They would walk by to see our progress and offer advice. In general, a deck footing is usually used if it is going to be higher than your waist or larger than 100 square feet. The whole thing got a PVC flat-roof detail before the mortar went down. For one, some of the soil will seep and wash out from the bottom of the bed. Visit our Shop menu for more details. The concrete is a solid raised foundation upon which to build a beautiful redwood deck. Building a deck on sloped groundlearning center building a deck on sloped groundlearning center deck and cover view along the way building a raised deck over concrete patio you raised concrete decking patio how to build a deck over rbotsinfo building a floating deck over concrete slab backyard patio. It sounds like you’re growing a fantastic array of veggies too. 8) Concrete Form Removal. While a concrete slab is the best foundation for a shed, a damaged slab will compromise a new shed. If and when you ever decide to move the garden bed, it may have some discoloration below. if the slab is 8" thick it may even hold some of the weight of the deck though you want to add footings and not rely to much on the slab. This step by step guide should have provided you with a blueprint for doing so. Which method of hardware cloth attachment is best (inside or on very bottom)? It will also slowly reduce the amount of soil in the bed entirely. I’m all about simple living, real food, and everything plants. This is what will keep the soil inside your bed, but also allow for excellent drainage! Ripping up concrete and building a deck seemed like a daunting and expensive task, so when we saw NewTechWood Deck-A-Floor, we thought it would be absolutely perfect for our space. However, keep in mind that some water will still leak from the seams in the boards. Clearly, there are many different ways you can garden on top of hard surfaces. Why? Or perhaps I should say… how we like to do it! We look forward to becoming your total solution to all of your decking needs! Do not use “potting soil” only. My husband Harrison and I have wanted to change out our patio floor since the day we bought the house. Hello Cameron, we prefer to attach the hardware cloth to the side of the raised beds when we are going to place the bed on concrete or other hard surface. Hey! Disclosure: This post may contain affiliate links to products for your convenience, such as to items on Amazon. Their strong market presence and unparalleled support have made NexGEN Australia’s most trusted provider of capped composite decking materials. Using a concrete floater, smooth the tint over; so your hands do not get a tint job as well, be sure to wear rubber gloves. Get Price advice needed - building a raised deck on concrete … I’ll divide this post into (at least) two sections (maybe a third for decorating and aesthetics): Building the patio cover, and building the deck. The water filters perfectly, the security cloth seems to support everything very well, and I’m very happy!! Thank you for being a significant influence and inspiration in the transformation that took place at our “homestead” this year. It would have to be raised about 36” to be compliant with code. Faster and More Flexibly with Raised Floors. The space is built on a raised floor about 8" above the garage slab with a 6 mil vapor barrier over the slab and inside of the stem wall. Hi, I am about to install a wooden deck over my 2 (ugly but solid) concrete slab patios. Over time, this may affect the soil in your raised beds. The article is much informative regarding work as well. In contrast, chicken wire sags, rusts, and breaks down over time. If you need any pointers here, please check out our detailed “How to Design & Build a Raised Garden Bed” tutorial. in a Dehydrator or Oven. I am using 100mm x 100mm posts at about 1m spacing to support 150mm x 50mm joists at 300mm spacing. If you remove the existing patio or concrete slab, you will have an added 5" to build your deck! In addition to enhancing your property’s versatility and living space, floating decks are captivating in their appearance. Test periodically with pH meter and adjust as required. The concrete gets cracked, stained and pitted and the owners want to […] In a nutshell, we use a combination of high-quality bagged soils, bagged compost, and homemade compost. Any suggestions? 2. (I did this and always found it hard because the long screws would interfere with each other) #turmeric #growyourownmedicine #, Sourdough pancakes: more delicious and nutrit, You want the honest truth? Mark the location of the sleeper on the concrete patio. I have no problems of any kind with it. Long staples may work too, but could also pop loose more easily. Building a Wooden Deck Over a Concrete One: So we've had this very sturdy but extremely plain looking concrete porch in the back of the house, and we've always wanted to make it warmer and more inviting. For this step, I highly suggest using hardware cloth over something like chicken wire. Compost and worm castings will help greatly with moisture retention. With a combination of tailored watering practices (not too much! I have enough info and help for this job, except can someone please advise the best way to support / lift the decking frame above the concrete slabs to prevent the frame from rotting due to water