Another factor on replacing the windows rather than repairing them is the matter of the sash weight pockets. These amount to a 2" wide strip down each side of each window for the sash ropes and weights to operate in. This comes out to four inches by four to five feet of uninsulated wall for each window, multiplied by sixteen windows makes about a five-foot square hole in your insulation. These wood windows also had no weatherstripping at all. They were a tighter fit in the frames than some of the windows I have worked on from the early 1900s, but still not tight enough in these days of expensive energy.
Another factor was the lead paint issue. There has been a lot of noise and heat on that subject, but not really much light. Not all houses are equally hazardous in this respect. While using lead compounds in paint was not officially banned until 1978, the paint companies began using other pigments during World War II, because lead was needed for the war effort (my source on this was an old friend who worked as a paint chemist for a regional paint manufacturer). So it is less likely that this house, built around 1950, has as much lead-based paint that would be found on on a home built in the late 1800s or early 1900s. But if there is lead paint, it will be on woodwork and exterior wood, not on plaster or drywall. And the primary risk is not paint chips, which if swallowed will likely pass through undigested, but from paint dust generated by painted wood parts rubbing against each other--a window in its frame or a door that rubs on its jamb. Replacing the windows removes that possible source, if they should have lead-based paint under the later coats accumulated through the years.
|It does not take a lot of tools to handle this job. I think I left my small handsaw out of this picture, but I could get by without it by using the chisel.|
|Once the upper sash is out and put aside with the lower,
remove the rest of the parting strips from the frame[. The last piece
that defines the channels for the sashes is called a "blind stop" and it
is left to hold the new window in place.
|Put the pocket covers back into their places, and the window is removed. Cleaning up any dirt, dust or debris is next, and we are ready for the new window.|