How can I properly support a raised concrete patio?


FWIW, that's technically called a "raised patio" rather than a deck. At 40' long, your challenge will be to prevent I'd count on putting in expansion joints.

If you want to ensure a solid base, you need to use crushed rock and add it layer-by-layer mechanically compacting each layer before adding the next. That's going to be some work to get up to 12", but certainly doable. You'll likely raise it in 3-4 layers.

At that point, you're essentially building a slab-on-grade foundation. So you shouldn't need any actual foundation walls.

All that said, check with local code first!

Note, however, that if you're ultimately capping with stone, you really don't need all that concrete on top. You need a retaining wall to retain the layers of compacted rock, but you can then place the stone right on top of that on top of a layer of...

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The best thing to do and it's the code in Virginia, is to put aluminum coil in between the wood and the concrete.
I would advise locating a vinyl siding company and getting them to break some scraps that they have laying around about an inch higher than the concrete will be poured and as far out from the house as the scraps will go. If you are pouring 4" have them break it 5" high.
As you install the metal, shoot some silicone caulking behind it. Just nail it with roofing tacks enough to hold it until the concrete is poured. I always wait until the last thing, just before I pour the concrete because the weight of it will spread out the silicone a lot better than any other way.
If you look you should be able to find someone with a color at least close to the same color as your home. If not, go for an abstract color. Maybe a color that matches some trim on the house.
Send me an email if I can help any more.
At least give me the best answer...

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The concrete around this swimming pool is two different shades. There are several ways to make it look much better and change the color at the same time. (Tim Carter)

I’ve got an in-ground swimming pool at my home and my wife is not too happy about the concrete deck around the pool. The concrete was poured at different times and it’s cured to three different shades. She’s asked me what can be done to make the color uniform. Are there any affordable options? Is this something I can do myself? What are the pitfalls? — Mike D., Cincinnati

What’s that old saying? A happy wife means a happy life. I’m about to crank up the happiness machine for you and her at the same time. You’re going to have to do a little work, but the end result is going to be stunning and long lasting.

You’ve got several options to transform your concrete’s appearance. The good news is one of the methods is very DIY friendly. This DIY method even allows you to drastically change the color of the...

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The question “What is necessary’’ to pour over an existing floor raises more questions…but taking it at face value, it is possible to place a concrete slab on top of another one, people do it all the time. If the concrete is sound, without at any serious cracks or buckling, I would lay a bond breaker, either 15 roofing felt or plastic sheeting over the existing slab, set a form around it and brace it off, then place the new slab, adding fiber reinforcing to the mix to reduce cracking in the future.

Normally, concrete is set ‘’hard’’ in 12 to 24 hours, and for all practical purposes, it is cured after 28 days, although it gains strength for a long time afterward.

As far as the question, what is necessary in some instances would be a design plan, building permit, inspection by code enforcement authorities, contracting a readymix plant to furnish the concrete, form boards and supports, finishing tools, curing compounds, plastic sheeting, workers to help, and a cold beer...

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If you want to lay a patio using a type of concrete patio slab, then it is a good idea to begin the process by working out the thickness of slab that you will need for your patio. This can sometimes be a calculation, or it might be learning the type of thickness that your specific patio slab will need to be. However, knowing the thickness of your patio slab is vital to getting a good lay, as they can affect the size of the corner brackets, and also how much concrete you will have to lay down in order to ensure that the slabs stay in position for years to come.

Step 1 - Work Out the Ratio

Before you can do anything else, you will need to work out the ratio of concrete thicknesses. The thickness of the slab will need to be slightly smaller than the area of the hole that you have dug into the earth to accommodate your slab. The depth of the hole will also have to be filled with gravel, a depth of about 4 inches is the industry norm. It is also considered acceptable to...

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The first step required for DIYers to resurface a concrete patio is to make a trip to the hardware store and buy a suitable resurfacing product. I bought QUIKRETE, myself, but other options are generally available as well. My own project was necessitated by the fact that I had to raise the level of my patio about 1/2 inch where it meets my driveway, so that it would be flush with the driveway (its unevenness made the area subject to tripping).

QUIKRETE® Concrete Resurfacer is intended for precisely such thin applications.

This is a fairly easy do-it-yourself project for beginners. It will require about one hour of your time per 5 square feet of surface to be covered.

Instructions to Resurface a Concrete Patio

Buying a product specifically designed for resurfacing concrete is a key step in this DIY project. According to the QUIKRETE website, "QUIKRETE® Concrete Resurfacer is a special blend of Portland cement, sand, polymer modifiers and other additives...
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A patio serves as a gathering for family members and friends for outdoor fun, barbecues and other gatherings. While there are a variety of options for patio layout, many homeowners choose concrete slabs, which are inexpensive compared to other stones and can create a safe, uniform patio surface. Installing these stones requires extensive preparation to ensure a level surface and proper drainage below your patio for a lifetime of use.

