42. Does it really matter if I use the same old type of weather strip?

It most definitely matters - using original style parts, properly designed weatherstrips, correct kerf type seals, bulb seals, foam seals, pile seals can make all the difference in the world when it comes to restoration projects and eliminates the chance of early seal failures. Choosing the right weatherstripping products for your specific brand and type of windows and doors will provide weather seals and weather strips for proper installations, air-tight sealing, prevent issues such as as out of tolerance and gaps, and many other issues.