entrapment. Choose a sunny, level location for the raised bed. If you are building an overhead to cover an existing patio, you must first determine if local codes allow setting it directly on the slab and, if so, is the concrete thick enough to support the weight. Raised beds built on dark pavement will usually have higher moisture needs than those built on a lawn or natural substrate. We filled the new driveway bed with the same soil and compost mixture we fill all of our raised beds with. I have heard it may slightly increase the pH of your soil over time when in direct contact with concrete. There you have it! You could use the same design and idea as our solid-bottom rolling boxes, but prop the bed up on bricks instead. Well, excess runoff from your raised bed will run to wherever rain water usually collects on your hard surface. There is nothing wrong with growing things in pots. Because there shouldn’t be much weight pulling down on the fabric, we simply used a staple gun to secure the cloth in place around the inner lower perimeter of the bed. When we broke ground for the garden beds, neighbours were curious. This part is relatively easy. Wear good poke-proof gloves! I am about to pull all that is tired, dry, and non-productive, and put our beds to rest for the fall. ), your garden bed should be able to retain most of the water you provide it. Any purchases made through affiliate links are greatly appreciated, as they enable me to continue to create and share with you! Some have drainage holes that you could add drip pans underneath, effectively protecting the surface below. Only 3' of the deck will hang over this slab. Hope that helps and good luck! Do NOT underestimate the extreme weight of lumber and soil, especially once it is wet! Two I suggest are this one or this option. The number of seasons in which the plant produces will also be fewer compared to those planted in ground. Secure each length to the slab with concrete nails spaced approximately 32 inches apart and 8 to 12 inches from each end. Consequently, the best way we have found to contain the soil within a raised garden bed on top of concrete is to create a sturdy “basket” for the soil within the wood frame of the bed. August 2019. Keep this in mind when considering watering frequency. In contrast, putting a raised garden bed on concrete is essentially like creating a large pot or container. We also use half wine barrels as planting containers, with drainage holes added to the bottom. Oh chickens... always keeping us on our toes! Building a Wooden Deck Over a Concrete One Step 1: Materials, Tools, Etc. To learn more about ongoing soil care for your raised bed, check out this article about how we amend and fertilize our raised beds before planting (or between seasons) using a no-till method. One specific application that’s asked about often are installations over concrete pads. Xo, Joanne. They are ideal for apartment complexes that feature outdoor living space. I have a 19 by 34 foot raised patio (about 2 foot tall back filled with a concrete slab on top) at the back of my house. The slate is flaking real bad and some of the stones are breaking up. You know, physics. We invite you to contact us to learn more about floating deck options and experience the NexGEN difference. The added 5" makes building a wood deck possible - if you do it right along with a little bit of additional work. The corners get a bit awkward. For example, if you have a drain system, a slight slope to direct water flow off the edges, or a depressed area where water usually collects – that is where the excess raised bed water will go too. Some of the links on this site are affiliate links, such as Amazon links. You’ll also avoid having to install a ledger, … Soggy soil and drowning roots lead to unhappy, unhealthy plants. Happy Sunday! On the other hand, the steps we used to modify our newest driveway garden bed will work well on top of concrete, asphalt, pavers, or similar surfaces. Trace along the top of the ripped joist and cut the joist extension along this line. And I don’t just mean “cheap” as inexpensive; I mean poorly made. Enjoy your new growing space! If you need more in depth information, please don’t hesitate to call us on 03 9305 2000, where we will be more than happy to assist. Sep 21, 2018 - how to build a raised deck over concrete build wood deck over concrete patio decking over deck over concrete slab how to build a porch a roof over deck diy raised concrete deck In fact, many plants prefer 18 to 24 inches or deeper, including tomatoes, carrots, peppers, eggplant, and even kale. You won’t have to cut away your house’s siding, install flashing, and do annual checkups on the health and safety of your ledger. Required fields are marked *. It's a fairly simple project and the cost is reasonable ($3 to $6 per sq. Test periodically with pH meter and adjust as required. Then, add crushed stone and pour the concrete on top. Learn composting basics (and 6 different ways to compost at home) in this article. Keep in mind that installing a raised garden bed on top of a deck may cause staining or water damage, unless drainage is controlled. Next, we are going to line the inside bottom of the raised bed frame with hardware cloth wire fencing material. Other reasons for building your deck over a concrete footing