{
  "store": "Decking Pedestal Company",
  "website": "https://deckingpedestal.co.za",
  "currency": "ZAR",
  "count": 4,
  "products": [
    {
      "id": "adjustable-deck-pedestal-10-pack-18-30mm",
      "sku": "adjustable-deck-pedestal-10-pack-18-30mm",
      "title": "Adjustable Deck Pedestals 18-30mm (10 Pack)",
      "slug": "adjustable-deck-pedestal-10-pack-18-30mm",
      "price": 966.99,
      "currency": "ZAR",
      "availability": "in_stock",
      "category": "deck-pedestals",
      "category_label": "Deck Pedestals",
      "tags": [],
      "colors": [],
      "materials": [],
      "dimensions": null,
      "weight": "720 g",
      "images": [
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      ],
      "description_short": "Each pedestal screws straight to your joist and dials between 18mm and 30mm, so you can correct dips, lift timber clear of damp ground and keep water moving instead of pooling.",
      "description": "The problem with building low\n\nEvery low deck starts the same way. You stand on the slab or the paved area, you lay a straightedge across it, and you find out the ground is not flat. It never is. Slabs are poured with a fall so water runs off. Paved areas settle. Compacted gravel moves a few millimetres here and there over a wet season. None of that is a fault, it is just how outdoor surfaces behave.\n\nThen you have to build a flat timber floor on top of it.\n\nThe old answer is packers. Offcuts of treated pine, scraps of hardwood, a bit of plastic from the shed, whatever is lying around. They work on day one. The trouble shows up later. Timber packers absorb water, compress and rot. Thin ones split under load. And because each one is a different thickness, you end up with a floor that is level in some spots and a whisker out in others. That whisker is what you feel when a board flexes under your heel and the deck lets out a creak.\n\nAdjustable deck pedestals exist to get rid of the packer pile. Instead of hunting for a 23mm offcut, you set the support to 23mm and move on.\n\nWhat these ones do\n\nThis pack holds ten deck support blocks, each one adjustable between 18mm and 30mm. That is a narrow, deliberate range. It is aimed squarely at decks sitting close to an existing hard surface, where you need to take up the fall on a slab, bridge a settled paver or simply lift the frame off the ground so water can get away.\n\nThe body is moulded from high-strength PP. The maker chose it for corrosion and oxidation resistance, and states it does not easily deform, age or crack after long exposure to sun, rain and frost. For anyone building in a hot, wet climate, that matters more than it sounds. A support that spends ten summers baking and ten winters soaking has to hold its shape or the whole floor shifts with it.\n\nUnderneath, the base is rounded. That shape helps push the load down into the surface below instead of concentrating it on a corner, and it is part of why the maker describes the structure as resistant to breakage and bending. In plain terms, it is what keeps the deck from feeling springy or rocking under your weight.\n\nThe top plate has small holes in it. Screws go through those holes and into the joist, which locks the support to the frame. That is the whole fixing method. No concrete, no curing, no coming back tomorrow.\n\nWho they suit\n\nThey suit anyone building low and building on something firm. Decks over a concrete slab. A landing outside a back door. A walkway through a garden. The floor of a garden shed sitting on a pad. A multi-level deck where one tier only needs to rise slightly above the next. Greenhouse flooring, where keeping timber out of constant damp is half the battle.\n\nThe listed compatible materials cover a wide spread: outdoor treated timber, WPC flooring joists, various types of stone, engineered mesh flooring, greenhouse flooring and pipework. If you are hunting for adjustable decking feet for a composite frame, the WPC compatibility is worth noting, because composite joists are often fussier about support than timber.\n\nThey do not suit a deck that needs to sit well above the ground. Thirty millimetres is the ceiling here. If you are building over sloping garden ground, or you want a usable space underneath, you need a taller pedestal system or a proper pier and post structure.\n\nThey also do not suit soft ground on their own. Set a pedestal straight onto loose soil and it will find its own level over the first wet month, usually a few millimetres lower than where you left it. Put a paver or a compacted pad under each one and the problem goes away.\n\nWorking out how many you need\n\nThis is where most people get caught out. Ten sounds like a lot until you draw the layout.