The Short Answer on Hauling Beach Sand Home
Sand you scoop off a public beach is usually a poor choice for both a kid's sandbox and a backyard volleyball court. In a lot of coastal towns and state parks, removing sand is also against local rules, so the first call to make is not a horticultural one. Check with the park or municipality before you fill a single bucket.
It helps to split the question in two, because most people asking it are really asking two different things at once. Beach sand is not inherently toxic. It is rock, shell, and mineral, and nobody sprayed it with anything. The problem is that it is unprocessed, ungraded, and uncertified. Those are separate issues from toxicity, and they are the ones that actually bite you.
For a sandbox, the concern is what is mixed into the sand. Shell shards, pebbles, salt, silt, whatever washed in on the last tide. For a court, the concern is how the sand behaves underfoot after a month of rain and diving. Ungraded sand with fines in it compacts, holds water, and stops draining.
The rest of this covers what is really in untreated beach sand, what the silica conversation is actually about, which labeled product to buy instead, and then the volume math for both a sandbox and a court so you can order once and be done.
What Is Actually in Untreated Beach Sand
Shell fragments and gravel
Walk any beach and you are walking on broken shell. Some of it is worn smooth. Plenty of it is not. Mixed in are small stones, bits of coral or rock depending on the coast, and the occasional piece of glass or metal that nobody sifted out.
That matters more than it sounds. Kids kneel in a sandbox, dig with bare hands, and sit down in it. A volleyball player dives shoulder first and skids. Both of those situations reward rounded, uniform grains and punish sharp grit. A single shell edge you never noticed is the difference between a fun afternoon and a scraped knee that needed cleaning out.
Salt, silt, and organic matter
Ocean sand holds salt, and salt does two annoying things. It dries out skin on contact over a long play session, and it pulls moisture out of the air, so the sand stays clammy at the bottom of the box longer than it should. Rain alone does not reliably flush it. Commercial sand gets salt removed by washing, which is a deliberate processing step, not something the weather does for you.
Unwashed sand also carries silt, clay, and bits of decaying organic material. Those fines are what turn a sandbox muddy and sour after a few rains, and they are what makes a court surface pack into a crust instead of staying loose. Fines fill the gaps between grains, block drainage, and hold water. Everything you dislike about a sandbox that has gone bad traces back to fines.
No source control
Beach sand has no play-safety certification and no consistent grading. You do not know the grain size distribution, you do not know how clean it is, and you do not know what came in with the tide last week. Storm drains, boat traffic, and wildlife all end up in the same material you are scooping.
The practical version of this point is simple. A handful that looks clean and dry on an open beach behaves completely differently once it is confined in a wooden box, wetted repeatedly, and never allowed to fully dry between rains. The beach drains constantly and gets flushed twice a day. Your sandbox does neither.
The Silica Question, Explained Without the Panic
Why crystalline silica comes up at all
A lot of commercial play sand is quartz based, produced by crushing quartz rock. Crushing is what creates fine dust, and crystalline silica dust is the part of the conversation people are worried about. The hazard is inhaling fine airborne dust over time. It is not about touching sand or getting it on your hands.
Children breathe more air relative to their body size than adults do, and they play low to the ground where dust hangs. That is a reasonable thing for a parent to pay attention to, and it is why the topic refuses to go away in parenting forums.
What the regulatory picture actually looks like
Most of the internet discussion traces back to a 1986 scare over tremolite found in commercial play sand. The Consumer Product Safety Commission denied a petition to prohibit marketing sand containing tremolite, and there are still no federal standards or labeling requirements covering sand source or content. That is the whole reason this is confusing. There is no seal to look for.
Because labeling is not standardized, the checking falls to the buyer. The American Academy of Pediatrics has advised choosing natural river sand or beach sand over crushed quartz product, and that advice is exactly why the beach question keeps circling back. Read that in context, though. The point is rounded, water worn sand rather than crushed rock. It is not an endorsement of walking onto a public beach with a shovel. You can buy washed river sand from a supplier and get the grain shape without the shells, salt, and legal problem.
How to judge a bag before you buy it
Two checks get you most of the way there.
- Read the safety data sheet. Reputable suppliers publish one. It will tell you the quartz content of the product. If a seller cannot produce an SDS for a sand they are selling as play sand, that tells you something on its own.
- Do a pour test. Open the bag, take a dry handful, and pour it out from waist height. If it throws a visible cloud, that is a dusty product and it is the wrong thing for a sandbox. Low dust sand pours and lands.
Non quartz options exist. River sand and feldspathic sand are both rounded by water rather than crushed, which means fewer sharp edges and less dust to begin with. Ask your supplier what they carry.
