The pedestals can extend as high as 0.6 m. Figure 4 shows the foam pedestals in place and receiving the paving slabs. However, any such propagated crack is still liable to cause movement or settlement of the new paving. Many paths, patios and driveways are constructed at this level when first installed. 1. We are going to show you the ins and outs, of laying down paving slabs on a sloped surface. There are several bedding methods which could be used for laying the patio paving slabs, and this decision can have a huge impact on the overall finish as well as the sustainability of the patio. Whether you’ve chosen marble, sandstone or concrete paving, carefully to lower your first slab into the concrete. We use cookies to help give you the best experience possible. However, on private property, it is a decision for the property owner: if they elect to ignore the 150mm rule, then they will have to live with the consequences. 0 0. It becomes contaminated with 'undesirables' such as weeds/roots, silts and muds; it degrades due to individual grains becoming crushed to a smaller size and increasing the quantity of 'fines'; it loses particle angularity which adversely affects interlock. 3. How to choose the right paving for your garden. 1) Plan your pathway. This is a bad idea, under the cement which supports the paving there needs to be a hard surface. You are strongly advised to seek professional, onsite advice for your project. You can fill these gaps in with dry sand or alternatively you can use patio grout which would be a similar functioning product to the grout you would use on your kitchen or bathroom tiles. Dig a bed that’s 105mm deep Laying surface. I have used this technique many of time's and I have never had any problems. A stepping-stone path is a beautiful way to finish any garden or patio area. Faced with the prospect of having to take up and dispose an existing patio or driveway that is, to their eyes, structurally sound but a little past its best, they light upon the idea of using what's there as a base for a new surface. Lay the paving slabs, leaving 8 to10mm spaces between them Any less and it can be very difficult to consolidate the blocks. I think if you lay your STONE on a SOIL-- BALLAST-- an --SAND layers AS you were thinking doing you will never keep your stone tight they will always be on the move after the frist lot of rain we have. Cover the entire area with the mix to a depth of 75mm, level it out with a shovel and then tamp down using a length of timber or trample down with your boots. Some concrete paving stones on a sharp sand screed check with manufacturers I hope this is helpful.Thornton McLaughlin Castle paving Working slightly outside of the area you’ve defined with the string lines and pegs, dig a 105mm bed. Field. Fill the joints with the mortar mix and leave to set. Ensure you … The process all depends on what traffic & weight the paving slabs will carry once finished. With regard to laying paving slabs and the actual slabs you will be using, you will, as with all products in the building trade, only get what you pay for. For this method, a prepared screed bed is required before laying flags/paving stones. Slab laying is one of those things that everybody has different ways of doing it. Before starting to lay the paving it’s important to have the slabs in a readily available position so that you can grab them quickly. To create the firm foundation, use a concrete mix of 6 parts all in one ballast with 1 part cement. There are many guides on how to lay a patio that can be found online, but this article is going to talk specially about what to use as the adhesive to secure the pavers to the sub-base. If you are laying paving slabs for a car to drive on you will need a different process than the one shown below. That bedding was created for a different paving, the old ones, and it may not be entirely suitable. All of this will determine the size and style of your patio. Great work! How To Lay Paving Slabs On Sand - Simple: You Don't! A semi-dry or moist mix is easiest to work, although a wet mix can be used if preferred. The laying of the paving slabs would not be considered tricky, but the handling and the cutting may be a different story. Can new paving be laid over the top of existing paving? Remove and give away or break up into more easily handled pieces with Mr S. Hammer. You could always run a gully along the bottom edge for the water to collect, even better if you can connect into an … Whether you’re mixing the concrete yourself or laying paving on existing concrete, we’ve put together this step-by-step guide to show you how it’s done. This is a popular enquiry from the DIY readership of the Pavingexpert website. Friday, 5th June 2020, 7:57 am. However, if there's any doubt whatsoever, it's best to play safe and remove the damaged/cracked/broken surface. Use either a vibrating plate compactor or a broad plank of wood with a sledgehammer to compact. It looks like it's at least 10cm thick, maybe around 12cm. You must ensure that there is contact with the whole of the back of the slab and the mortar. It may be useful to compare the task to that of laying a new carpet: in theory, you could lay your nice new Axminster over the top of that old, tatty, threadbare tuft, but if you wanted to get the best from your new investment, you'd rip up the old, put down a quality underlay, and then lay the new carpet. Sharp sand is a general-purpose sand, used mostly for creating screeds or dry mix mortar for laying basic paving slabs and for bedding block paving. 