\n\nSupport spacing depends on joist size, board thickness, board direction and the load you expect the deck to carry. Follow the span tables that apply where you live, and check local building rules before you commit. As a rough feel, a lot of low decks place a support every 400mm to 600mm along each joist, and closer where boards cantilever at an edge or where a step lands.\n\nDo the maths on paper first. Draw the deck to scale, mark the joists, then mark a dot at every support point. Count the dots. That number, rounded up, is how many pedestals you need. A small landing might take eight. A three by four metre deck will take several packs.\n\nIt is cheaper to order one pack too many than to stop work halfway and wait for a delivery.\n\nGetting the install right\n\nThe fitting is simple, but the setting out is what decides whether the deck feels solid.\n\nStart with a reference. Run a tight string line, or lay a long straightedge with a level on it, across the full area at your finished frame height. Everything else gets measured off that one line, not off the ground. Measuring each spot from the slab is the fastest way to end up with a wavy floor, because the slab is the thing you are correcting for.\n\nSet each pedestal to touch the line, then fix the screws through the top plate into the joist. Work in a sequence rather than jumping around, so you always have a fixed reference beside you. Check with the level often.\n\nOne genuinely useful feature here is that the height can still be changed after installation. If a corner settles over the first wet season, you can get underneath, back the screws off, re-dial that support and bring the floor back to flat. On a deck sitting on concrete piers, that kind of correction means pulling boards.\n\nLooking after them\n\nThere is very little to do. The maker states no maintenance is required during use and the material will not rust or crack.\n\nIn practice, two small habits help. First, keep the space under the deck clear. Leaves, soil and grit pack in around the bases over time and block the drainage path you built the deck to have in the first place. A hose or a leaf blower once or twice a year sorts it. Second, check the fixing screws after the first season. Timber moves as it dries out, and a screw that was tight in autumn can be a little loose by the following spring.\n\nNo oil, no paint, no sealer. Plastic supports in shade are about the lowest-maintenance part of any deck.\n\nHow they compare\n\nAgainst concrete piers, the trade is adjustability and weight against raw mass. Piers are fixed once set and heavy to move, but they carry very large loads. Pedestals adjust, weigh almost nothing and fit in a shopping bag. For low work on an existing hard surface, most people find the pedestal faster by a wide margin.\n\nAgainst timber packers, there is not much of a contest outdoors. Packers rot, compress and feed termites. These do none of those things.\n\nAgainst taller pedestal systems, it comes down to height. If your range is 18mm to 30mm, this pack is cheaper and simpler. If you need 80mm, buy the taller one.\n\nThe short version\n\nIf you are building low on a slab, a paved area or a firm compacted pad, and you need to take up a small amount of fall to get a flat floor, this is the right kind of hardware. Ten supports, each dialling from 18mm to 30mm, screwed through the top plate into your joists. PP body chosen for weather resistance, rounded base for stability, adjustable again later if the ground moves.\n\nDraw your layout, count your support points, order enough, and set everything off one string line. Do that and the deck will feel solid the day you finish it and still feel solid five years on.",
      "llm_summary": "Adjustable deck pedestals sold as a pack of ten, made by Trituke under part number GHB-89H6. Each support adjusts in height from 18mm to 30mm and is moulded from high-strength PP, a material the maker describes as resistant to corrosion and oxidation and unlikely to deform, age or crack outdoors. The base is rounded to help spread load and limit deck sway. Fitting is by screws through holes in the upper plate into the joist, and height can be readjusted after installation if the ground settles. Listed uses include decks, patios, multi-level decks, walkways and sheds, with treated timber, WPC joists, stone and mesh flooring. Colour is black, pack weight 720 g. No load rating is specified in this record.",
      "returnable": true,
      "return_policy": "Voluntary 14-day change-of-mind returns in original condition, buyer pays return postage; Consumer Protection Act 68 of 2008 consumer guarantees for faulty goods. Return postage on faulty goods is ours.",
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      "brand": "Decking Pedestal Company",
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      "condition": "new",
