What's the noun for winterproofing? Here's the word you're looking for.
winter
Traditionally the fourth of the four seasons, typically regarded as being from December 23 to March 20 in continental regions of the Northern Hemisphere or the months of June, July and August in the Southern Hemisphere. It is the time when the sun is lowest in the sky, resulting in short days, and the time of year with the lowest atmospheric temperatures for the region.
(figuratively, poetic) The period of decay, old age, death, or the like.
“A hundred years ago, our grandparents and great-grandparents would prepare for the winter. Whether there was snow or not, there was always a winter, a time when survival was dependent on their skills.”
“The jetty in its unfinished condition has been exposed to the winter and spring storms.”
“It finds Jane Ford, the last sister of three, at the winter of her life.”
winterization
The process in which solid fats are removed from liquid edible oils by cooling, which allows such oils to be stored in a refrigerator.
The act of preparing something for winter weather.