While visiting some friends in D.C. this week I was reminded of one of the big tasks in front of me: restoring the 16 original windows in Chez Melendy. My friends have a house built around 1918 and their original windows are doing little to keep out the cold air in winter time. For many people, simply updating their windows with energy efficient replacements would be the answer. But restoring old windows so that they're tighter and eliminate all the air infiltration that's plaguing them is an option that has more soul.
Aside from a house's basic shape, there is probably no other single aspect that defines its character as much as its windows. The windows are like the eyes of the house, looking out to all looking in. I've seen enough charming old houses with the vacant stares of modern window replacements, complete with faux muntins sandwiched between double panes, to tell me there must be a better way. I'll admit that where I replaced a single double-hung window with a large "picture" window, I used a typical new energy efficient model. I justify it by saying (1) it's installed in the ell so it's technically not part of the original house, and (2) I wouldn't have been able to afford the design change if I installed a completely historically accurate window. Where I can maintain originality, however, I will.
Of course that's easier said than done. Although there are basic steps towards improving the energy efficiency of old windows, each situation presents a particular set of problems.
For windows that are no longer structurally sound, that is the wood or metal is rotted in the sashes or sills, the task is large. If historic preservation doesn't rate high on your list, then replacing decrepit windows makes sense. However, if maintaining the historic character of your old house is important, than you should know that even the most dilapidated windows can be rebuilt, and with probably less effort than you might guess. A good resource for working on old windows is Repairing Old and Historic Windows: A Manual for Architects and Homeowners by the New York Landmarks Conservancy.
But if the windows and their casings are sound, and the
issue is mainly their leakiness or rattling, then there are several things you can do to improve them without breaking your back or the bank. The first to consider is weatherstripping, of which there are several kinds. The most popular and easiest to install are self-adhesive foam strips and V-shaped strips. Self-adhesive foam strips can be added to the bottom of your double-hung sash to help seal where it meets the sill. If you have casement windows, foam strips can be installed in the frame stops. V-shaped strips added to the channels where your double-hung windows ride up and down tighten the vertical spaces where air can leak in. Weatherstripping also comes in the form of thin spring metal or plastic strips, rolled vinyl or rubber gaskets, and extruded rubber and plastic profiles.
Another way to increase the efficiency of old windows is by adding exterior or interior storm windows. Storm window add a lot of R-value to old windows. In the case of exterior storms, they can also provide protection for original glazing. Interior storm windows are an unobtrusive solution for tightening-up an old house. If your house already has exterior storm windows, they may need re-caulking to bring back their efficiency.
Chez Melendy has old exterior storms that need re-caulking and other work. I haven't decided yet whether I'll keep them or remove them and go with interior storms. I'll no doubt have a lot to say about that decision and restoring the old wood windows when I get going on that task down the road. Until then, there's plenty of interior work waiting for me when I get back from my trip.
Handyman
p.s. Check out the following Builders Square animated How-to Tutorials associated with this post:
Applying Permanent Weatherstripping
Applying Temporary Weatherstripping
Exterior Caulking