      "url": "https://deckingpedestal.co.za/adjustable-deck-pedestal-10-pack-18-30mm/",
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      "updated_at": "2026-10-14"
    },
    {
      "id": "adjustable-deck-pedestal-12-pack-30-60mm",
      "sku": "adjustable-deck-pedestal-12-pack-30-60mm",
      "title": "Adjustable Deck Pedestals 12 Pack (30-60mm)",
      "slug": "adjustable-deck-pedestal-12-pack-30-60mm",
      "price": 897.99,
      "currency": "ZAR",
      "availability": "in_stock",
      "category": "deck-pedestals",
      "category_label": "Deck Pedestals",
      "tags": [],
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      "materials": [],
      "dimensions": null,
      "weight": "1.36 kg",
      "images": [
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      ],
      "description_short": "Twelve height-adjustable deck support blocks in high-strength PP, tuneable from 30mm to 60mm, with a screw-fixed top plate and a rounded base that spreads load and resists swaying.",
      "description": "The problem with low decks\n\nBuilding a low deck looks simple until you lay the first joist and realise the ground underneath is a landscape of humps and hollows. Nothing in a backyard is flat. The dirt near the house has usually been built up, the far corner has settled, and somewhere in the middle there is a tree root doing its own thing.\n\nThe traditional answers are slow or temporary. Pouring concrete piers means digging holes, mixing, waiting for it to cure, and then discovering your string line was 10mm out. Packing the frame with offcuts, bricks and bits of paver is quick, but those packers slip, rot, crush or sink. A deck built on packers feels fine in week one and squeaks like a floorboard in a haunted house by the following winter.\n\nAdjustable deck pedestals sit between those two options. Each one is a small screw jack. You place it, wind it to the height you want, screw the frame to the top plate, and move on. The whole job of getting a deck level becomes a twist rather than a dig.\n\nHow these pedestals work\n\nEach pedestal in this pack is a two-part moulded unit that winds between 30mm and 60mm. The base is rounded underneath, which spreads the load into whatever it is sitting on and helps the pedestal stay steady instead of rocking on a point. The top is a flat plate with small holes drilled through it.\n\nYou set the pedestals out under your frame, wind them roughly to height, drop the joists on, then fine-tune. Once everything reads level, screws go through the holes in the top plate and up into the joist. That single step is what turns a stack of parts into a structure, because the deck and the supports now move as one piece rather than sliding past each other.\n\nThe 30-60mm range is deliberately shallow. These are made for low floating decks, patio top-ups, walkways, shed floors and raised mesh or greenhouse floors. If you want to stand a deck half a metre off the ground, you are looking at a different product entirely. If you want a deck that sits just clear of the dirt with airflow underneath, this range is right in the sweet spot.\n\nThe material is high-strength PP. The maker says it resists corrosion and oxidation and holds its shape under long exposure to sun, rain and frost without deforming, ageing or cracking. Plastic has a real advantage in ground contact. It does not rot like timber, it does not rust like steel, and termites have no interest in it.\n\nWho these suit\n\nThey suit the person building a small to mid-size low deck over soil, gravel or an old slab. They suit anyone putting down a shed floor and wanting it level without laying a new concrete pad. They suit walkway projects across uneven ground, and they suit people topping an ugly but sound existing patio with timber or composite boards.\n\nThey also suit anyone who has already built something and watched it settle. Because the thread stays live after installation, you can go back and re-level a sagging corner without pulling boards up. That is a feature you only truly appreciate the second summer.\n\nThey are less suited to high decks, decks that carry heavy fixed loads like spas, or anything that falls under building approval where an engineer has specified footings. The maker does not publish a kilogram load rating for these pedestals, and we are not going to invent one. If your project is structural, get local advice.\n\nWorking out how many you need\n\nThis is where most people under-order. The number of pedestals comes from your joist layout, not from the deck's area.\n\nStart with your board thickness, because that sets how far your joists can span. Thin boards want closer joists. Then set your joist spacing, commonly 400mm to 600mm centres on residential low decks. Then decide how often you will support each joist along its length. Multiply those numbers out and you have your pedestal count.