When stone flags are laid to town centre footpaths and other areas that are open to the general public, the rigid layin… Once on the flat, the flag is nudged into alignment with the maul , and is then tapped down to the correct level with the maul until it is 'flush' with the surface of the preceding flags and/or the string line guide. As with most things in life, there is a right way and a wrong way. It is a partial bed. Using recycled forms or inexpensive 2x4s, create the frame for the patio. Indeed, it's a project that entails many steps, and you'll be challenged to make the right decisions along the way. Remove the tile and begin with a clean and level substrate. … In the long run, this installation method will cut down on loose pavers, potential cracks, and so on.— Make sure the slate has full coverage with thin-set on the back.— Make sure your contractor uses a crack isolation membrane to keep cracks in the slab from transferring to your slate.— A good contractor will lay out the slate exactly as it will look on your project. A bed is prepared, the flag is laid and then the next bed prepared and so on. Make the wrong decision (e.g., in selecting product X over product Y, when shopping) at … The surface needs to be dug off to a depth of approx. Garden patios and terraces have always been popular outdoor spaces. It is essential that the flags be of a constant thickness, hence the small element paving flags, wet-press manufactured patio flags and the smaller calibrated stone flags are the most suitable candidates. As the mortar (or a suitable concrete) cures and harden, it holds the flag fast and prevents lateral movement. If the flag is too low once you've consolidated it with the maul, it will have to be lifted and the bed added to before relaying. For light patios and pathways, the bedding material can be a 10:1 mix, which is adequate for most purposes. Once again, this form of bedding does NOT provide the "full bedding layer" required in BS 7533:4 . This frost resistant tile is suitable for indoor or outdoor walls in residential and commercial installations. Brick edgings, plain or decorative edging kerbs , kerbs or cobbles laid lengthways are all suitable. If you are installing on the patio, pool deck or another ground application, it helps to lay the tiles out, then pick them up one at a time to lay the mortar. Make sure you do not get your fingers trapped between the flag you are laying and the preceding unit. Use this mixture for patio, pool deck, stair or wall installations of the slate. A member in good standing with the National Kitchen and Bath Association, Asaff has working knowledge of all areas of home design. For an eye-catching and modern patio or outdoor area, we recommend the beautiful Paving Superstore Pro Range Slate Rustic Paving Slabs. Make the prepared bed spread 100mm or so further than the flag will cover - it is better to have the bed to big than too small, leaving an edge of the flag unsupported. Low Maintenance Cost-Effective Naturally Riven Surface Texture Stunning Natural Colours See How (further down page). Then, pour the concrete. Where the area of the paving is troubled with weeds, treat the excavated sub-grade with a general weedkiller such as Glyphosate. Keeping one foot against this bottom edge to prevent the flag from slipping backwards, grip the flag on the open side and carefully lower it into position on the bed. 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. This slate is all the way from Brazil, which means it has a more even texture and flatter surface than standard Chinese slate paving. It is recommended to blend tiles from different boxes when installing. Walk the flag into a position where the bottom edge is hanging over the lip edge of the preceding unit, roughly halfway, as shown in the diagram opposite. Also I am thinking of an equal building sand to sharp sand mix 50/50 and adding this to the cement to … The Experts at Homebase show you how to lay a patio in this step by step guide on laying patio slabs. Adjust the amount of mortar you place beneath each stone based on the thickness of the slate. Whilst obviously more efficient than the individual bedding method, this method is only suitable for the smaller flags, generally those less than 600x600mm, which are small and light enough to be man-handled onto a screeded bed, although it can also be used with some calibrated flagstones . The joints can be topped-up with additional mortar or cementitious material once the flags are aligned and consolidated. Flagstones can be bedded directly onto either: In general, most flagstones are laid onto a cement-bound material (a mortar or concrete). See the Setting Out page for more detail on establishing lines and levels for paving projects. The 'dollops of mortar' method, known as "spot bedding", "dab bedding" or "dot and dab" is not recommended. Use the taut string line as a guide - use a piece of broken flag or a piece of timber cut to the correct thickness to judge the level of the bed adjacent to the line. Walk the flag to be laid into position so that the bottom edge of the flag is aligned to deliver the flag into the correct position. For driveway or other heavy use, the sub-base layer is the load bearing layer, and should be at least 100mm thick, minimum. When using this method, it is advisable to use small pieces of plywood or other temporary spacing material between the flags to maintain regular 8-10mm wide joints. Use a spirit level to check that the flag is falling in the required direction for drainage. roofing nails). This will create the sub-base layer that … level, with the existing ground. With the Open Joint method, the flags are laid without any buttering mortar prior to their being filled with a mortar , slurry or wet resin jointing material on completion of the actual laying. Most slates are sold ungauged, which means they are only roughly sorted for size and thickness. Certain pale or light-coloured flagstones have been found to become discoloured when laid onto, or jointed with, a standard mortar. With its 20 mm material thickness, it is ideal for installation on gravel and sand. For dry-sand joints, the flags should be separated by no more than 5mm. A stronger mix (6:1) may be used when working in wet areas, or where the movement of ground water could lead to bed migration, and we find it useful beneath the thinner patio flags as it gives the finished pavement a bit more solidity. Check with your stone supplier to find out if your desired stone is suitable for an outside space. Sometimes called flags, flagstones or slabs, patio paving stones are flat, square or rectangular, hand-cut, natural sandstone, limestone, slate and travertine. Travertine. 