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. Mixed building sand is a standard building sand, used for creating wet mortar for patios. Place your timber across the entire course and strike with a mallet to ensure they are in line with each other. 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. How to avoid loose slabs when laying your paving flag stones. Decisions made, you’ll then need to mark the area using string lines and pegs. Even if the pre-existing bedding seems sound, it may not be adequate to support and distribute all that extra weight. Mix the concrete – one part cement to six parts ballast 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. Example all natural sandstone should be laid on a full cement bed. Sometimes people put down a lean mix - normally sand and cement with a tiny bit of water and then put the slabs down. Add 30mm of your concrete mix to the site and screed it to ensure everything is packed down and levelled off. 3. That bedding was created for a different paving, the old ones, and it may not be entirely suitable. Overall, the best practice is to *always* replace loose, flexible, or unbound bedding. CarpetStones ™ and similar products should be laid on a 20-25mm thick bed of the 10:1 bedding mix. 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. how to lay the paving slabs We recommend slabs be laid on a full bed of wet mortar as this enables you to adjust individual slabs allowing for any variations in thickness. If the existing paving is poorly laid, or has been laid on unacceptable spot-bedding , the permanent imposition of an additional 60-200kg per square metre (depends on paving/bedding type and thickness) may be sufficient to cause movement, settlement or collapse of the whole pavement. Yes it is possible to install slabs or tiles on top of an EPDM flat roof. Pull and mix it using a flat shovel or spade. 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. 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. Remove and give away or break up into more easily handled pieces with Mr S. Hammer. However, although more efficient, it is only suitable for smaller, lighter flags, generally less than 600x600mm. 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. As mentioned on the All about DPCs page, breaching the 150mm rule won't result in a prison sentence, but it can and does adversely affect property valuations, and there is a strong possibility that any insurance claim for damp arising from installation of a pavement to incorrect levels would be rejected. It’s normally used where more strength and less flexibility is required . Whether you’ve chosen marble, sandstone or concrete paving, carefully to lower your first slab into the concrete. 7. Preparing and laying a 12ft x 12ft shed base with paving slabs. No professional contractor would lay new paving over the top of existing paving, unless there were extenuating circumstances. The surface needs to have no holes, or areas that can take on water, and can not be loose, or the pavers will move over time. You could always run a gully along the bottom edge for the water to collect, even better if you can connect into an … If you use slabs the water will run on the surface hopefully and drain into the garden. 1) Plan your pathway. Put the finishing touches to your project by using the mortar mix to fill in the spaces between the slabs. Dry lay the flags and then find the paving slabs to match the desired aesthetic. But I would like to ask a question and thats with laying your patio. Laying Paving slabs may seem simple but can prove hard in the best of times. Fill the gaps between the slabs with the mix and use a brick jointing tool to pack it in and create a nice smooth finish. 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): Lv 4. Lay the second slab next to it at the same depth. 1) A slab support can be used underneath the concrete slabs placed directly on the EPDM rubber membrane. Use a wacker plate to compact and level the hardcore. 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. Check for any flaking or loose bits and remove them. It’s a good idea to wear knee pads and gloves for this to avoid potential burns from the wet cement. Step 3: Mortar preparation. 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. This prevents water pooling in any unintentional dips and troughs. To create the mortar mix, use 6 parts sharp sand to 1 part cement and mix together with just enough water to make it damp and workable, but not overly wet and runny. By Alex Nelson. The pedestals can extend as high as 0.6 m. Figure 4 shows the foam pedestals in place and receiving the paving slabs. 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 slabs onto the ground. Take care to add just the right amount of water for a firm consistency – it should be damp, but not wet and runny. To lay a solid base for your paving slabs, you first need a layer of hardcore to a depth of about 50mm to 80mm over the area of your patio. Continue like this until you have put down your last slab. Whether you’ve chosen marble, sandstone or concrete paving, carefully to lower your first slab into the concrete. 32, Newchurch Lane Culcheth, Nr. Something in the deepest recesses of their mind tells them that it's probably not kosher. 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. It looks like it's at least 10cm thick, maybe around 12cm. Check that the centre of your site is level with the edges and isn’t rising up or dipping down. Before you begin laying pavers, prepare the ground. 