\n\nA quick worked example. A deck three metres by three metres, with joists at 450mm centres, gives you roughly seven joists. Supporting each of those every 600mm along its three metre run means about six supports per joist. That is forty-two pedestals, or four packs of twelve. People who buy one pack for a three by three deck end up making a second order.\n\nIt is worth laying it out on paper, or chalking it on the slab, before you buy. The strongest deck support blocks in the world will not help if there are not enough of them.\n\nGround preparation still matters\n\nA pedestal transfers load down into whatever is under it. If that is loose soil, the pedestal will eventually press into the soil and your lovely level deck will develop a dip.\n\nThe usual fix is simple. Sit each pedestal on a paver, a small compacted gravel pad or an existing concrete surface. That gives the rounded base a firm, broad bearing area. On a slab or old patio you can skip this entirely and place the pedestals straight down.\n\nDo not sit them in a hollow where water collects. Standing water will not harm the plastic, but it will soften the soil underneath and move the whole thing. Shape the ground so water drains away, then set your supports.\n\nGetting it level\n\nWork from the highest point of your ground, not from one edge. If you start at a low corner you will run out of adjustment on the high side and have to start again.\n\nRun a string line or a long straight edge across the frame. Wind the pedestals under that line until each joist sits true. Check across the deck as well as along it, then check the diagonals. On a small deck a two metre level will do the job. On anything bigger, a string line and a water level or laser is faster and more honest.\n\nOnce you are happy, screw the top plates to the joists. Use exterior-grade fixings. Stainless or hot-dip galvanised screws are worth the extra few dollars outdoors, because a rusting screw head is a nasty thing to find in a timber joist in three years.\n\nDrainage, airflow and the long game\n\nThe real reason low decks fail early is water. Boards that sit against damp ground never dry out. The underside stays wet, the timber softens, and the whole thing goes spongy while the top surface still looks fine.\n\nLifting the frame even 30mm changes that. Air moves under the boards, water runs away rather than pooling, and the timber dries after rain instead of staying damp for days. That small gap is also handy for running a hose line, a drainage pipe or some conduit.\n\nThe one maintenance job that matters is clearing out leaf litter. A deck on pedestals with 40mm of compacted leaves underneath has no airflow at all, so you have spent money for nothing. Blow it out or hose it through once or twice a year.\n\nCare and checking in\n\nThere is almost nothing to do with the pedestals themselves. Rinse grit out of the threads before you install so they wind smoothly. After that, leave them alone.\n\nThe habit worth building is a check after the first wet season. Ground moves most in its first year under a new load. Walk the deck, feel for any soft or bouncy spot, and wind the relevant pedestal up a turn or two if you find one. Five minutes then saves a rebuild later.\n\nAvoid solvents and strong cleaners on the plastic. Soap and water is all it ever needs.\n\nThe short version\n\nThese are twelve adjustable support blocks that wind between 30mm and 60mm, made from a tough outdoor PP, with a rounded base for stability and a drilled top plate so you can screw them to your joists. They turn levelling a low deck from a digging job into a twisting job, and they stay adjustable long after the boards are down.\n\nBuy enough of them, sit them on something firm, screw them to the frame properly, and clear the leaves out once a year. Do those four things and you will have a deck that stays flat and dry for a very long time.",
      "llm_summary": "The Adjustable Deck Pedestals 12 Pack is a set of twelve height-adjustable deck support blocks supplied in black. Each pedestal adjusts between 30mm and 60mm to level low decks, patios, walkways, multi-level decks and shed floors. The body is moulded from high-strength PP, described by the maker as corrosion and oxidation resistant and resistant to deforming, ageing or cracking under sun, rain and frost. A rounded base spreads load, and the flat top plate has holes for screwing directly to joists. Packaged dimensions are 25 x 25 x 22.2 cm and the pack weighs 1.36 kg. Country of origin is China. No load rating in kilograms is specified in this record, and colour and material fields beyond PP are not specified.",
      "returnable": true,
