How to build a shed on an existing concrete slab

I want to build a shed 7' x 14' on an existing slab, which is somewhat larger than the shed will be. The slab is at the level of, or slightly below, the surrounding earth, and doesn't drain well.

So I am thinking of building a raised wooden floor. My plan is to use 2x4' joists to keep the 'step up' minimal several yard machines to roll in and out ; they won't really be 'spanning' anything, but resting on the slab. Or should it be isolated from the concrete with some sort of spacer? First shed project for me; I'm sure it will be interesting. Click here to post comments. Return to Shed Foundation Questions.

Building a shed on concrete slab by Gary I want to build a shed 7' x 14' on an existing slab, which is somewhat larger than the shed will be. Return to the Building A Shed home page. Shed Designs 2. Building a Shed 3. Your Shed Design 4. Potter's Shed 5. I promise to use it only to send you Shed Building Monthly.

Home Privacy Policy Disclaimer Contact. Email Name Then Don't worry -- your e-mail address is totally secure.We have just bought a house and despite my desires, I am not up to many of the projects the house needs so I am relegated to reach my glory with a new shed. The shed will go over a concrete slab that once housed a metal shed.

How to Build Concrete Slab for Shed ? 5 Best Step by Step Tutorials

The concrete is in good shape and is 11x8. Here is my question Do I need a power hamnmer to connect the wood to the concrete? And, does my new shed have to fit exactly over the slab or could it be bigger?

I have some shed plans that I will probably use god help me when i get to the roof but my first question relates to the floor. Please help if you can add anything to this. The walls could be on the edge of the concrete slab assuming slab is square but not larger.

Why do you want a wood floor over a perfectly good concrete surface? It's only extra work and expense. They come in different lengths. You will need a masonry bit, drill the required size hole and then pound the stud into the hole.

Once tightened it spreads to hold the stud and therefore the wall in place. A very strong method of fasteneing and it's what I used. Thanks Cruise. That makes sense That's what a neighbor recommended.

So, without a floor the door frame would allow for a seemless entry into the shed without having to go over the frame. Conceptually I am a little challenged but I want to give this a go. What is better putting in floor heating directly on a concrete slab or using a crawl space?What is the most economical building method to build a 10, Askville question: what is the most economical building method to build a 10' x 12" wooden shed on an existing concrete slab : home improvement.

How to build a concrete shed base a diy guide to laying, This is a diy guide to laying a garden shed base. Please help -- building a shed over an existing concrete slab, Andrew, as a tip once you have the base plate and wall studs anchored to the concrete slab, put a bead of polyurethane caulk around the primeter between the base. How to build a shed foundation - cheapsheds. How to build a storage shed : frequently asked questions, 2.

How to pour a concrete slab for a shed ehow, Dig a hole four inches deep where the slab will lie.

how to build a shed on an existing concrete slab

How to build a shed on a slab ehow, Construct the roof structure first. CMU Wall Details. Ceramic Tile Installation Details. Stamped Concrete Sidewalks. Wood Deck Over Concrete Patio. Post a Comment. Sunday, December 28, How to build a shed on an existing concrete slab. Labels: aanBuildconcreteexistingHowonShedslabStoriesto. No comments:. Newer Post Older Post Home. Subscribe to: Post Comments Atom.In other words if you are building an shed then build an slab. This way the siding will be able to hang over the side of the slab an inch to prevent water from seeping under the bottom plate and into your shed.

how to build a shed on an existing concrete slab

If you want to put an apron in front make sure it slopes away from the shed or is a little lower than the. The main problem with trying to frame a shed on an existing concrete slab is trying to set the sill plate. The actual framing follows a standard process, the only exception being that you may have to toe-nail to attach the.

I have some shed plans that I will probably use god help me when i get to the roof but my first question relates to the floor. Please help if you can add anything to this. You could build you shed right on top of the concrete slab, just like they do with a. With both cutting and filling, you should ensure you also level out at least 1 to 2 metres around the shed edge. This allows easy access to build the shed, and afterwards for maintenance of the shed and ground.

Leaving a generous level pad around your shed also prevents erosion, which can undermine your slab foundations. Where to add concrete. It can sit on the ground, on a gravel or concrete pad, or off the ground on and still be movable. Remember though, wood that sits directly on the ground will eventually rot. After you place and order for a garage or shed from Sheds Unlimited, it is time to prepare either a gravel shed and garage pad or a concrete pad for your shed or Here you will find instructions for building a concrete pad for a one car garage or a multiple car.

Complete the two remaining sides after the frame is leveled. Pour the concrete and screed the pad using the 2x4. Preparing for your storage shed from Sheds Unlimited is an important procedure. We recommend placing your shed on a gravel storage shed pad as outlined below. Please follow the storage shed pad or car garage pad instructions as.

We will begin by looking at the step by step shed building plans used to build wooden sheds. Shed building plans.

how to build a shed on an existing concrete slab

After the concrete is all ready, the sole plates are then joined together with.A shed is a necessity for any backyard where you want to maximize your storage. If this is your first time building a shed floor, it is a relatively simple process. After reading this guide, you will have all the necessary information to build a solid shed floor that will last the life of your shed.

They are much cheaper and more user-friendly, especially if you are new to shed building. Lay out your deck blocks and level the ground around them. They should be placed an equal distance apart, every 4 to 6 feet, so there is stability on the ends and in the middle.

