- Climate - If your window faces south, it will be subject to direct sunlight for a lot of the day. This tends to cause the sealed unit to fail more quickly – a south-facing window may last between 10-25 years. This is because the spacer bars will twist as the temperature rises and causes the adhesive holding them together to eventually fail.
- Moisture - Windows in kitchens and bathrooms tend to fail more quickly because they come into contact with moisture more often. For example, if water gets on your windowsill when you shower, the seal around the glass will come loose more quickly if it’s constantly wet.
Swanscombe
Swanscombe is a small town in the Borough of Dartford in Kent, England. It lies east of Dartford and north-west of Gravesend, in the civil parish of Swanscombe and Greenhithe. At the 2001 UK census, the Swanscombe selecting ward had a population of 6,418. Swanscombe was necessary in the early history of concrete. The initial concrete manufacturing works near Swanscombe were opened at Northfleet by James Parker, around 1792, making "Roman cement" from cement rock brought from the Isle of Sheppey. James Frost opened up a works at Swanscombe in 1825, using chalk from Galley Hill, having patented a brand-new cement called British Cement. The Swanscombe plant was consequently gotten by John Bazley White & Co, which came to be the biggest element of Blue Circle Industries when it formed in 1900. It lastly shut down in 1990. In between 1840 and 1930 it was the largest concrete plant in Britain. By 1882 numerous concrete producers were running throughout the north Kent region, yet the resulting dirt air pollution drove the people of Swanscombe to take legal action against the regional concrete jobs. Despite numerous technological innovations, the trouble persisted right into the 1950s, with telegraph lines over an inch thick in white dirt. Modern concrete kilns in Kent making use of smokeshafts 170 m (550 feet) in elevation are now stated to be the cleanest on the planet. However, the adjoining Medway towns are reported to be the most contaminated lived in area in the UK, and the cement market adds to acid rain in Scandinavia.