I'm doing a phd in chemistry http://teerandaz.com/omnimentalhealthcom-131c.pdf alcoholendrugscoach.be  When we bought our Twenties house, we embarked on a programme of improvements and renovations which, I hoped, would include replacing all the rusty, draughty old metal-framed windows. However, having done the windows in the children’s bedrooms, we ran out of money, as one does. While the walls of our house have a U-value of 0.3 (the lower the better), the old windows, with a U-value of 6, allow heat to escape at a terrifying rate. Last year’s prolonged winter nearly killed us, and with my husband threatening to leave if the house isn’t warmer this year, I have been testing a wide range of window coverings, balancing out the triple requirements of value for money, aesthetics and draught exclusion.