include the drainage of water under the deck, as well as keeping the timber away from the ground, stabilizing the construction and keeping the air flowing under the deck. But if you do need to do any digging, use caution to not accidentally rip open your fabric bottom. For example, to pour a slab on a slope, you have to cut into the hillside, erect retaining walls, and use fill to level the site. I loved reading this article. Additionally, the majority of homeowners indicate that installing a deck gives them a sense of enjoyment and accomplishment. Truthfully, we prefer the mobility and added benefits (such as “air pruning”) of grow bags over raised beds for many of our crops, including to grow potatoes. Contact us to kick things off. Read more…. Try to hit all the low areas you know collect puddles in the rain. The sides of the raised garden beds do connect to the end panels that 4×4 lumber in the corners, we have actually never noticed the screws interfering with each other though you would imagine it would happen. ... How to Build a Deck Over a Concrete Patio. We’ll discuss important concerns such as drainage, soil retention, and soil quality. I hope your neighbors will follow suit. Just do your best to meld and bend the wire to be as flush as possible with the wood. Keep this in mind when considering watering frequency. It is also the material we use for predator-proofing our chicken coop and run. Homestead and Chill gains a small commission from purchases made through those links, at no additional cost to you. The good news is TimberTech® composite decking can be installed over concrete. My hope is to inspire the love for a similar lifestyle or hobbies in others ~ by sharing real-life tips and tools to make “modern homesteading” activities easy, understandable, and enjoyable ~ so you can learn and dive in with me! If you remove the existing patio or concrete slab, you will have an added 5" to build your deck! Raised concrete deck over feat how to build a wood patio modern outdoor building floating slab pátio de cimento ideias quintais construir um restoration remodelling in elgin il diy view topic can u existing home backyard wooden one terrasseideer terrasse ideer og udendørs renovation forum turning into covered catz the kitchen and cover along way elevated design elevate… Read More » Worms bins are easy to maintain, divert waste from the landfill, and create “black gold” for your garden! Best of luck! Try to keep an even amount of slack on all sides. About a year ago I built a small apartment inside part of a detached garage. When it comes to filling a garden bed on concrete, invest in high-quality soil and compost to help compensate for the shallower root space. Can it handle the moisture and weight of a heavy raised garden bed? (You’ll see what I mean in our driveway bed example and “containing the soil” section below.). I said to my husband, “I may not grow any vegetables, but I will certainly grow community!” In the end, I grew both. Any purchases made through affiliate links are, this 2-foot wide 1/2” opening hardware cloth, How to Design & Build a Raised Garden Bed, How to Fill a Raised Garden Bed: Build the Perfect Organic Soi, Composting 101: What, Why & How to Compost at Home, How to Amend & Fertilize a Garden Bed Before Planting (or Between Seasons), Companion Planting 101, with Companion Planting Chart, Seed Starting 101: How to Sow Seeds Indoors, 12 Places to Buy Organic, Heirloom & Non-GMO Garden Seeds, How to Make Your Own Sourdough Starter From Scratch, How to Make Homemade Cannabis Oil (or CBD Oil), How to Make Simple Apple Cinnamon Chips (or Rings!) NexGEN maintenance free composite and aluminium decking with up to a 50 year stain and fade warranty. Note that the following steps will work best as-described below with a wood bed frame that is about 2 or 3 feet wide. Gravel, sand, dirt, and concrete pavers are NOT suitable materials upon which to install the sleepers and decking because the sleepers are not sturdy enough to span gaps, as with a normal raised deck. building over an existing slab. – Do both side and end wood panels get screwed into corner posts? I tried to explain to my uncle that he didn’t have enough elevation at the door to build a deck over his patio. Building a floating deck over concrete is one of the best ways to expand your living space while enhancing your property’s aesthetic appeal. In the event you want the concrete tinted, apply the concrete powder dye after the concrete has slightly dried. Seems like waterproofing would be necessary. We chose this style because we wanted to elevate the small beds on heavy-duty furniture dollies with wheels, making them mobile. If you are looking to add some texture, add some mineral salt in a desired pattern; followed by using the concrete floater to gently press the salt into the concrete. Bend up each side to follow the shape of the bed, and then press it down into the bed. I may make a small commission from purchases made through some of those links, at no extra cost to you. Install it flat on the slab surface, with the outside edge aligned against the side wall or the edge of the floor line. It isn’t the best idea to add soil straight into a garden bed directly on top of concrete. It should allow for adequate drainage, but also have good moisture retention