of the property a new guest walks out onto. Between the Memorial Day rush and the fall shoulder season, the houses and villas on the rental side of Ocean Boulevard and the lagoons off the Intracoastal flip by the week, and the deck by the water is graded by strangers within their first minutes on the property, against the pictures they booked from. That reshapes when it makes sense to clean. An owner-occupied home can wash the deck in the spring and let it ride; a rental wants the surround looking its best in the weeks leading up to the summer season, and once more ahead of the fall bookings, because that is exactly when the property is being scored. And because the algae film asserts itself hardest in the warm, damp months, a clean done before the busy stretch carries that fresh look through the weeks that matter. Manage several Grand Strand rentals and putting the pool deck on the turnover checklist, rather than chasing individual stains through the summer, keeps every unit on the block presenting the same.
The enclosure and the deck are two separate jobs
Most owners describe it as one thing - "the pool deck is dirty" - but two distinct problems settle on opposite halves of the space, and each needs its own method. The screened lanai is the fast one to turn dingy and the easiest to damage. Mildew climbs the fiberglass or aluminum screen mesh and darkens the painted framing, and the junction where a screen panel meets its framing member holds moisture almost without relief through the summer. That half of the job is a soft wash: a cleaning solution laid on at low pressure, given time to work, then rinsed, so the growth lets go without bowing a screen panel, bending a rail, or forcing the mesh free of its spline. A pressure wand aimed at the mesh will bow a panel and pop the screen out of the track, and the fix is rarely cheap.
The deck below is the pressure half of the job, but only up to what the surface can take. A plain concrete pool surround takes a shrouded surface cleaner at real pressure and comes back to a clean, even, non-slip finish. Concrete pavers are the one surface that asks for restraint: the sand filling the joints is what keeps the whole surface level and stable, and a high-pressure wand fired straight down a seam blasts that sand out, leaving pavers that shift underfoot, drop at the edges, and invite weeds into the open joints. Stamped or colored concrete, which surfaces on the golf-course communities and the newer lagoon-side builds, deserves the gentlest hand of the three finishes: the decorative stamp and the integral color are locked into only the top layer of the slab, and a careless wand can scar the pattern or lift the dye before anyone notices. The cleaner and the pressure we bring are chosen for the specific surface, never a single machine setting applied everywhere at once.
The coping, the waterline tile, and the spots a wash is really about
The parts of a pool space that get genuinely dirty are rarely the wide open deck. The concrete coping that rims the pool holds a scum line where the water meets the surface, and the waterline tile - the band of glass or ceramic just above the water - collects algae, calcium and the sunscreen-and-body-oil film that floats on the surface and rides the tile as the water level moves. That band is the part a guest actually sees across the pool, and it is the part a surface cleaner aimed at the open deck will miss entirely. We clean the coping and the waterline tile directly as part of the job, with the chemistry chosen so nothing harmful reaches the water, and we flush the tile line before it dries back to a haze.
The dim corners are the other place the work actually hides: behind the pool filter housing, under the steps, in the shade of the screen wall, and in the joint where the deck meets the house. Mildew roots in those pockets first and spreads outward, which is why a deck can look clean from the center and still be going grey at the edges. We treat the corners as part of the surface rather than ignoring them as out-of-the-way, because that is where the regrowth starts.
Salt systems, chlorine and what the water does to the deck
A fair share of Grand Strand pools run salt-chlorine generators, and owners sometimes worry that the wash will fight the chemistry. It will not, but the two things need to be handled honestly. First, salt-laden water splashes out of the pool onto the surrounding concrete and, on a hot day, dries and leaves a white residue exactly like the salt film from the ocean breeze - which is why the deck immediately around a salt pool can look chalky even when nothing is growing. We rinse that band well so it does not bake in. Second, we keep the cleaning solution out of the pool. The deck and the lanai floor are cleaned with the runoff directed away from the water and the plants, and we never let a concentrate sit where it can wash into the pool and upset the balance. A rinse plan comes before a wand plan on any pool space, and that is not optional when the deck surrounds a body of water.
What will come off, and what a wash will not fix
The living growth on a pool deck - algae, mildew, the black film on the screen - comes off completely once it is killed to the root, and the deck stays clean longer for it. Salt residue and mineral spotting rinse away. Two things do not fully come back with any wash. Tile that has been etched by years of hard-water scale or a poorly balanced pool is no longer a cleaning job; the surface has been damaged and needs replacement or a specialist restoration, and we will say so up front rather than sell you a cleaning that cannot fix it. And screen mesh that has gone dull grey from years of salt corrosion is usually not dirty either - the oxidation is in the mesh itself, and no cleaning restores it; new screening is inexpensive and is a far better answer than a second cleaning of the old. We point at both honestly before you book, because the difference between a job that transforms the space and one that disappoints is knowing which of these you are looking at.
Timing and what the job involves
On an owner-occupied Grand Strand home, the best window for a pool deck and lanai clean is after the spring pollen has finished dropping and before the summer humidity sets the growth in for the season, with a lighter touch-up in the fall as the rentals wind down. For a rental, the deck wants to be at its sharpest in the weeks right before the summer bookings start and again ahead of the fall shoulder. The enclosure and the deck are cleaned in the same visit so the runoff is managed once and the screen is not re-soiled by washing the deck under it afterward. When the whole property is due at once, the sensible pairing is to have the house and the pool surround done together, with the deck and lanai sequenced after the walls have been rinsed so dirty water does not run back over the clean enclosure. The pool water and the planting beds are protected throughout, and the deck is left dry and non-slip - ready to be walked on in bare feet, which is the whole point of cleaning it in the first place.