      "return_policy": "Voluntary 14-day change-of-mind returns in original condition, buyer pays return postage; Consumer Protection Act 68 of 2008 consumer guarantees for faulty goods. Return postage on faulty goods is ours.",
      "shipping_profile": "standard",
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      "brand": "Decking Pedestal Company",
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    {
      "id": "adjustable-deck-pedestal-12-pack-60-135mm",
      "sku": "adjustable-deck-pedestal-12-pack-60-135mm",
      "title": "Adjustable Deck Pedestals 12 Pack (60-135mm)",
      "slug": "adjustable-deck-pedestal-12-pack-60-135mm",
      "price": 1703.99,
      "currency": "ZAR",
      "availability": "in_stock",
      "category": "deck-pedestals",
      "category_label": "Deck Pedestals",
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      "dimensions": null,
      "weight": "3.4 kg",
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      "description_short": "Twelve height-adjustable pedestals wind from 60mm to 135mm, lift timber and composite joists clear of wet soil, and can be re-levelled later if the ground shifts.",
      "description": "The problem with flat ground that is not flat\n\nAnyone who has set out a deck frame knows the feeling. You measure, you square it up, you drop it onto the ground, and one corner floats two centimetres in the air. Lawns slope. Old slabs have a fall built in for drainage. Crusher dust settles unevenly after rain. Even a surface that looks level to the eye will usually be out by enough to make the finished deck rock.\n\nThe old fix was packers. Bits of treated pine, broken pavers, folded damp-proof course, whatever was lying around. They work for a while. Then the timber rots, the pavers crack, the packers slip, and you are back under the deck with a crowbar wondering how it all got so sloppy.\n\nAdjustable deck pedestals replace guesswork with a dial. Each support winds up or down to its own height, so the joist above it sits exactly where you want it. Set it once, check it with a level, and move on.\n\nHow these pedestals work\n\nThe design is simple on purpose. A broad base sits on the ground or slab. Above it, a threaded column screws in and out to change the overall height, in this case anywhere from 60mm to 135mm. On top sits a plate with small screw holes, which you fix to the underside of your joist with outdoor screws.\n\nThat rounded base matters more than it looks. A wider footprint spreads the load over more ground, which is what stops a support slowly pushing into soft soil. The maker notes the base design helps the deck resist swaying and tilting, and in practice the difference between a firm deck and a bouncy one is usually how well the load is spread at the bottom.\n\nThe column is moulded from high-strength PP. That is a plastic chosen for outdoor work because it does not rust, does not rot, and keeps its shape through sun, rain and frost. In a country where a deck can sit at fifty degrees in the sun one week and under a storm the next, that stability is the whole point. Steel feet rust. Timber blocks rot and attract termites. Plastic just sits there.\n\nGood deck support blocks let you fix a mistake later. These do. If a pedestal settles after the first wet season, lift a board, reach the collar, and turn it until the joist comes back to level.\n\nWho this set suits\n\nTwelve pedestals with a 60mm to 135mm range covers a specific kind of job, and it is worth being honest about which jobs those are.\n\nThey suit low floating decks, the sort you build on a lawn or over an existing slab without digging post holes. They suit landings, platform steps and short raised walkways through a garden. They suit shed and greenhouse floors, where lifting the bearers clear of the dirt is the difference between a floor that lasts and one that goes soft in five years. They also work under runs of pipework that need to sit off the ground with a consistent fall.\n\nWhat they are not is a post system. If you need to stand a deck a metre off the ground, or you are building over a steep drop, you need stirrups, posts and proper footings, and probably a conversation with a builder. These pedestals live in the low-level world, and they do that job well.\n\nWorking out how many you need\n\nThis is where people under-order. Twelve sounds like a lot until you draw the frame.\n\nStart with your joist spacing, which for most timber decking is 450mm centres and for many composite boards is 300mm or 400mm. Check what your board manufacturer specifies, because composite in full sun needs closer support than people expect. Then work out your bearer or joist support spacing along each run. A support point every 600mm to 900mm along a bearer is a common starting figure, but your framing plan should drive it.