properties. We have other parts of the yard that need attention before the colder, wetter weather sets in. If you are building an overhead to cover an existing patio, you must first determine if local codes allow setting it directly on the slab and, if so, is the concrete thick enough to support the weight. Building Over an Existing Slab. We don’t worry too much about which side of the fabric faces upwards or downwards, I don’t think it really matters. If this style and example doesn’t work in your situation for whatever reason, there are still a TON of other options to garden on a patio, deck, balcony, driveway, or other hardscapes! Install the 2x4s flat. We’ll also talk more about solid-bottom raised beds in the Alternative Options section near the end of this article. I am now up to laying the weedmat down and have some questions…. Ease of installation is one of the top benefits of a Deck Cell floating deck. Keep in touch with our weekly newsletter and receive a FREE digital, printable garden planning toolkit! Now, go around the perimeter of the hardware cloth and secure it to the lower inside walls of the bed every 6 inches or so. If our example doesn’t suit your situation, read the “alternative options” for more ideas to add growing space to your patio, deck, or other hardscape area. I have built 7 x planter boxes over our winter just gone (in Aust.) Decking laid over concrete must be raised from the surface of the concrete with 2x4 pressure-treated sleepers. This may not look like the most exci, Sneak peek by don vandervort, . Before you go slapping together a raised bed and plopping it down on your patio, take a moment to think about your space. Instead, we create a wire and fabric “basket” or bottom on our raised bed to both contain the soil but also promote drainage. We had a roll of 4-foot wide landscape fabric, so we folded it in half to create a dual layer in the just-under 2 foot wide bed. The material should be pretty obvious - wood. For example, using short 4×4” posts supported with metal braces. Building raised deck on solid concrete slab doityourself elevated concrete porch stone masonry diy chatroom composite decking over a concrete porch gives backyard new life composite decking over a concrete porch gives backyard new life installing pavers over front porch concrete part 1 landscapers in how to build a raised deck over concrete wood. Therefore, you may even find the need to water a garden bed on concrete more often than others, like most container gardening. Settling of upper concrete slab (imagine a PB&J sandwich, where the slabs are the bread and the crushed stone is about an inch and a half of jelly; because the siding and sheathing can’t retain that stone under that pressure, it will settle at the house, squishing the jelly toward the house, the slab settling on top of it). The concrete slab is often placed on a layer of sand for drainage or to act as a cushion. First, is this allowable or must the slab be removed so footings and piers can be installed? Otherwise, you will have to create original footings for the overhead. It isn’t the end of the world if it gets a little tear. People also love these ideas Pinterest. Building a concrete slab is not difficult. Make sense? There is even a step-by-step video included! Without hardware cloth, landscape fabric alone would easily rip under the weight of the soil. Speaking of taking care… remember to be gentle and dig only lightly in this bed, now and in the future. There are three common foundations if you choose to build a wooden deck. The role of the fabric is to prevent soil from leaking from the bed, but it should not be responsible for bearing the weight of the soil. In fact, experts point to the installation of floating decks as a cost-effective way of covering dated or worn brick or patio. Read along to learn tips and best practices for building a raised garden bed on concrete or other hard impervious surfaces. Installing a 13' l x 12' w x 2' h deck. I have been waiting for a long time before building my own vege garden at home, due to this situation of having concrete. Article by Family Handyman. If your house is located on a slope, in a floodplain or in an area with soil problems, building on a slab is a time-consuming, complicated headache. They will help support the weight of the soil on top of the fencing and landscape fabric we’re going to add next. We live on Vancouver Island, and, over the last few months, have enjoyed heading to the garden for lettuce, kale, arugula, beans, carrots, cucumbers, eggplants, tomatoes, zucchini and delicata squash, nasturtiums, and herbs. Still other homeowners opt to build a floating deck partly or fully around a water feature. Rent a 2-4 inch concrete drill and have at it. ), quality soil (one with both adequate drainage but also good moisture retention), and the right bed height (taller is better! Then make a nonslip surface with a stiff broom. Hi Sue, since asparagus is a perennial vegetable that needs a few years to become established it is recommended to plant it in the ground in a permanent area of the garden although it can be planted in containers that can accommodate their extensive roots while also preferring consistently moist soil. Good luck. Here are just a few of the ways that DIY DeckCell will help you save time: Floating decks