I am adding new wood storm windows over existing double-hung wood
windows and was wondering if it would be worth using insulating
glass in the storm windows. An energy consultant in Oregon told
me he thought that using insulating glass would actually be less
efficient because circular air currents, within the dead air
space between the double-hung window and the new insulated storm
window unit, would speed up. The increased air currents would in
turn increase heat transfer through the combined window assembly.
Also, I live on a busy street and am wondering what type of
glazing would be best to use in the storm windows to inhibit
noise transfer. I believe it would be 1/4″ laminated glass; the
existing doulbe hungs have 1/8″ single pane divided lites.
Any thoughts? By the way, I live in Seattle