Hey Sally, This is from the ‘Thermal Mass in Summer’ section from our website, "With correct eave overhang on the North of your building & thermal mass being shielded from direct solar gain we can control the increase in the ambient air temperature of the building. During the day heat gains from external temperature, the occupants of the building, and any electrical lighting and equipment, is absorbed by the exposed thermal mass of the building and releases stored cool within the thermal mass, thus limiting the temperature rise within the space to be within acceptable levels for human thermal comfort. By the end of the day the thermal mass of the building has in turn warmed up, and now as external temperatures reduce the heat can be released and the thermal mass cooled down ready for the start of the next day. However this "regeneration" process is only effective if the building is ventilated at night when the external air temperature has dropped below the internal temperature, to carry away the heat that has been absorbed during the day. This can be achieved through naturally ventilating buildings (opening windows etc.) or the use of automated ventilation systems. This reduces or totally eliminates the need for artificial cooling systems to be installed, thus reducing the overall energy consumption of the building to attain a comfortable living environment." When temperatures do not drop at night for 3-4 nights, our houses are still far more comfortable than outside, warmer than it would be if night ventilation could be achieved, but still a comfortable temperature. In our house we just use ceiling fans during those in-between days! We find that even when it is warmer in our houses in prolonged hot periods than it would be with air-conditioning, the quality of the air and feel of being inside the house is much nicer than what it would be with the everyday use of an air-conditioner – not to mention benefit that not using air-conditioning has on the environment. Hope this answers your question :)

Ask your family what they would like to see, not designwise, but plant materialwise - color, texture, fragrance. Even ask your mother-in-law. You have provided some architect's dream, with the bold geometric forms, the bold palms and cycads. How about something warm and fuzzy. Something to rub your hands on as you head to the door. Some color and fragrance beyond the white and palm trunks. How about vines to soften the hard edges of the planters, fill them with ground cover plants so you won't see the mulch in a couple years, add bulbs of all seasons to bring cheer, glossy leaves to brighten your day. Bring nature to your entrance area to warm up the arrival of your mother-in-law. How about saving room for a couple chairs and small table, to sit out and prove that people actually live in this piece of marvelous sculpture, and add the warmth of an outdoor room. Spend some time at the library with books about the architecture of Frank Lloyd Wright. He is the one who introduced the architectural design idea of the outdoor room. Come to think of it, I don't remember ever seeing a garage door in any of the photos. Guess I'll have to take another look.

Hi Roger, With the pleached trees, I think your underplanting amps up the tropical look especially if you go with a magnolia that have the dark green upper leave and the bronze underside. You could just go for banana or palms - personally I think you might be right about the clumping bamboo becoming a bit dense. Regarding your 400mm retaining wall - citrus are shallow rooted and tend to have a root system that goes out to their drip line. Maybe if you put it in a corner you can use the corner to espalier it in conjunction with staking it to get upper stablility but I'm not sure how it'd go with the roots - but give it a go at $30-50 depending upon size it's not an huge amount if it doesn't do well - just dig it up (just watch the thorns) and give it to a friend - check out Daileys for varieties and maybe get in touch and see what they think, they might do them on a dwarf root stock - I've found them to be helpful in the past. i'd be reluctant to underplant any kind of citrus though - as they are shallow feeders.

Clau2000 our manufacturer was in Melbourne, supplier in Canberra. Despite being happy with the product we really struggled with the level of service from the supplier. Quite frankly the business owner was rude, uncommunicative and very difficult to deal with and I would hesitate to recommend her business to anyone. At one point we contacted the manufacturer but he insisted we had to go through his ACT supplier and could not order directly from him (either us or our builder). Our first set of windows were installed on a westerly facing wall & get direct sunlight for the hottest part of the summer afternoon, they have been installed for 4 years and are showing no sign of deterioration. We went with E10 glass, double glazed and they do an amazing job of blocking the summer heat.