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The plastic bases of these tiles have multiple “feet” which distribute any load evenly over surface below. A geotextile could be laid under tiles as an extra precaution against membrane damage or if building owner required extra assurance, if required.
Some manufacturers produce tiles in a variety of different designs, so it is possible to create borders, centerpieces, feature areas etc. to suit your individual preference.
As well as wood tiles, a select range of ceramic interlocking tiles are also now available which gives much more opportunity for creativity in designing total rooftop landscape. These tiles are designed to interlock precisely to wood tiles, so for example you could have a dining area paved in ceramic tiles where tables and chairs are situated, surrounded by wood tiles. If possible, try to divide area into “rooms” by using a row of tubs with bushy plants, some trellis, modular fencing etc. With addition of some large pots, attractive plants, and maybe a few favorite pieces of sculpture in strategic spots, that forsaken roof top can easily become an attractive and useful relaxing an entertaining area.
Malcolm Kay is the CEO of Intex Pacific Pty. Ltd. an exporter of landscape materials including modular decking tiles. For further information see www.ezydeck.net