It looks like it's at least 10cm thick, maybe around 12cm. Lay 5cm – 8cms of hardcore, using a rake to distribute it and even out any bumps. These paving slab supports are a 15mm high circular plastic disc that supports the corner of 4 slabs in a standard check board pattern. Ballast is a mixture of sharp sand and small stones or gravel, used to make concrete for a variety of landscaping uses – from path edgings and shed bases to kerbs and securing fence posts. 0 0. 5 years ago . Once the cement has set, you can create the mortar mix. This will ensure they’re laid as securely as possible. All paving and surfacing should be at a level that is at least 150mm below that of any DPC or internal floor level (except at doorways and in exceptional circumstances). My landscaper says he will lay the 2"thk 2ft square slabs straight onto sharp sand onto the soil. FAQ - Is a concrete base better than a sub-base beneath block paving? Any unevenness will be mirrored in your new slabs. Is this all i need..Paving Slabs,Course Sand,Cement,Ballast? 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. Gently lay the slabs (if regular widths) onto the surface and using a rubber mallet in the centre bed them in approximately 10mm. Please read Email FAQ before sendingemails, questions, photos, etc. should be removed and either re-laid to be firm and sound, or replaced with cement-bound material (10:1 grit sand with cement or a ST1 lean mix concrete ). Use a rake to distribute the hardcore, evening out any bumps. You will need to mix one part cement with six parts ballast and check the bag for a starting point as to how much water you’ll need. Use a wacker plate to compact and level the hardcore. Is there anything in particular that needs to be considered? 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. 6. 1) Plan your pathway. Paving slabs can make a pathway or driveway look fantastic with just a little bit of hard work. Compact the substrate firmly. Under one of the flags some water got in and there is a bit of a hole now a few cm deep, but that's the only damage I can see. Decisions made, you’ll then need to mark the area using string lines and pegs. lay paving slabs existing wood decking cover. Under one of the flags some water got in and there is a bit of a hole now a few cm deep, but that's the only damage I can see. 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. You’ve finally mastered how to lay a shed base with paving slabs. Sweeping and spraying. 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. The first thing to consider is the condition of the existing paving. 3. Sometimes people put down a lean mix - normally sand and cement with a tiny bit of water and then put the slabs down. Our Privacy Policy / Use of this website and its content implies acceptance and agreement to abide by the Terms & Conditions All information, specification and drawings used on this site are intended for guidance only. and then put a bed of mortar down and lay the slabs on the mortar. Inspiration, keyboard_arrow_left Concrete is fully cured after 28 days – this is when your new patio will be at its full compressive strength. Create the mortar mix – add a 30mm layer Fill the joints with the mortar mix. Just buy some!- many people have some as free to collect! 1. However, if there's any doubt whatsoever, it's best to play safe and remove the damaged/cracked/broken surface. Can You Lay Paver Stones Across an Old Patio?. When you’re laying the slabs, make sure you kneel on the sand rather than on the slabs you’ve already laid – the extra pressure may bed in the slabs too deep and make your patio uneven. What was once a freshly laid asphalt or concrete patio eventually begins to lose its luster through time and weathering. If you are laying paving slabs for a car to drive on you will need a different process than the one shown below. Add a 50mm sub-base layer I would say that the next most important thing to … Step 3: Mortar preparation. The second argument against over-laying is that of levels. Identifying the System, Drainage - Land Drainage for Fields and Gardens, SUDS - Drive and Patio Infiltration Drain, Laying Courses and Bedding Materials for Flags and Slabs, Pavingexpert and SteinTec - Permeable Bedding Mortars, Cutting Flags and Slabs II - Cutting Curves, Cutting Flags and Slabs III - Inboard Cuts, Cutting Flags and Slabs IV - Cutting Notches, Cutting Flags and Slabs V - Cutting a Radius, Cutting Flags and Slabs VIII - Cutting a Ring Radius, Cutting Flags and Slabs VI - Cutting a Fan Radius, Cutting Flags and Slabs - IX - Cutting a Skewed Radius, Cutting Flags and Slabs VII - Run-outs and New Town Corners, Hard Landscape Features - Flag-on-Edge Retainer, Hard Landscape Features - Walls and Brickwork, Hard Landscape Features - Brickwork Basics, Stone Balustrading and Building Regulations, Hard Landscape Features - Building with Sleepers, Recessed Tray Covers for Manholes and Inspection Chambers, Fitting a Recess Tray to a Circular Inspection Chamber, Jointing and Pointing for Stone Paving - Introduction, Jointing and Pointing for Stone Paving - Cement Mortars, Jointing and Pointing for Stone Paving - Hand Pointing, Jointing and Pointing for Stone Paving - Wet Grouting, Jointing and Pointing for Stone Paving - Dry Grouting, Jointing and Pointing for Stone Paving - Slurry Grouting, Jointing and Pointing for Stone Paving - Gun Injection Pointing, Jointing and Pointing for Stone Paving - Poured Proprietary Mortars, Jointing and Pointing for Stone Paving - Resin Jointing Mortars, Jointing and Pointing for Stone Paving - Polymeric Jointing Mortars, Jointex Polymeric Pavement Jointing Mortar, NCC Streetscape Polymeric Jointing Mortars for Patios, Jointing and Pointing for Stone Paving - Resin Slurry Jointing Grouts, NCC Streetscape - VDW 800 Epoxy Jointing Mortars for Pavings, NCC Streetscape - VDW 800 Epoxy