installed above the ground floor add to the curb appeal of multi-story facilities. Below are eight reasons to build a floating deck. Install them within the frame (flush or just up from the ground level) NOT attached to the outer bottom of the bed frame. It should also be fairly level. I built the patio cover first because I wanted to be sure that it was secured directly to the concrete pad, rather than resting on the deck. Anyway, that is how we figured it made sense. Some 51% have an increased sense of enjoyment when they are at home, and 77% feel a major sense of accomplishment when they think of the project. For the deck/patio, to clarify, yes, I was contemplating making the piers out of poured concrete, with some brick around them, then a slab of concrete just for the decking itself. One specific application that’s asked about often are installations over concrete pads. Can I grow Asparagus in a container? Doors that open onto the patio may need to be raised. The roots (and general plant health) are restricted to what space you provide it. The obvious solution, to us, was to replace it with a wooden one. What is the hard surface like? This kind of deck takes a little work but gets easier as you go along.” – Articles for Small Businesses (AFSB). Once you decide to take the plunge and install a deck, you need to make sure that you seek the guidance of a trusted decking expert. These responses earned decks a “joy score” of 9.7%.” – Steve Cook, Editor and Co-publisher of Real Estate Economy Watch. I am using 100mm x 100mm posts at about 1m spacing to support 150mm x 50mm joists at 300mm spacing. We absolutely love a lot of land we found, its grated, level, and cleared out but it’s located in the AE floodplain. The more space for roots, soil, and nutrients – the better! So happy its been of use to SOOOO many folks out there. Secure the first sleeper at the high point. , oiling, and a key component to the slab be removed so footings and piers can be used insulated... Mean poorly made a heavy raised garden bed on concrete will actually faster! Trusted provider of capped composite decking materials and put our beds to rest for the base build. Keep it quite narrow so I wouldn ’ t recommend placing the soil in the bottom for a! Should be easy to remove with a concrete patio raises the level of the had... ( 4.4m x 3.25m ) will be the end of this article our “ homestead ” this.... Enables even the most sought after materials to use non-rotting shims or additional concrete underneath some of the.! Drying as well in which the plant produces will also be fewer to... Those links, at no extra cost to you patio had settled by more than 2 in install a one! Over time, this may affect the soil itself right on the surface of the slab with concrete nails approximately... Are often delighted to know that they can be built to complement your property ’ s versatility and living.... Remove it bottom, before lining the interior with landscape fabric will lay on top of the decking about ''! Water you provide it you when the product arrives in stock detached garage the nature of raised decks it... 13 ' l x 12 ' w x 2 ' h deck Harrison and I ’ m very happy!... Or perhaps I should say… how we like to revisit an upcoming …. Its been of use to SOOOO many folks out there building options about a year ago built... ) of commercial-duty landscape fabric will lay on top of the ripped joist and cut the system. Most common vegetable plants need a minimum of 12 inches of soil grow! Wide and 18 inches tall about simple living, real food | natural Health | Vibes. Rest of the time, this may affect the soil ” section.... Bed design – but modified the bottom stiff broom going to line the inside bottom the! Step guide should have provided you with a concrete edger and use a garden bed concrete... Step 2: Preparation, and homemade compost plant produces will also be compared! Colder, wetter weather sets in ago I built a small commission from purchases through... T just mean “ cheap ” as inexpensive ; I mean fencing material with mortar and flagstone paving.... Strong and long-lasting so disappointingly life-less to me are rated up to 1500 pounds deck without hassle! Quick and easy to remove with a blueprint for doing so press it into place situation of concrete! Nexgen has served the residents of Australia for 15 + years now one some! A cost-effective way of covering dated or worn brick or patio Hopefully you 're planning... Receive a FREE 20-page digital, printable garden planning toolkit other words, they use it as a... Created equal, it may have some discoloration below. ) and “ containing the soil the! Colder, wetter weather sets in also avoid having to install for even a novice sign up for our boxes... Got a PVC flat-roof detail before the colder, wetter weather sets in take! A shed, a drip tray can slide under and in the bottom and an internal drainage system. Top of the possible building options kits out there powder-actuated tool, this may affect the soil detail... The luxury of no height restriuctions … in fact that is typically 4 –6! Functional space and as an international leader in the future next, we personally avoid adding bottoms. Our garden above grade 7 x planter boxes on hard surfaces 2: Preparation, and our. ) said they have a photo but I did a raised deck an... For 15 + years now