Put down wooden stakes to lay out the design for your patio area. Tie long nylon cords between the stakes to mark off the area.

Excavate the area 7 inches deep, using a garden spade or flat-edged shovel. This will remove grass and loose soil, revealing the sturdier subsoil below. Check periodically with a level and tape measure to ensure that you are maintaining a uniform 7-inch depth.

Level the newly-exposed area with a plate compactor or hand tamper. This will create a smooth, even surface to support your patio...

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It's easy to pour and build a backyard patio made of concrete in this How To article. On a small scale, concrete is fairly easy to work with, but installing an entire patio can be a challenge. It is possible to build an attractive concrete patio yourself, but careful planning and preparation is necessary. Be sure to place all the concrete at once; a big patio can be broken down into smaller manageable sections using 2x4's.

Once concrete is in place, you're stuck with it forever; replacement is costly and difficult. Planning is essential for a perfect DIY conrete patio.

Build and install forms, making sure they're level and properly graded for drainage. To prevent rain puddles from forming, design a 2% slope (every 10' long will drop 2.5"). Place and level a 4"-6" bed of gravel; you need a gravel base in areas of poor drainage or freezing temperatures. Be sure to compact the gravel base and rent a compacting machine if necessary.


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I am not sure what a water snake is, but it sounds interesting. Unfortunately there is no easy fix for a slab of concrete that doesn't drain properly. You could try cutting a drain into the patio where the water is pooling, but by the time you cut the slab and get a drain installed and put it all back together you may as well cut out the section that is not draining properly and pour a new slab. Anything you do to try and divert the water will probably become a trip hazard on the patio and trying to shave down the slab to create the proper drainage will look just like shaved down concrete. I wish I had a simple fix for you, but concrete is very tough to change once it has been poured. Good...

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Free Estimate For Patio Repair!

Click Here To Get A Free Estimate!

A concrete patio is a great thing to have but sometimes, over time, cracks will form and can eventually become a danger. These cracks form because the soil supporting the patio has fluctuations in moisture. As the moisture levels rise and fall, this can cause spaces, or voids, under the slab into which the concrete will sink.

The last thing you want happening to your patio is having it slope to one side or sinking and full of cracks. Our concrete raising service can restore your concrete patio to the correct height and level.

Leveling Concrete Patios

Our mudjacking and polyjacking processes can level your patio in a matter of hours. This is an ideal alternative to completely replacing the entire slab because it costs much less and will have very similar results. This is done by injecting our cement slurry or polyurethane foam into the space below the sinking patio and carefully...

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How to Build A Raised Patio

Want the look and feel of natural stone without the maintenance? A raised patio has many advantages over a wooden deck:

No maintenance Create any shape Have many levels No under deck mess

An Allan Block raised patio may be just what your project needs. You can incorporate curves , corners or even stairs into your patio design. Building a raised patio is easy and can add more usable living space and lasting value to your landscape.

5 Simple Steps

Sketch out a design Use the AB Estimating App to get your material list Construct a retaining wall to build the raised patio Install pavers for the outdoor flooring Add an AB Courtyard patio wall to create an outdoor room

Building a raised patio is easy and can add more usable living space and lasting value to your landscape

Place the blocks on the base...

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Raised Concrete Deck

So a house I'm doing had originally called for a wood deck off the rear. About 1200 square feet. Owner liked the woodgrain stamped pattern concrete sidewalks on the front so well he decided he'd rather have the same on the rear deck. So, having never done a raised concrete deck, I started sniffing around and came up with a plan. Here's what I have:
Deck is just below slab level. Brick ledge is three feet down. So we bolted a 2x12 ledger at the proper height to the slab. Poured a footing 8' off the house. Double 2x12 beam sits on 6x6 posts every 4' on said footing. Joists come off the house and cantilever over the beam by 2', for a 10' deck. At this point I had the rock guy lay 8" block...

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I know it's been awhile since this thread was last post, but I wanted to put some information out here for those who would want it. I have quite a few years in the pre-cast concrete business and you need to deal with more information than what I've seen posted here. First, in most parts of the country, your 'deck' only needs to be engineered to 40 psi loads. Most wood and composite decks that are passed before building departments meet this minimum. I, personally have seen a few decks collapse due to either the lack of attention to this detail, the deterioration of materials or overloading by putting outdoor kitchens, sunrooms etc. into the space after the deck was built. Always with people on them. Over engineer. It's smart.

Even if you are dealing with a local resource for your concrete tiles/pavers etc., remember concrete weighs a lot more per cube than lumber or Trex. That really adds to the shipping costs! IE: Stepstone is in California. Putting a load on a truck to...

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