\n\nMultiply the rows by the points per row, add a couple of spares, and that is your number. A three metre by two metre platform will often need more than one pack. Ordering them together keeps the batch consistent and saves a second delivery wait.\n\nGetting the base right\n\nThe pedestal is only as good as what it sits on. This is the part that separates a deck that stays level from one that sinks in a corner.\n\nOn an existing concrete slab you are already sorted. Sweep it clean, place the pedestals and wind them to height. The slab takes the load and nothing moves.\n\nOn soil or lawn, do some groundwork first. Scrape back the turf, compact the surface, and set a flat paver under each pedestal. A 300mm square concrete paver is cheap and does a remarkable amount of work spreading load. On soft or reactive clay, go bigger or compact a bed of road base first. Skipping this step is the single most common reason low decks end up uneven after a year.\n\nAlso think about water. Make sure the ground under the deck drains away from the house, not towards it. One of the quiet benefits of a pedestal system is the gap it creates, which lets water run and air move under the boards. That airflow keeps the underside of your joists drier, and dry timber lasts.\n\nSetting them level\n\nGet your frame built and squared first, then bring the pedestals in. Find the highest point of the ground under the deck footprint, because that point sets your minimum height. Place the first pedestal there and wind it to roughly the lower end of its range.\n\nRun a string line or lay a long straight edge with a spirit level across the frame from that first point. Work outward, placing a pedestal at each bearing point and winding until the joist just touches the line. Do not force it. The joist should rest on the pedestal, not be lifted off its neighbours.\n\nOnce every support is in, walk the deck and feel for any softness. A point that does not carry weight needs a quarter turn up. Then fix the top plates to the joists with outdoor-rated screws, stainless or hot-dip galvanised if you are anywhere near the coast. Screws are not supplied, so pick them up with the timber.\n\nRecheck everything after the first heavy rain. Ground settles. That is normal, and fixing it takes two minutes with these supports instead of an afternoon with a crowbar.\n\nLooking after them\n\nThere is not much to do. Twice a year, clear leaves and soil from around the bases so water keeps draining freely. If mud builds up, a rinse with plain water is enough. Avoid solvents and harsh chemical cleaners on the plastic.\n\nAfter the first wet season, drop down and check your levels. If one corner has moved, adjust it. After that, most people only look again if they notice a bounce or a new squeak. The supports themselves need no painting, oiling or sealing.\n\nThe short version\n\nIf you are building something low, something flat, and something that has to sit on ground that is anything but flat, adjustable deck pedestals are the sensible answer. This twelve pack covers heights from 60mm to 135mm, fixes to timber or composite joists with a few screws, and lets you re-level later when the ground does what ground does.\n\nPut a paver under each one, set them with a string line, and check them after the first big rain. Do that and you will have a deck that stays true for years, with none of the concrete, post holes or curing time the old method demanded.",
      "llm_summary": "Adjustable Deck Pedestals 12 Pack (60-135mm) is a set of twelve height-adjustable deck support blocks, model GHB-89H6. Each pedestal adjusts between 60mm and 135mm to level joists over uneven ground, and can be re-adjusted after installation if the ground settles. The supports are moulded from high-strength PP for outdoor use and are finished in black. The top plate has screw holes for fixing directly to timber, WPC or composite joists. Package dimensions are 25 x 25 x 22.2 cm with a shipping weight of 3.4 kg. Country of origin is China. Load rating, colour options beyond black, and warranty terms are not specified in this record. Uses include floating decks, patios, walkways, shed floors and pipework support.",
      "returnable": true,
      "return_policy": "Voluntary 14-day change-of-mind returns in original condition, buyer pays return postage; Consumer Protection Act 68 of 2008 consumer guarantees for faulty goods. Return postage on faulty goods is ours.",
      "shipping_profile": "standard",
      "warranty": null,
      "brand": "Decking Pedestal Company",
      "gtin": null,
      "mpn": null,
      "condition": "new",
      "url": "https://deckingpedestal.co.za/adjustable-deck-pedestal-12-pack-60-135mm/",
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      "updated_at": "2026-10-14"
