Windows in some high-rise buildings , Hugh Naylor reports in The National. If contractors incorrectly fit a window pane, it is susceptible to temperature fluctuations that cause the frame to contract and expand. This can put pressure on the glass. Consultants say that there are insufficient building regulations for window installations. <b>Essdar Capital</b> 's bid to buy bonds related to the troubled <b>Blue City</b> property development in Oman , a top executive says. , Angela Giuffrida reports in The National. The number of transactions increased by 50 per cent compared to the quarter before. Prices fell 9 per cent between April and June, compared to a 42 per cent decline in the first quarter, according to <b>Colliers International</b> .