Why is it that your windows can look perfectly clean - until it rains? Suddenly, your windows are spotted and streaked. Is the rain to blame? Not at all. Unlike water from a garden hose, which often contains minerals, rainwater is naturally soft and pure. There is nothing in it that can dirty your glass.

Understanding how many window panes your home has is crucial to giving you an accurate price. Each pane of glass, regardless of its size...