Tamp down or dig the ground so that you have a nice level surface to support the frame of your floor. Some people will say that you can build the frame with 2 x 4 lumber, but I prefer to use 2 x 6 pressure treated lumber instead. The added stability from a 2 x 6 over a 2 x 4 will be noticeable, especially if you are looking to store heavier items. Take your measurements for all four sides and cut the lumber accordingly. I like to use a speed square to mark the cuts and as a guide for a circular saw.

You can also use a miter saw or chop saw if you have one. Make sure that your measurements are exact. This is the time to tap into that OCD that everyone tells you is a bad thing.

Once you have your cuts made, nail the frame together with the 3 inch 16d framing nails. Make sure to put three nails to join every board, one on top, one in the middle, and one on the bottom. The four planks should form a box at this point. This is an often overlooked step, especially by beginners. You need to make sure that the frame you built is square. This is a relatively simple process.

Just take a tape measure and measure diagonally from one corner to the other. The measurement should be the same. Measure again and repeat the process until you have a square frame.

I like to put the first joist right in the middle of the frame. If your frame is square from the step abovethen you should be able to cut each joist the same length. Measure out your joists and like above, use the speed square to help make your cuts with the circular saw. Once you have all your joists cut, mock up the frame by placing the joists inside the frame.

You want your joists to sit 12 inches on center. Some people will tell you 16 inches is ok, but I like to make my shed floor extra strong. Mark the inch increments along the length of the frame. When I do this, I like to make sure that my measurements on both sides are exact.Discussion in ' In the Garden ' started by jell12 Aug If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

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How To Build a Shed Floor [Step-by-Step Guide]

It's going to be approximately 5 x 3 metres. I've been researching the different options for a base, however the patch of ground I will be using consists of old uneven concrete around an existing, much smaller, shed, as well as paving slabs inside the existing shed as the shed floor at roughly the same level as the surrounding concrete. I would like to build a timber floor for my shed in order to have somewhere to put proper insulation underfloor, however I can't find any advice of supporting a timber floor on existing concrete.

Also, I want to avoid pouring a new layer of concrete on top as I know it has to be a certain thickness to not be liable to cracking, and I think this would add a lot of expense to the project. What would you recommend for this?

Thanks in advance for your help. Build up low pillars of blockwork, bricks or 50mm thick paving slabs. Adjust the heights to suit by packing out the mortar beds with old roof slates, tiles etc. Sit your floor structure on this.

Deluks13 Aug Hi Deluks Thanks for the advice - that sounds pretty sensible. Given the width of the shed 5m I was thinking then to have 3 supporting "walls", which would effectively be a 1 brick high wall, bedded out to level as you suggest, then using 2x4s at 40mm centres for the main floor joists.

Do you see any problem with this or would this be sufficient? I don't think the existing base is going anywhere, it's probably 40 or 50 years old and it doesn't show any signs of having moved. Then, another question - on top of these walls, should I put a timber wall plate between brick and main timber floor, or is it sufficient to build the frame directly on the bricks?

I'd like to avoid the extra height if possible, but not sure if this would make it hard to get the floor completely level? Joined: 3 Sep Country:. Select the supplier or trade you require, enter your location to begin your search.

Please select a service and enter a location to continue You must log in or sign up to reply here. Show Ignored Content. Sponsored Links.A concrete shed base is the strongest type of shed foundation.

It is at the heavier end of the work you will do to build your shed. This article will help you to decide if you really need such a heavy duty solution or if something a bit lighter and simpler to install would work just as well.

Concrete Shed Base

To keep you on the right track I have split this article into three parts. This will help you from the first stages of deciding if a concrete shed base is right for you, to considering the details that you will need to build a concrete slab and finally how to actually build a concrete shed base. What are the pros and cons of building a shed on a concrete slab?

Five Ways How To Build A Shed Floor – Design and Construction Ideas

Make sure that you really do a need a foundation of this type before diving in. What thickness of concrete do you need and what volume? What type of concrete mix? Is steel reinforcement required?

And of course how much is this going to cost? A concrete shed base is without a doubt the strongest and most durable form of shed foundation. It is also the most costly and labour intensive. Before you start building let's get clear on some of the benefits and downsides of using a concrete slab to build your shed off. A concrete slab is without a doubt the most durable form of shed foundation. Dense well compacted concrete provides a level stable base that is resistant to frost and localised ground movement.

A level concrete slab is a good base on which to construct a timber sub-floor. Damp from the ground is minimised by using a PVC damp proof membrane beneath the slab. Use treated timber battens to raise the timber floor deck off the concrete surface to stop damp getting in to the floor. This also allows air to circulate beneath the floor which enables damp air to dissipate. View of timber sub-floor supported above concrete slab 3.

Enables shed floor to be built close to grade for flush thresholds and minimises the need for a shed ramp. If you have wheeled equipment that you need to get in and out of the shed, having a concrete floor means that the level of the floor can be close to ground level.

I recommend that you don't have the floor level at the same level as the ground as any small pooling of water can then get into the shed. Building the shed with the floor about mm higher than the surrounding ground then there is no need for a big ramp to get the grass cutter into the shed. View of concrete shed base showing how close the surface can be to the surrounding ground 4. Suitable for storing garden machinery and other things that are put away wet.


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