Jointing Mortars for Patios, Resin Mortars - VDW 815+ - for narrow joints, NCC Streetscape Resin Jointing Mortars for Paving, Jointing and Pointing for Stone Paving - Pitch Jointing, Jointing and Pointing for Stone Paving - Loose Fill, Pavingexpert and GapFast - Paving Spacers, Repair, alteration and maintenance of paving, Maintenance and Repair - Repairing and Replacing Paving, FAQ: Fixing acid-stained flagstones, setts and other paving, Block Paving Refurbishment - Introduction, Block Paving Refurbishment - Surface Detritus, Block Paving Refurbishment - Oil Stain Removal, Block Paving Refurbishment - Power Wash Cleaning, Block Paving Refurbishment - Remedial Works, Block Paving Refurbishment - Replacing crumbling fillets, Sealant Trials - Dry Treat Stain Proof v2, Sealant Trials - Easy Seal Colour Enhancer, Sealant Trials - Hanafin Concrete Finisha, Sealant Trials - Larsen Impregnating Sealant, Sealant Trials - Lithofin Colour Intensifier, Sealant Trials - Resiblock Indian Stone Sealant (Invisible), British Standards and other approved documents used in Paving, Drainage and Landscaping projects, Secondary Processes in Paving Manufacture, Tools: Saws for paving and hard landscaping, Cowley Stone - See stone paving before you buy, Interlay - The Trade Association for Paving Contractors, Ethan Mason Paving win at RHS Malvern Spring Show. Then you would use a 50mm layer of mortar, followed by the slab which is 65mm. 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. Now you can get down to the placing of the paving slabs, starting at the border of your space, carefully place the slabs in a straight line. Dig a bed that’s 105mm deep You could hire a powered wacker plate to compress the hardcore to give a good solid base. Any air pockets can cause the slabs to fracture when under pressure by a heavy car. Alternatively, you might already have a concrete base in place. How to avoid loose slabs when laying your paving flag stones. 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. Dry lay the flags and then find the paving slabs to match the desired aesthetic. If it is loose, sunken, rutted, weed-ridden, or sub-standard in any way, some remedial work may need to be undertaken before laying the new. We use cookies to help give you the best experience possible. 2.2.2 Bedding and Joint Sand for Pedestrian and Vehicular Applications Indian Sandstone slabs come in a range of sizes and types as do other slabs, so buy the best you can afford. The process all depends on what traffic & weight the paving slabs will carry once finished. Do not step on the paving stones for 24 hours after laying down the patio. You’ll need to ensure there are adequate falls in place to allow surface water to drain off, and the finished surface level should be at least 150mm (two house bricks) below any adjacent damp proof course. Went for a 2″ deep wet mix of 6:1 ballast / cement in the end. 5. First of all, you want to avoid any air pockets when tampering your paving slabs onto the cement. HI as you have said patio, raised beds, and gravel work realey well together. The laying of the paving slabs would not be considered tricky, but the handling and the cutting may be a different story. 5 years ago. Worcester • Member since 17 Jul 2013 • 4 jobs, 100% positive feedback. Check for any flaking or loose bits and remove them. On older properties with concrete or granolithic paths, any cracking or settlement is likely to have stabilised - if there's established vegetation in the cracks and no sign of any recent movement, it may be acceptable to use the path as a substrate for a new, light-use, foot-traffic only pavement. Keep adding the slabs and ensure there’s a gap of about 8 to 10mm between each stone. Many people assume that laying paving slabs on concrete is a difficult task and one that’s better left to the experts. But I would like to ask a question and thats with laying your patio. Lay the slabs onto the ground. This is a simple job of laying out the paving as you want the finished patio to be. Clear the area you’ve chosen for your patio to a depth of 15cm to allow room for the hardcore, mortar and paving slabs. 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. Before you begin. 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. Drainage-Channel - Drainage - Linear Drains, Drainage - Manholes and Inspection Chambers, Drainage - Foul or Storm? Step 2 Compact the hardcore. Ensure you have a root and rubble free compatible sand sub-base of at least 50mm thick. As should be obvious, using thicker pavings, such as a 40mm wet-cast flagstone or a 50mm block paver, would result in an even more drastic reduction in the differential. 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. At Stoneworld we recommend wet mortar is made using mixed soft sand – a 50/50 mix of soft and sharp sand, and cement at a ratio of 5:1 with adequate water to create a firm but wet rather than damp mortar. How to lay paving slabs on grass. It’s important you tamp it down to push the coarse aggregate in the concrete below the surface and consolidate the concrete. Block paving is best laid on 30-35mm of grit sand, as described in the Block Paving section . It's paving, Grim(sby), but not as we know it! 1) A slab support can be used underneath the concrete slabs placed directly on the EPDM rubber membrane. Press down firmly to around 15 mm into the sand. Lay the Indian Stone Paving slabs on a full mortar bed, which should support the whole slab, and not just the corners. Lv 4. 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. The concrete should be of a consistency that means it can be poured thickly – if it’s crumbly then it’s too dry and if it’s runny it means it’s too wet. Bedding Methods. Overall, the best practice is to *always* replace loose, flexible, or unbound bedding. 