10-12 m² per tonne at 50mm thick, but this varies with moisture content. hi. Slate tiles are made from natural material and add an earthy look to a patio. Don't worry about how it looks as it won't … Slate can not be installed on dirt, grass or sand. This will allow you to control just where the extra thickness goes, so tiles with thin areas can be built up. The plywood should be at least ½-inch thick and be exterior grade. Where flags are laid to a free edge, that is, an edge where there is nothing firm or solid against that edge, as is the case with a garden path and some patios, the edge flags are often best bedded onto a wettish mortar in order that they are held firmly in place. Slate tiles differ slightly from other stone tile installations in that they require a wet-mortar bed made of a mixture of Portland cement and sand, rather than standard thinset mortars. The flags should be laid to a taut string line, to aid coursing and levelling accuracy. (adsbygoogle = window.adsbygoogle || []).push({}); This method relies on each flag having a bed prepared for it individually. 50-150mm. Slate tiles are often not even in thickness; play around with placing thin tiles next to thin tiles and thick tiles next to thick tiles. See Screeding page or the Aggregates page for more details on grit sands. The bed should be 5-8mm high to allow for consolidation. Alternatively, the flags can be laid directly onto a mass concrete sub-base , but be prepared to work fast to cover the ground before the concrete sets! The last few years have seen a shift in the quality of tiles – from ultra-realistic stone and wood effect to huge slim porcelain panels. More information on this mortar can be found on the Light Coloured Paving page. Sarabeth Asaff has worked in and has written about the home improvement industry since 1995. Laying porcelain paving is slightly different to laying natural stone paving. The grout will now release from the tiles easier. Lay the tiles right where you plan to install them without any mortar. It's paving, Grim(sby), but not as we know it! The depth of dig can be calculated as... (average depth of flagstones + 25-40mm bed + any sub-base required). Wendy, a lot of the slate that ended up using for the walkway was recycled from our back yard’s old patio (it was pretty thick, and only one slab broke after repeated dropping). Considered a form … There is only one remedy, the flag will have to be lifted and re-bedded, but before you do lift the flag, make a mental note of where the flag is high and by approximately how much, then, when you've lifted the flag and stacked it safely while you adjust the bed, you can use a spade or a trowel to reduce the bed in the necessary areas. Bear in mind that heavily riven paving may require additional fall to prevent water accumulating on the surface, which can lead to discolouration, while smooth ground paving can often cope with a shallower fall (say 1:80), See the Drainage for Pavements page for a fuller explanation of these terms. When looking for a versatile and affordable stone to lay on your concrete patio, brick is a good choice. The next flag to be laid is then offered to the receiving edges, squeezing against the mortar that has been buttered thereon. Make sure this mortar is the consistency of crumbly, dry peanut butter, and push it between the joints with a float from several angles to ensure good coverage. This is where the tile sits … Installing a slate floor outdoors means that the mortar will need to be able to handle temperature changes. If the area to be paved is such that it requires raising or elevating to a higher level, then the uplift should be constructed by including or adding to the sub-base layer, not by increasing the thickness of the bedding layer. This means extra strain on your back, so extra care must be taken. British Standard 7533: Part 4 , which covers the installation of both concrete and natural stone flags or slabs, requires that these are laid on a "full bedding layer". Simply lifting one edge of the flag and packing bedding material in as far as your fingers will reach is not a good idea - it can leave a void in the centre of the flag, meaning the flag is only supported on the packed edge and the opposite edge. Tiles that are too thick or thin or that are thick on one edge and thin on the other can be used as cut tiles on the perimeter. Direct installation on gravel and sand. There are two acceptable methods of laying flags - individual bedded and screed bedded. This is NEVER a good idea as any movement of the flags can result in spalling of the surface. If the flag is rocking when you straddle corners A and C, then areas B and/or D must be high - tap them down until the rocking stops. A number of jointing options were briefly introduced above and such is the range of alternatives that a whole separate series of pages has been created to consider each in turn. Too dry and it may not cure properly in the sun outdoors. The two most common faults we encounter are lost bedding, because the voids left between the mortar spots provide a channel into which surface/ground water can enter and wash-out the bedding and/or sub-grade material, and excessive breakages because the flags are not evenly supported across their entire base. This method is more commonly used with larger flags, where handling and manoeuvrability is a major concern, with natural stone flags, where there can be significant difference in flag thickness between adjacent units, and for many of the mould cast riven or decorative flags, which tend to have a variable thickness ranging ±15mm on individual units - this being a result of the mould not being perfectly level when the wet-cast concrete is allowed to set. May 23, 2012 - Laying an outdoor slate tile patio, walkway or other outdoor area isn't a complicated job. The choice of laying methods depends on the personal preference of the contractor/specifier, the type of bedding that is chosen, and the types of flags being used. One technique we use to avoid excessive strain on the back, is to use the pavior's maul to take the bending motion out of lowering the flag. Sketch out the project on graph paper first to minimize cuts, stagger the joints, and estimate how much amterial you'll… Brick stones are extremely durable and you can paint them to match nearly any outdoor decor. 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. The choice of laying methods depends on the personal preference of the contractor/specifier, the type of bedding that is chosen, and the types of flags being used. See sub-base page for details of acceptable materials and compaction methods. Grout the tiles by packing the same mortar used to install them between the joints. Excavate any soft spots and fill with compacted sub-base material or a 10:1 grit sand/cement mix. MSI Golden White 22 in. Hopefully, it's right this time. Use a spade or large trowel to level out the bedding material, which should have the top 15-25mm loosened to allow the flag to be bedded down - this is usually acheived by 'rippling' the bedding surface, creating small troughs and peaks with the blade of a trowel. Laying Out Tiles Sketch a layout for the color scheme of the slate. GapFast Paving Spacers are specifically manufactured for this task - read more here. $23.99 $ 23. On private patio and driveway projects, a fall of approximately 1:60 is usually adequate. Laying Tile Outside. There are exceptions, such as when proprietary drainage systems are incorporated into the pavement. Check out our range of branded slate paving slabs at competitive prices.. 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