    },
    {
      "id": "adjustable-deck-pedestal-24-pack-30-60mm",
      "sku": "adjustable-deck-pedestal-24-pack-30-60mm",
      "title": "Adjustable Deck Pedestals 24 Pack (30-60mm)",
      "slug": "adjustable-deck-pedestal-24-pack-30-60mm",
      "price": 1956.99,
      "currency": "ZAR",
      "availability": "in_stock",
      "category": "deck-pedestals",
      "category_label": "Deck Pedestals",
      "tags": [],
      "colors": [],
      "materials": [],
      "dimensions": null,
      "weight": "2.6 kg",
      "images": [
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        "https://deckingpedestal.co.za/dropship-images/deck-pedestals/adjustable-deck-pedestal-24-pack-30-60mm/adjustable-deck-pedestal-24-pack-30-60mm-2.jpg",
        "https://deckingpedestal.co.za/dropship-images/deck-pedestals/adjustable-deck-pedestal-24-pack-30-60mm/adjustable-deck-pedestal-24-pack-30-60mm-3.jpg",
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      ],
      "description_short": "A 24 pack of height-adjustable deck support blocks in high-strength PP, tuning from 30mm to 60mm, screw-fixing straight to your joists and lifting timber or WPC clear of wet ground.",
      "description": "The problem with building on real ground\n\nNothing outside is flat. A concrete slab is poured with a fall so water runs off. Pavers settle unevenly once the soil under them dries out and swells again. Compacted base shifts after a wet season. None of this matters until you try to lay a deck frame on it, and then it matters a lot.\n\nLay joists straight onto the surface and you get three headaches. The deck rocks where the ground dips. The timber sits in whatever water pools there, which is where rot and insect damage usually start. And a stubborn gap appears along one edge that you cannot hide with trim.\n\nBuilders have dealt with this forever by packing out the low spots with offcuts, shims or scraps of paver. It works for an afternoon. Then the timber packer swells, the paver scrap cracks, and the deck is uneven again.\n\nAdjustable deck pedestals fix the issue at the source. Every support point gets its own height setting, so the ground can be as wonky as it likes and the top of the frame still finishes dead flat.\n\nHow these supports work\n\nEach pedestal is a moulded plastic base with a threaded body. Twist it and the overall height changes. This pack adjusts anywhere between 30mm and 60mm, which is roughly 1.18 to 2.36 inches.\n\nThat is a low range on purpose. These are not for building a raised deck on posts. They are for the far more common job of lifting a frame slightly clear of a slab, a paved courtyard, a shed pad or a balcony surface. You get drainage and an air gap without losing head height or creating an awkward step up from a doorway.\n\nThe top plate is pre-drilled. You position the pedestal under the joist, set it to height, then drive screws up through those holes into the timber. From that moment the support and the frame behave as one structure, which is what stops the sway and tilt you get with loose packers.\n\nThe bodies are high-strength PP, better known as polypropylene. The maker specifies good corrosion and oxidation resistance and says the material does not easily deform, age or crack after long exposure to sun, rain and frost. In plain terms, it will not rust and stain the slab, it will not rot, and termites have no interest in it. The base is rounded underneath, which spreads the load across the surface rather than concentrating it at one point.\n\nOne thing worth saying plainly: the maker does not publish a load rating in kilograms for these. We will not invent one. The copy describes strong load bearing and a stable base, and that is as far as the facts go. For normal foot traffic on a low platform that is usually fine. For a spa, a stone bench, a full outdoor kitchen or anything unusual, talk to a builder or engineer and space your supports closer.\n\nWho these suit\n\nThis pack is a good fit if you are doing any of the following.\n\nLaying a floating deck over an existing concrete slab that has a fall on it. This is probably the single most common use. The 30mm of adjustment usually covers the drainage fall across a small to medium area.\n\nBuilding a shed or greenhouse floor that you want off damp ground. Grid the supports under the bearers and you get a dry, level floor with no concrete work.\n\nPutting a timber or WPC platform over pavers in a courtyard or on a balcony, where you need a clean flat surface but cannot or do not want to lift the existing material.\n\nRunning a walkway or a small multi-level landing across ground that is close to flat but not quite there.