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. 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. The process all depends on what traffic & weight the paving slabs will carry once finished. Continue like this until you have put down your last slab. In this article we want to outline all the steps involved in laying paving slabs or flags on a screeded bed. This is a popular enquiry from the DIY readership of the Pavingexpert website. However, rigid block paving can be bedded onto 15-20mm of Class II mortar. This ensures there are no gaps left and water cannot enter and cause damage later on. All of this will determine the size and style of your patio. Many people want to know if they can lay the paving directly on to soil. So: if the property owner does decide to ignore all of the previous advice, what sort of construction should be used? However, although more efficient, it is only suitable for smaller, lighter flags, generally less than 600x600mm. It looks like it's at least 10cm thick, maybe around 12cm. 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. Compact this surface as well; this will be the final surface on which you set your slabs. 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. s.bury, Nov 26, 2008 #4. jimmy_joe90 New Member. Lay the paving slabs, leaving 8 to10mm spaces between them The sub-base should be roughly levelled and damped down before tamping down firmly with a hand or mechanical compactor. Paving over existing concrete and type 1. You must ensure that there is contact with the whole of the back of the slab and the mortar. 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. With rigid/bound bedding (mortar or concrete) it is highly unlikely that the old bed will perfectly accommodate the new paving, so it should be removed prior to laying new. This is not a guide on how to lay paving slabs on sand, because long story short, you shouldn't! Keep 15 mm between each slab. Is there anything in particular that needs to be considered? You would only want to lay paving slabs on soil that is very well compacted. 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. This is a bad idea, under the cement which supports the paving there needs to be a hard surface. 5 years ago . Clear the area you’ve chosen for your patio to a depth of 15cm to allow room for the hardcore, mortar and paving slabs. 5. Press down firmly to around 15 mm into the sand. There is still a lot of work to do with this new site, so please bear with me while I get images updated and the new content coralled into the right place. Any unevenness will be mirrored in your new slabs. 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. HI as you have said patio, raised beds, and gravel work realey well together. Step 5. Now it’s time to start laying paving slabs on your concrete. 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. 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. 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. How to lay paving slabs on grass. If you need to resize your paving slabs, then take a look at our step-by-step guide on how to cut paving slabs. Follow our tips for a durable and attractive outdoor space that will give you years of pleasure. Any loose or rocking segmental paving (flags, blocks, setts, etc.) Lay the Indian Stone Paving slabs on a full mortar bed, which should support the whole slab, and not just the corners. 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. Went for a 2″ deep wet mix of 6:1 ballast / cement in the end. If you are laying paving slabs for a car to drive on you will need a different process than the one shown below. We are going to show you the ins and outs, of laying down paving slabs on a sloped surface. Depending on the design of your patio, there will be differing shapes or styles of paving that would vary in difficulty to cut and design. 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Any propagated crack is most likely to emerge in a joint within the new paving, rather than damage any of the new paving units. Many people assume that laying paving slabs on concrete is a difficult task and one that’s better left to the experts. HI as you have said patio, raised beds, and gravel work realey well together. Can new paving be laid over the top of existing paving? Step 3: Laying the slabs. Once the cement has set, you can create the mortar mix. S Jones Landscape Development. If you are laying paving slabs for a car to drive on you will need a different process than the one shown below. Bedding Methods. 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. How to choose the right paving for your garden. 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. A semi-dry or moist mix is easiest to work, although a wet mix can be used if preferred. Water will pass through the gaps in the slabs … But I would like to ask a question and thats with laying your patio. Sweep the surface clean to remove any loose material, litter, soil, etc., and douse with a good weedkiller, if necessary. I've looked at several forum questions and most of you say that this method is NOT good. It's paving, Grim(sby), but not as we know it! A stepping-stone path is a beautiful way to finish any garden or patio area. And as a specialist paving supplier, we’re frequently asked how to lay stepping stones. This will ensure they’re laid as securely as possible. 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.
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