One hard no. Never put mortar or masonry sand in a kids sandbox. It is fine, angular, and dusty, and it is the worst inhalation choice sitting on that shelf. It is also the one people grab most often, because it is cheap and every building supplier has it.
Washed vs Unwashed, and Why Grading Matters More Than Brand
What washing removes
Washed means the fines have been rinsed out. Silt, clay, dust, and salts go down the drain and what is left is clean grain. That single processing step fixes most of what is wrong with raw beach or pit sand. It is the difference between sand that drains after a storm and sand that turns into a shallow puddle with a crust on top.
Rounded vs angular grains
Grain shape comes from history. Sand tumbled by moving water for a long time has rounded grains. Sand made by crushing rock has angular grains with fresh broken edges.
Rounded grains roll past each other. They feel soft to kneel on, they release underfoot when a player plants and cuts, and water moves through them. Angular grains interlock, which is exactly what you want in a concrete mix and exactly what you do not want under bare skin. They pack hard, they resist drainage, and they abrade.
Masonry sand vs play sand vs concrete sand
These three get confused constantly at the supply yard, so here is the plain version.
- Masonry sand is fine and angular and engineered to bind in mortar. In a sandbox it packs into a crust and it is dusty. Not a play material.
- Concrete sand is coarse and carries larger particles and more grit. It is good under pavers and in base work. It is wrong under bare feet.
- Washed play sand is the labeled product for a sandbox, and for a court you want a washed, uniform, rounded sand with the fines removed. Suppliers often list that as volleyball sand or beach volleyball sand.
Key takeaway: you are buying a specification, not a brand name. Washed, rounded, screened, low fines. Once you know those four words, you can order washed play sand and volleyball court sand in bulk and ask intelligent questions about what is actually in the pile.
Depth, and Why Courts Need So Much More Than You Think
Sandbox depth
A sandbox works well at roughly 4 to 6 inches of sand. That is enough to dig, mound, and bury a toy truck. Going deeper mostly means more sand to keep clean and more sand staying damp at the bottom. It does not buy better play.
Volleyball court depth
A court is a completely different animal, and this is where most backyard builds go wrong. Sand depth on a court is a safety feature, because players land in it at speed. Shallow sand means a diving player hits compacted subgrade through the layer, and knees and elbows find that out first.
Backyard courts commonly run about 12 inches of sand. If people are going to actually dive and play hard, 18 to 24 inches is the range to aim for. That is a large jump in volume, which is why depth, not court length, is what really drives your order.
What is underneath matters as much as the depth. Sand sitting directly on clay holds water and turns the court into a bathtub after every storm. The usual approach is a drainage layer of gravel under the sand with a barrier fabric between the two, so the sand does not migrate down into the stone and disappear over a couple of seasons.
Plan on losing some volume the first year regardless. Sand settles, kicks out past the edges, blows around, and rides out on shoes and swimsuits.
How Much Sand to Order: The Cubic Yard Math
The formula
Length in feet times width in feet times depth in feet, divided by 27, gives cubic yards. To convert inches of depth into feet, divide by 12. Six inches is 0.5 feet. Twelve inches is 1 foot. Eighteen inches is 1.5 feet.
Sandbox example
Take a 6 by 6 foot box filled to 6 inches. That is 6 times 6, which is 36 square feet, times 0.5 feet of depth, which gives 18 cubic feet. Divide 18 by 27 and you get about 0.67 cubic yards. Two thirds of a yard. That is a small enough number that bagged sand is a reasonable option for a sandbox, though it is still a lot of bags.
Backyard court example
A 30 by 60 foot playing area at 12 inches deep is 30 times 60 times 1, which is 1,800 cubic feet. Divide by 27 and that is about 66.7 cubic yards. Take the same footprint to 18 inches and it becomes 2,700 cubic feet, or about 100 cubic yards. Same court, half again as much sand.
One thing people forget. Most courts are built with a free zone of sand around the playing lines so a player chasing a ball does not run out onto turf. Measure the full sand footprint you are actually filling, not just the dimensions between the lines. That overhang can add a meaningful number of yards.
A note on units. Suppliers frequently sell sand by the ton rather than by the yard. Sand weight varies with moisture content and grain size, so do not assume a conversion number you found somewhere. Ask your supplier what their material weighs and let them convert your cubic yards into tons.
Add a small overage on top of whatever number you land on, for settling and spread loss. Running short halfway through a court build is far worse than having a little left over. If you want to sanity check your figures before you call, run them through a sand calculator and compare. Bagged sand also gets expensive fast at court volumes, and bulk delivery is noticeably cheaper once you are past a few cubic yards.
