Esiste un ’infinita varietà di pietre con cui pavimentare i percorsi all ’aperto:ogni egione ha le sue occe tipiche e tutte,più o meno,possono essere usate per lastricare viali e sentieri.La decisione migliore è quindi affidarsi alle usanze del luogo dove si intende inte venire,preferendo pietre locali o che comunque si abbinino per colore o trama ai materiali degli edifici esistenti o ad altri elementi già presenti in giardino.In generale,le pietre più utilizzate sono il trave tino,l ’ardesia,il granito,la quarzite e la beola. La prima è una pietra calcarea,dal bellissimo aspetto ma piuttosto porosa e delicata,non adatta,quindi, a climi rigidi o umidi.L ’ardesia ha uno splendido colore nero,con st iature dal ve de al blu,ancora più scuro se viene lucidata.La sua struttura lamellare la ende perfetta per lo spacco in lastre.Il granito ha una superficie a “grana ”di grande pregio,con una durezza e una compattezza che lo endono inattaccabili dagli agenti atmosferici.La gamma cromatica è molto vasta,con sfumature sempre diverse.La quarzite è una pietra a sfaldo come la beola,quindi con una st uttura lamellare,ideale per lo spacco in lastre.La quarzite è disponibile in molti colori mente la beola spicca per le sue intense tonalità g igie. Qualunque sia la scelta,la pietra è sempre e da sempre la egina dei materiali,preferita per gli este ni perché la più naturale e che meglio si armonizza nel contesto del ve de.In più,una volta messa a dimora,è praticamente inamovibile.La sua versatilità cromatica e compositiva consente di creare effetti estetici sorprendenti,grazie alle diverse sfumature,dimensioni,finiture superficiali,venature e tipi di lavorazioni. There is an infinite variety of stone that can be used for outdoor paving.Every region has its local stone,which to a greater or lesser extent can be used for paving paths and driveways.Your best bet is to respect local custom and opt for stone of local provenance;alternatively use stone that matches the colour and surface texture of the materials on existing buildings or elements already present in the garden.Generally speaking, the most commonly used stone is travertine, slate,granite,quartzite,and gneiss.The first is a calcareous stone,nice to look at but somewhat porous and delicate,hence not suitable for harsh or wet climates.Slate has a marvellous black colour with green and blue streaks.Granite has a much sought-after ‘grainy’surface with a hardness and compactness that makes it totally resistant to atmospheric agents.Quartzite,like gneiss,is an impermeable stone with a lamellar structure,so it is ideal for slabbing.No matter what your choice may be,stone is and will always be the king of all materials.It is preferred for outdoors because it is the most natural of materials and is the one that best fits into a green area.
Water drainage Rainwater can easily be drained away with a slope along the path and a series of side drains. Three simple examples are shown left.The first has a central drain with grille that connects to the public drains,the second uses external drains, and the third drains water directly onto the lawn. Il porfido Porphyry Lungo sentieri o accanto ai corsi d acqua i ciottoli sono un alternativa alla classica pietra. Sono fissati su uno strato di malta cementizia che li rende stabili. Along paths or near streams,cobbles can be used instead of the more traditional stone.They are laid on a mortar base that makes them stable. A sinistra una pavimentazione in lastr Left,sandstone slab paving with a high percentage of quartz.The same stone can be cut into cubes or bricks,and it comes in three different colours:Moon Grey,Golden Yellow, and Etruscan Red.Sercecchi. Below left,paving for an entrance drive.The laying of the stones is done by placing them on a base of very fine gravel and then filling the spaces with earth mixed with seeds to create a lawn effect.EcoPietra. Right,Pietra Serena gives life to surfaces of rustic elegance.It has a structurally uniform and very resistant structure in fine porcelain stoneware.It is available in three different sizes and in the colours of Ink Black,Natural Grey,Quartz Green,Desert Beige,and Ice White.Floor Gres,La Pietra di Langa and Pietra Alpina,thanks to their strength,are perfectly suited to paving large throughways,from pavements with the stones placed on edge,to paved paths with the blocks placed in contrasting arches,and from the randomly laid natural stone to the most elaborate mosaics. A.L.P.
An ally against the weather Stone materials are continuously exposed to polluting atmospheric agents and acid rain. As a result, with time, there is a need to remove these substances with a good detergent and scale-remover such as ‘PK 709 TF’ by La Nuova Chimica Ossolana. After cleaning it is important to protect the stone with a water-repellent. The same company also makes acid detergents for cement paving,antistain solutions,waxes for terracotta and clinker surfaces, anti-graffiti products, and reinforcement products against materials that have worn away.
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