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. You should remove all old paving and sand and reinforce hard-core with TYPE 1 MOT .It also depend on which type of paving you are laying. 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. Whether you’ve chosen marble, sandstone or concrete paving, carefully to lower your first slab into the concrete. Place the first paving slab into place on top of the sand. Now it’s time to start laying paving slabs on your concrete. After hardcore base is compacted its time to lay the paving. 3. Add 30mm of your concrete mix to the site and screed it to ensure everything is packed down and levelled off. However, any such propagated crack is still liable to cause movement or settlement of the new paving. Sweep the surface clean to remove any loose material, litter, soil, etc., and douse with a good weedkiller, if necessary. Only take me a day to float 80 m2! Step 5. Before you begin laying pavers, prepare the ground. Something in the deepest recesses of their mind tells them that it's probably not kosher. Using four parts sand to one part cement and water, create a mortar mix. Any movement joints should be deliberately carried through into the new paving. Pull and mix it using a flat shovel or spade. 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. For this method, a prepared screed bed is required before laying flags/paving stones. Use a spirit level to ensure it’s as flat as possible. Ballast is a mixture of sharp sand and small stones or gravel, used to make concrete for a variety of landscaping uses – from path edgings and shed bases to kerbs and securing fence posts. And as a specialist paving supplier, we’re frequently asked how to lay stepping stones. Ask your stockist to calculate howmuch all-in ballast, building and sharp sand you will need and order accordingly. 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. Your patch is probably waterlogged as there is nowhere for the water to go or soak in. Slab laying is one of those things that everybody has different ways of doing it. If you lay paving on soil with no supporting hard base, it will eventually deform and need replacing. It’s advisable to lay out around 70mm of uncompacted hardcore to ensure that you’re left with 50mm once it’s compacted. Mixed building sand is a standard building sand, used for creating wet mortar for patios. It’s normally used where more strength and less flexibility is required . Paving over existing concrete and type 1. Mix together with just enough water to make it damp and workable, but not overly wet and runny. LAYING THE SLABS. Continue like this until you have put down your last slab. 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. Field. 32, Newchurch Lane Culcheth, Nr. The structural argument against overlaying of segmental paving is based on the reasoning that the 'buried' paving units may move or settle and because they are of a relatively large size, such movement/settlement is likely to cause a problem in the support of the overlying paving. Why not just pour, float with big bullfloat with some cheap wire reinforcing like welded mesh sheets perhaps? Tap each slab against the previous slab you installed and then drop it into place to avoid dragging it through the sand and disrupting your flat surface. Lay the second slab next to it at the same depth. Friday, 5th June 2020, 7:57 am. Always dry lay your patio first, a simple job of laying out the paving as you want the finished patio to be. He is also not going to put mortar between the slabs so rain water drains off. If you use slabs the water will run on the surface hopefully and drain into the garden. Using Wooden Pegs. 4. 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): It is always best practice to be aware of just what lurks beneath. Any loose or rocking segmental paving (flags, blocks, setts, etc.) All of this will determine the size and style of your patio. Yes it is possible to install slabs or tiles on top of an EPDM flat roof. So: if the property owner does decide to ignore all of the previous advice, what sort of construction should be used? Source(s): lay paving slabs existing wood decking 39 cover: 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. What you will need to do then is to fill in the gaps between the paving slabs. Compact this surface as well; this will be the final surface on which you set your slabs. 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. 2. Our Products, keyboard_arrow_left 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. Then Thursday mixing the concrete and laying the slabs. Prime the back of the flags with a cement-based primer The process we have shown below if for constructing a simple patio with concrete paving slabs. That bedding was created for a different paving, the old ones, and it may not be entirely suitable. 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. However, the advice is usually to avoid walking on it for at least 24 to 48 hours to allow it to dry and strengthen and become the beautifully laid patio you’ve put so much effort into. There are various ways you can lay paving slabs. Browse the Simply Paving range to select your materials or, for more advice about laying a paving shed base, just give us a call on 0800 032 6306 or start a live chat. I have used this technique many of time's and I have never had any problems. Lay the paving slabs, leaving 8 to 10mm spaces between them Take care to add just the right amount of water for a firm consistency – it should be damp, but not wet and runny. 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. Lay the paving slabs on a full mortar bed, which should support the whole slab, not just the corners. Put down a 30mm layer of the mix and ensure you have an even, smooth base, ready for your slabs. Laying surface.

can you lay paving slabs on ballast

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