Keeping Either One Usable After It Is Built
Cover a sandbox whenever it is not in use. An uncovered box collects rain, falling leaves, and animal waste, and that last one is the single biggest real world sandbox health issue. It is a much more practical concern than anything in the silica discussion. A fitted lid or a weighted tarp is enough.
Rake and turn the sand periodically so it dries through rather than staying wet at the bottom. Damp sand at depth is where things go sour, and turning it exposes anything that should not be in there.
Watch your frame material. Avoid anything treated with creosote, including salvaged railroad ties, which still show up in backyard builds because they are free. Untreated lumber, plastic, or composite is the way to go.
Expect to top off both a sandbox and a court every year or two. Sand leaves with kids, wind, and shoes, and nothing stops that.
For courts, drag or rake the surface before play to loosen the top few inches. Sand compacts between sessions, especially after rain, and packed sand under a planting foot is how ankles get hurt.
How We Started
We started Mulch Mound because we got tired of the hassle that came with buying landscaping materials. The options were either loading bags into your car at a garden center or calling around to local suppliers, trying to figure out pricing, minimums, and delivery schedules. Neither option felt convenient or transparent.
Three of us – Alec, Mo, and Tyler – decided there had to be a better way. Alec and Tyler got their start back in 2013 running a landscaping business during college, moving mulch and mowing lawns to pay tuition. That experience taught them how frustrating it was to source materials, and years later, that frustration turned into Mulch Mound.
We focus on making it simple to get mulch, stone, and soil delivered directly to your home. Order online, pick your delivery date, and we handle the rest. No loading bags. No calling multiple suppliers. No wondering if you bought enough or paid a fair price.
We work with quality local suppliers in the areas we serve and aim to be straightforward about what we offer and what it costs. Landscaping is hard work. Buying the materials for it shouldn't be.
Frequently asked questions
Can I just take sand from the beach and put it in my kid's sandbox?
Often you legally cannot. Many public beaches, state parks, and coastal preserves prohibit removing sand, because beach sand volume is actively managed against erosion. Check the posted rules or call the managing agency before you load anything.
Even where it is allowed, the volume works against you. A 6 by 6 foot box at 6 inches takes about two thirds of a cubic yard, which is roughly 18 cubic feet. A five gallon bucket holds well under a cubic foot of sand. You are looking at dozens of full buckets, hauled across sand, lifted into a car, and driven home wet and heavy. Most people quit around trip four and go buy sand.
Does play sand contain crystalline silica, and is the dust actually dangerous for children?
Many quartz based play sands do contain crystalline silica. The exposure route that matters is inhaling fine airborne dust, and the serious disease associated with it comes from years of heavy occupational dust exposure, not from an afternoon in a sandbox. Dose and duration are the whole story.
That said, there is no reason to accept a dusty bag when lower dust options sit on the same shelf. If you already own dusty sand, lightly dampening it before play knocks the airborne fraction down substantially, and a covered box keeps it from drying to powder in the sun.
What is the difference between washed play sand and masonry sand?
Price and availability, which is exactly why the mistake happens. Masonry sand is cheaper per yard and every building supplier in town has a pile of it, so it is the easy grab when someone is filling a box on a Saturday. Play sand costs more because it has been washed and screened to a consistent grain size.
The money you save on masonry sand buys you a fine, angular, dusty material designed to lock together in mortar. It crusts over in a sandbox, it does not drain, and it is the dustiest thing you could pick. If budget is the constraint, buy less play sand and run a shallower box rather than switching to masonry sand.
How many cubic yards of sand do I need for a regulation size court?
Start by measuring the full sand area including the free zone around the lines, not just the playing rectangle. That perimeter is part of what you are filling and it is where people under order.
Then understand that depth is the variable driving your total, not court length. Doubling your planned depth doubles your order. A common approach is to decide honestly how the court will be used. Casual family play with limited diving can live at the lower end of the depth range. If anyone is going to hit the sand hard and often, order for the deeper build up front, because adding 6 inches later across a full court is an entire second delivery.
Why is beach sand not recommended for building a volleyball court?
Set the safety argument aside and it still fails on performance. Court sand is chosen for how it drains after rain and how it releases under your foot when you plant and cut. Rounded, uniform, low fines sand does both. It sheds water quickly and gives way a little rather than gripping.
Ungraded beach sand brings a wide mix of grain sizes plus silt and shell. The fines settle into the gaps between the larger grains, which blocks drainage and lets the surface compact. You end up with a court that stays wet a day longer than it should and plays hard on top, which is the opposite of what you built it for.