\n\nThey are less suitable if you need real height, if you are building over soft uncompacted soil with no pad under each point, or if the structure is subject to building approval with a specified footing system. In those cases use the right tool for the job.\n\nWorking out how many you need\n\nStart with your joist layout. Supports usually go under every joist at regular intervals, plus at every joist end and every join. Spacing between 400mm and 600mm along the joist is a common starting point for light residential use, closer if your boards are thin, your timber is springy, or you expect heavy loads.\n\nSketch the frame on paper and mark every support point. Count them. Then add a few spare. Running three pedestals short on a Sunday afternoon is a genuinely annoying way to end a project.\n\nTwenty-four supports covers a compact platform at tight spacing, or a slightly larger one at wider spacing. If your project is bigger than a few square metres, order two packs from the start.\n\nGetting them in straight\n\nSet up string lines first. Pick your finished height, run lines across the area at that level, and work to them. Trying to level pedestal by pedestal with a short spirit level is slow and tends to drift.\n\nSet the corner supports first and check them against each other with a long level or a laser. Then work along each line, bringing each pedestal up until it just touches the underside of the joist. Just touching is the goal. Over-tightening one support lifts the joist and takes the weight off its neighbours, which is exactly what causes rocking later.\n\nScrew through the top plate holes into the joist with outdoor-rated screws. Choose a length that bites well into the timber without punching through the walking surface.\n\nWalk the deck before you fix the boards. Any rocking is easier to chase out now than afterwards.\n\nCare, and the season-two check\n\nThere is not much maintenance to speak of. The material needs no paint, oil or sealer. What it does need is for water and air to keep moving.\n\nSweep or hose grit, soil and leaf litter away from the base areas every so often. Build-up blocks drainage and slowly turns an air gap into a damp bed, which defeats the whole point of lifting the frame.\n\nThen there is the season-two check, which is the part most people skip. Ground settles. Slabs move a little. After the first wet season, go around the perimeter with a level and see if anything has shifted. Because the height stays adjustable after installation, a quick twist brings the deck back to level without pulling boards up. That ability to re-level later is one of the real advantages over a fixed pier.\n\nKeep an eye on the screws too. Timber shrinks and swells with the weather, and a fixing that was tight in autumn can loosen by the following summer.\n\nThe short version\n\nIf you are building low and the ground is uneven, adjustable deck pedestals save you time, shims and swearing. This pack gives you 24 supports with a 30mm to 60mm range, moulded in weather-resistant polypropylene, screwing straight to your joists.\n\nThey suit floating decks over slabs, shed and greenhouse floors, courtyard and balcony platforms, and short walkways. They do not suit raised decks, soft unprepared soil, or heavy unusual loads without advice.\n\nMeasure your grid, count your points, order a few spare, and set up string lines before you start. Do that and you will have a flat, free-draining platform that stays flat.",
      "llm_summary": "This is a 24 pack of adjustable deck pedestals, supplied in black. Each support adjusts in height from 30mm to 60mm and is moulded from high-strength PP, described by the maker as resistant to corrosion, oxidation, deformation, ageing and cracking in sun, rain and frost. The top plate carries small holes so the pedestal screws directly to a joist, and the height can be re-adjusted after installation if the ground settles. The rounded base helps spread load. Typical uses include low floating decks, patios, multi-level decks, walkways, shed and greenhouse floors, WPC and treated timber joists, stone and engineered mesh flooring. Package measures 25 x 25 x 22.2 cm and weighs 2.6 kg. No load rating in kilograms is specified in this record.",
      "returnable": true,
      "return_policy": "Voluntary 14-day change-of-mind returns in original condition, buyer pays return postage; Consumer Protection Act 68 of 2008 consumer guarantees for faulty goods. Return postage on faulty goods is ours.",
      "shipping_profile": "standard",
      "warranty": null,
      "brand": "Decking Pedestal Company",
      "gtin": null,
      "mpn": null,
      "condition": "new",
      "url": "https://deckingpedestal.co.za/adjustable-deck-pedestal-24-pack-30-60mm/",
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      "updated_at": "2026-10-14"
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}