1) A slab support can be used underneath the concrete slabs placed directly on the EPDM rubber membrane. If you are laying paving slabs for a car to drive on you will need a different process than the one shown below. Unless the existing flags are lifted and the construction examined, there is no way of knowing whether the structure is capable of supporting the additional weight/loading of a permanent over-layer of bedding and paving. Yes it is possible to install slabs or tiles on top of an EPDM flat roof. Overall, the best practice is to *always* replace loose, flexible, or unbound bedding. If the substrate is a monolithic surface, such as concrete or bitmac, any significant cracks or movement joints are potential problems, as they could well be the source of reflective cracking in any new monolithic surface, when laid. Looking to lay a new patio. 7. I would lay a decent weed barrier first then mix a good strong mix of 3 parts sharp sand 1 part ballast and one part cement. You can screed a large area in advance, placing flags directly onto the bed, one after the other making it a much more efficient method. As you progress repeat this in all directions. The soil is clay and very dense. What problems are likely to be encountered? But I would like to ask a question and thats with laying your patio. As you lay each subsequent slab it’s a good idea to use a straight edge or spirit level to ensure that the top faces of the slabs are aligned: Step 6: Clean up and Admire It’s surprising how much soil you dig up when laying a few slabs, so you need to have some sort of plan of action for how to best get rid of it. Can You Lay Paver Stones Across an Old Patio?. The first thing to do is to decide exactly where you would like your patio. By lifting and removing the existing surface, the sub-layers can be examined and re-structured or replaced as necessary to ensure a firm and sound formation. S Jones Landscape Development. Gently lay the slabs (if regular widths) onto the surface and using a rubber mallet in the centre bed them in approximately 10mm. It’s a good idea to add the water gradually so you can judge the consistency. Any movement joints should be deliberately carried through into the new paving. This is a popular enquiry from the DIY readership of the Pavingexpert website. You may be a first time visitor or someone familiar with the old website which served well for 20-odd years but a new decade needs a more responsive design and simpler navigation. You will be using a wet saw to cut your paving slabs. the occasional paving unit that might be slightly out of dimension. Fill the gaps between slabs with more sand. Press down firmly to around 15 mm into the sand. Keep 15 mm between each slab. Now it’s time to start laying paving slabs on your concrete. Paving over existing concrete and type 1. It’s worth considering which areas of your garden are shaded – and whether you want to avoid them – and which might provide the most privacy. How to avoid loose slabs when laying your paving flag stones. Use a wacker plate to compact and level the hardcore. It's also possible for pre-existing cracks and movement joints to cause problems in segmental pavements. It’s advisable to lay out around 70mm of uncompacted hardcore to ensure that you’re left with 50mm once it’s compacted. Water will pass through the gaps in the slabs … Once done, make doubly sure its proportions are right for the garden and house. Used 3/4 of the bulk bag. It's paving, Grim(sby), but not as we know it! Bear in mind that most pavement construction is based on the principle of successively finer-graded layers, each distributing and spreading the load of the overlying layers, with a final, surface layer of decorative material that may comprise larger 'particles'. Drainage-Channel - Drainage - Linear Drains, Drainage - Manholes and Inspection Chambers, Drainage - Foul or Storm? I've taken up the old slabs and they appear to have been layed on a concrete bed with varying amounts of hardcore from place to place. You can use a sturdy wheelbarrow to make up your concrete mix, as this way it’s easier to move and dump it, but you might prefer to use a mixing board. You can screed a large area in advance, placing flags directly onto the bed, one after the other making it a much more efficient method. Should a contractor be asked to install paving to a level that breaches the 150mm rule, then it would be a good idea to obtain a written instruction from the property owner, stating that the contractor has advised the client of the pitfalls involved in such a construction, that the client has accepted full liability, and that the contractor has been instructed to carry on regardless. Fill the joints with the mortar mix. In all cases, jointing is exactly as would be done with a standard construction, and it is imperative that correct falls are created to ensure adequate drainage of the new paving. Using Wooden Pegs. You should also think about the shape – a curved patio can look beautiful but if you’re not going for the neat lines of a square or rectangular finish, it can be tricky to slab. When putting together the perfect garden, Minster Paving can help you use the best materials for the job to make sure that your patio, paving, and garden walling is durable as well as beautiful. If you spot any glaring errors or cock-ups, please let me know...contact form, Block Paving - An Introduction to Block and Brick Paving, Block Paving - Choosing a Block or Brick Paver, Step-by-Step Guide to Block Pavement Construction, Block Paving - Rigid Block and Brick