But double hung windows are very hard to seal, the spaces where the counterweights go are big empty wind tunnels.

Air leakage becomes a far bigger problem with them than heat loss through the glass.

updating window weight-13updating window weight-29updating window weight-12

The first thing many people do in a renovation is replace all the windows, even though study after study have shown that it has just about the worst bang for the buck of anything you can do.

It also doesn't even make that much difference; a single paned window has an R value of perhaps 1, a new double glazed window between 2 and 4 unless you go very, very expensive.

Low E coatings, usually applied to the inside layers of insulating glass, manage the amount of light and heat either conducted through a window or reflected away from it. Microscopically thin, transparent metal or metallic oxide layers deposited on a glass surface suppress radiative heat flow and reflect interior infrared energy (heat) back to the inside, reducing heat loss through the glass.

As a committed Tree Hugger, one of the most important goals of my recent house renovation was to reduce energy consumption per person.

They will also last as long as the house; double glazed units will not, as they lose their seal and the argon leaks out, as the vinyl or finger-jointed wood deteriorates.

The salesmen keep pitching the energy savings of replacement windows; It's a huge problem for those of us concerned about preservation and conservation, where replacement windows ruin heritage houses, at great cost to owners and for very little long term gain.

One solution that has been around for a while is the window insert, an acrylic window that fits inside your existing windows, often held in place with snap fittings or magnetic strips.

On older Windows versions, users have full control over Windows Update; they can review descriptions for each update and choose which updates to install. It has advantages, like improved security, but it can also go wrong. Until recently, users didn’t even have access to detailed information about updates.

A window expert like your Marvin dealer can help determine which products will work best for you.