storm windows vs. replacement windows

Storm windows don’t just protect primary windows from storm damage; they may also cut down energy losses and reduce air leaking.

Energy savings

Storm windows don’t add much to the insulating value of good and modern windows with energy-efficient glasses. They only are interesting for homes with old and inefficient windows with air leaking problems, in colder climates.

Storm windows – namely interior ones – are particularly suited in old homes and in apartments and historic homes, to improve energy-efficiency and get energy savings without big investments or without altering the home’s appearance.

See also:
Weatherstripping and air leaking windows basics
New efficient windows

When not to use storm windows

Storm windows is a cheap solution for homes with old and inefficient windows, in cold climates. In other cases, and if you aren’t on a tight budget, new replacement energy-efficient windows with good frames and energy-efficient glass are a better option.

Some types of interior storm windows are also a good option for those living in apartments with inefficient windows, whenever the exterior appearance of the building has to be preserved.

See:
Storm Windows Advantages and Disadvantages
Storm Windows Choice and Costs

Types of Storm Windows

Storm windows can be attached to either the interior or the exterior of the old windows, and can involve aluminum, wood and vinyl frames and several features and types of panes. Interior storm windows are often preferable.

See, for details: Wood, Vinyl and Aluminum Storm Windows

Benefits and costs

Storm windows can provide energy savings and lower energy expenses. Accessorily they may also decrease window condensation (interior storm windows) or improve sound resistance.

On the other hand, storm windows require some work to maintain (and to install), can be a cause of condensation (exterior windows) and have a limited insulation performance. Replacement new windows are preferable in many cases.

Prices vary greatly with details and the type of storm window.

See: Storm Windows Choice and Cost

Installing

See: Storm Windows Installation