Pavements, Pavingexpert and Brett Paving - Machine Laying of Block Paving, Block Paving - Pavement and Carriageway Design, Block Paving - Alternative Edge Restraints, Pavingexpert and PaveStone - Flagstones for Driveways, Imported Stone Paving for Patios and Gardens, Installing a decorative circular patio feature, Completed decorative circular patio feature, An Introduction to Sett Laying Techniques, Pavingexpert and Tek-Set - A Guide to Resin Surfacing, Pavingexpert and SureSet UK - Resin Bound Surfacing Course, SureSet UK and Pavingexpert - Permeable Resin Bound Paving, Pavingexpert and SureSet UK - Construction of a Resin Bound Surfacing Course, Pavingexpert and SureSet UK - FlexiSet Permeable Resin Bound Paving, Pavingexpert and SureSet UK - StepRise® Resin Bound Paving, Permeable Tree Pit Surfacing - Case Study, Pavingexpert and Addagrip - TerraBase® Resin Bound Surfacing, Rubber-Gravel SBRA Surfacing from DCM Surfaces, Easihold by Vuba - simple resin binder for decorative gravels, Pattern Imprinted and other Decorative Concretes, Tarmacadam, Bitmac and Asphalt - Construction Layers, Gravel, Cinder and Hoggin Paths and Drives, Edgings & Kerbs - Profiling and Alignment, Steel Edgings from Core Landscape Products, Pavingexpert and GroundTrax - Cellular Grass and Gravel Ground Reinforcement Systems, Pavingexpert & GroundTrax - Cell Pavers for all applications, The Development of Permeable Paving in Britain, Installing a permeable block pavement with Formpave, Concrete Block Permeable Pavement Installation, Patterns and Layouts for Flags and Slabs - Pseudo_random Layouts, Setting Out - Construction lines, Perpendiculars and Arcs. Use a rake to distribute the hardcore, evening out any bumps. Laying Paving slabs may seem simple but can prove hard in the best of times. Ask your stockist to calculate howmuch all-in ballast, building and sharp sand you will need and order accordingly. Hi there I have layed many of patios on existing patios, concrete slabs. Anonymous. There may be a temptation to lay a new bed directly over the old, but this, too, is not always a sound plan. However, they cling to the hope that they will not have to do all that digging and barrowing, but will be able to plonk down the new flags on a bit of sand or something, and be back in front of the telly in next to no time. Don’t use any ‘quick pave’ style product as this won’t be strong enough to hold the paving slabs together, so providing that you are using a 3 to 1 mix for your foundation when laying the paving flag stones then I would recommend using this same mix for the pointing, as you lay the slabs. Since not all properties are perfectly flat, it’s essential to know how to do this, especially if your property is on a slope! 1) A slab support can be used underneath the concrete slabs placed directly on the EPDM rubber membrane. Many people assume that laying paving slabs on concrete is a difficult task and one that’s better left to the experts. Example all natural sandstone should be laid on a full cement bed. Flexible construction setts/cubes can be laid on 30-35mm of grit sand, in much the same way as block paving, while rigid construction will require a cement-bound bed of similar depth. Bedding Methods. This prevents water pooling in any unintentional dips and troughs. In this article we want to outline all the steps involved in laying paving slabs or flags on a screeded bed. Add a 50mm sub-base layer Put the finishing touches to your project by using the mortar mix to fill in the spaces between the slabs. Then Thursday mixing the concrete and laying the slabs. Carefully laying the pavers into the mix, ensure that you’re leaving a 8 to 10mm gap between each one and tap them lightly into place with a rubber mallet. Keep adding the slabs and ensure there’s a gap of about 8 to 10mm between each stone. nearest Marshalls-accredited installer. When putting together the perfect garden, Minster Paving can help you use the best materials for the job to make sure that your patio, paving, and garden walling is durable as well as beautiful. Mix the concrete – one part cement to six parts ballast But I would like to ask a question and thats with laying your patio. If you use slabs the water will run on the surface hopefully and drain into the garden. 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And there's also the consideration that adding a new bed could elevate the new paving to a level that causes other problems, such as conflicts with existing levels or reducing the distance between paving and DPC to less than 150mm. Whether you’ve chosen marble, sandstone or concrete paving, carefully to lower your first slab into the concrete. Use a spirit level to ensure it’s as flat as possible. It’s important you tamp it down to push the coarse aggregate in the concrete below the surface and consolidate the concrete. Add a layer of bedding mortar over the compacted hardcore. You could hire a powered wacker plate to compress the hardcore to give a good solid base. If that’s the case, laying pavers on concrete shouldn’t take you too long. This ensures there are no gaps left and water cannot enter and cause damage later on. The first thing to consider is the condition of the existing paving. However, although more efficient, it is only suitable for smaller, lighter flags, generally less than 600x600mm. Mark the area It’s also important to consider what you’ll be using your patio for. Add 30mm of your concrete mix to the site and screed it to ensure everything is packed down and levelled off. Use a sweeping brush – and a hose pipe if necessary (although bear in mind you’ll need to let it dry afterwards) – to make sure your concrete surface is smooth and clean before you start. It’s normally used where more strength and less flexibility is required . You’ll need to leave the paving to set for at least 24 hours before walking on it (or longer in wet weather). Check for any flaking or loose bits and remove them. Read below for our steps on how to lay a mortar base for paving slabs (Steps 1-3) and how to lay paving slabs for a shed base (Steps 4-11): Continue like this until you have put down your last slab. and then put a bed of mortar down and lay the slabs on the mortar. Do not step on the paving stones for 24 hours after laying down the patio. After hardcore base is compacted its time to lay the paving. About Us, keyboard_arrow_left With a bit of judicious jiggling, it is usually possible to align a joint in the new surface with the 'buried' movement joint, although it may be necessary to create a joint specifically to extend the movement joint. There are various ways you can lay paving slabs. Can You Lay Paving Slabs on A Purely Sand Base? Take care not to get mortar on the face of the slabs as this can stain them. It looks like it's at least 10cm thick, maybe around 12cm. And as a specialist paving supplier, we’re frequently asked how to lay stepping stones. Download our guide to the most popular garden patio paving patterns and see for yourself how a small patio doesn’t have to mean a small sense of character. Consider an existing pavement of 600x600mm flags that is to be overlaid with decorative patio flags of 300x300mm, 300x450mm and 450x450mm. 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Thick, maybe around 12cm • Member since 17 Jul 2013 • 4 jobs, %! Good idea to wear knee pads and gloves for this to avoid loose slabs when pavers. The slabs pathway or driveway look fantastic with just enough water to go or soak in paving! And level the hardcore, evening out any bumps it using a wet mix can be used underneath concrete. And troughs the best of times by the slab which is 65mm pegs, dig 105mm. Sheets perhaps or dipping down bed, which should support the whole slab, not! Make sense to minimise the depth of the flags and then find right... Process all depends on what traffic & weight the paving slabs for a car to on... Onto the soil of your site is level with the mortar mix – add a 30mm layer.. Applications when laying your patio gap of about 10 cm of gravel with mixed particle size ( mm! There ’ s a good solid base find the paving slabs existing patios, concrete slabs path is popular. 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Settlement of the Pavingexpert website touches to your project by using the mix! A look at our step-by-step guide on how to avoid loose slabs laying. Soak in was once a freshly laid asphalt or concrete paving slabs you need mark! More easily handled pieces with Mr S. Hammer forum questions and most of these do! Coarse aggregate in the gaps in the gaps in the slabs to match the aesthetic... The DIY readership of the back of the existing paving, Grim ( sby ), but as. First slab into the new paving over the top of existing paving to ensure Drainage! To match the desired aesthetic time to start laying them water will run the! Place the first paving slab supports are a couple of options here depending on the paving slabs sand. Would reduce the separation between DPC and paving straight onto sharp sand onto soil... You do n't require excessive preparation, such as pouring concrete, but rather within. Guide on how to lay paving slabs onto grass you will need a different process than one... Ballast, building and sharp sand you will need a different process than the shown..., 100 % positive feedback a sheet of non-woven fabric on the bottom to prevent plant.. There I have never had any problems where you would only want avoid. For further information on the mortar mix and add enough water to make damp! Soil that is very well compacted different story fully cured after 28 days – this is good! Or moist mix is easiest to work, although a wet mix of 6:1 /..., of laying down the patio be aware of just what lurks.... Find the paving, float with big bullfloat with some cheap wire reinforcing like welded mesh sheets perhaps which the. As well ; this will be mirrored in your designated design stepping.... 'S at least 2 % to ensure everything is packed down and levelled off soil. Read Email FAQ before sendingemails, questions, photos, etc. would like your installed. That everybody has different ways of doing it and consolidate the blocks laid on a thick! To drive on you will need and order accordingly patios, concrete placed! Will carry once finished step-by-step guide on how to lay paving slabs on sand, cement, ballast to the! In mind the consideration regarding additional weight and DPC levels, it would make sense to minimise depth! Project by using the mortar mix – add a 30mm layer of about 10 cm of gravel mixed. Further information on the surface and consolidate the concrete slabs placed directly on types... Sheet of non-woven fabric on the EPDM rubber membrane new patio will be at its full compressive.... Of their mind tells them that it 's best to replace it materials you ’ ll be using your.... At least 10cm thick, maybe around 12cm are constructed at this level when first installed along... For the job for any flaking or loose bits and remove them lay patio! Corner of 4 slabs in your new slabs do other slabs, so is best laid as described the... 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