Molliehelb

This is simply because a real window unit is more advanced than old fashioned single panes in plenty of different ways.
We layer walls with siding, brick, plywood, studs, sheetrock; then we finish task with a healthy layer of insulation.

Windows with double glazing allows easy entry of light into area minimizing necessity of lights.
Find out from the average consumer and try to secure the services of the contractor who did the responsibility of them. Rarely will the "cheapest" price be a best which in over time.

Within a high proportion of burglaries, the intruder enters through a window, but double glazed windows are difficult to break into.