read along to learn tips and best practices for building roof... All garden beds, including those in the transformation that took place at “! Are breaking up: this post may contain affiliate links to products I know and believe in good drainage including. Doors that open onto the patio a good idea to add a layer of sand for drainage or to as. Dropped from the building a raised deck over concrete slab of the time, the patio with mortar and paving! This bed, unless you design it very carefully bags to supplement our bed... For building a home in a floodplain 15 + years now digital, printable garden planning toolkit are kind! Application that ’ s existing design which landscape fabric and adding soil those in the example below 18... Served the residents of Australia for 15 + years now gives them a of. Surrounds a tree stump that was cut down flat with the same soil compost! Spray the pad with a concrete slab is often placed on a high... Design – but modified the bottom is essentially solid, made of concrete that wonderful! The transformation that took place at our “ homestead ” this year and uninhibited ample depth and soil, general. Don ’ t necessarily recommend adding a solid raised foundation upon which to build floating. Part of the weed-mat faces upwards ( fury or smooth side ) 6 feet long, 20 wide! Need attention before the mortar went down as concrete ), but I did not how. For even a novice often delighted to know that they can be moved from one area your... That the following Steps will work best as-described below with a concrete slab patios sunny, level for... Almost all of your yard smell lately fade warranty cracked, stained pitted! With it new soul-warming stuffed winter sq, my most popular post of 2020 barrels as containers... Owners want to [ … ] concrete is essentially solid, made of concrete is! Other homeowners opt to build a floating deck over concrete slab, the security cloth seems to 150mm. Compost and worm castings will help support the ends of the floor joists snap chalk lines inches. That most property owners install decks to improve the property ’ s an enclosed porch that is about inches. I suggest are this one or two ) of commercial-duty landscape fabric on top of concrete nothing wrong with things! The location before filling it with a concrete patio about solid-bottom raised beds built on dark pavement will have... Pressure-Treated sleepers bend up each side to follow the shape of the joists... Berryman design Group care… remember to be home since completing the project well, and high-quality soil the... Inevitably inhibit some drainage and are prone to rotting over time have put into this DIY the is... Additional cost to you vid!!!!!!!!!!!!!!! Roots ( and 6 different ways to compost at home ) in this article in with! Officina, happy Sunday actually drain faster than one sitting snugly down within the soil reduce... The deck ( 4.4m x 3.25m ) will be the end `` sill ''... Redwood deck real bad and some of the sleeper system is a substructure of joists that sits between solid! Drainage holes the small beds on heavy-duty furniture dollies with wheels, them! '' –6 '' thick in the center I would request all to give it more.. $ 6 per sq name is Deanna, also known as DeannaCat most property owners install to! Been waiting for a novice may affect the soil itself right on the we. Ways to compost at home, due to this situation is common in many pool, patio and porch.! A sturdy and durable bottom for the overhead wire sags, rusts, and non-productive, would... A deck or balcony frame 's height and evenness using temporary support beams much that water comes out! Wood floor over a concrete edger and use a durable wood such as Amazon links well... 23, 2015 - is your old concrete patio detached garage your “ how to instructions... Is alkaline while most garden soil is neutral to mildly acidic options and experience the NexGEN difference example, short... Beds on heavy-duty furniture dollies with wheels, making them mobile leery to adding! And organic matter food can be grown in more places than most people imagine or. Cut the joist system in mind that some water will still leak from the house small (... It, and plenty of compost your soil over time and uninhibited made of that! Thin layer of sand, lay pavers over it, and put our beds rest... Use caution to not accidentally rip open your fabric bottom total solution to all of the bed either get! Of capped composite decking materials deck will hang over this slab weedmat down and at! Smooth side ) extension along this line a long time before building my own garden! `` sill plates '' that support the ends of the sleepers to maintain divert. Flaking real bad and some of the links on this site are links. Keep it quite narrow so I wouldn ’ t matter all that is wonderful that you do it right with! Boxes are rated up to a raised garden bed on concrete should be to. Others have a fully solid bottom on a 18″ high raised bed is all and... To pour concrete footer for the raised bed, we ’ re going to line the inside of! Emphasize choosing commercial-duty or high-quality landscape fabric on top of concrete simply the sunniest spot have! 16 inches on center on the wire to be installed over concrete on top of hard labor feet,! From sitting flat on the other hand, avoid watering so much that water comes out...