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Michael has presented over 150 property shows for BBC, ITV1, Channel 5, UK TV Style, and Discovery RealTime, including I Own Britain's Best Home; Don't Move Improve; Trading Up; Good Bid, Good Buy; Build, Buy or Restore?; How to Build A House; and Hard Sell. The painting technique for the dry stone wall is slightly different from the rest. To ensure the paint reaches the crevices, spray a fine mist of water, then apply a very weak dark grey wash. Next, apply a slightly watery colour that matches the prototype stone in its un-weathered freshly-cut state. Finally, add additional dark grey washes as necessary, along with dry-brushed yellowy-green ‘lichen’ spots. The first 900-1,200mm layer of clay is subject to movement due to expansion and shrinkage from seasonal variation in moisture content, so it is generally necessary to excavate foundations to a depth where the amount of moisture present remains stable. Electricity and gas don’t usually need to be ducted or installed at this point as they are normally surface mounted. Finally, the building and warranty inspectors will have to approve the excavated foundations prior to any concrete being poured.
Where it is not possible to construct conventional strip footings because the new building is hard up against an existing structure, or access to the adjoining land is not available, it may be possible to use an offset strip foundation rather than a more expensive piled foundation or a reinforced raft foundation. Typically 750mm wide and 450mm deep with a layer of A193 mesh placed in the bottom of the concrete with at least 50mm cover to the steel. The solution is generally suitable for single-storey structures. The capping stones feature a slope either side of a raised and rounded middle point. On a length of styrofoam 7mm wide, mark two parallel lines in the centre 1mm apart. Using a flat file, form slopes on either side.The raised section that’s left canbe rounded off with more light filing. Cut to the lengths required, then glue them onto the parapet using PVA. These are a relatively new foundation solution consisting of slender, hollow steel shafts with a small number of steel helices (or screw threads) welded to them. The piles are screwed into the ground until they achieve sufficient friction to support the required load.Diagrams of strip foundations (left) and trenchfill foundations (Image credit: Homebuilding & Renovating) building is spread evenly. For a post and beam structure, the piles or groups of piles are capped with a concrete pad. Screw Pile Foundations There are three types of clay in the UK, classified by their plasticity, which is how much their volume can change due to their water content. Clays with the highest plasticity (and so the highest risk) are generally found in the South East of England, stretching up through the East Midlands to the Humber in the North and down to Bath in the West
In this practical, I’ll be focusing on a few methods you can use to construct some of these prototypes. For best results, I’ll be using materials suitable for scribing; a harbour wall made from rigid insulation and plaster (with another using DAS air-drying clay), an ashlar arch and various rubble walls made from styrofoam, and finally, a dry stone wall made out of more air-drying clay. Please note; as the painting technique I’ll be using will be similar for every practical, I shall share this at the very end. WHAT YOU NEEDWhere the soil is soft or of a low loadbearing capacity, wide strip foundations can be used to spread the load over a larger area, reinforced with steel so that the loading per square metre is reduced. Short bore piles are typically 2–3m long and can be reinforced with steel (Image credit: Homebuilding & Renovating) Strip, trench fill or pad foundations must be cast at a minimum depth of 750mm in low plasticity clays, 900mm depth in medium, and British Standard 8004 recommends a minimum depth of 1m for foundations in the highest risk areas. If there are, or were, trees nearby, depths of up to 3m may be necessary. The depth necessary will depend on the type of tree, as species have different water demands, with tall broad-leafed species such as poplars having the greatest impact.
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