How long is weather strip performance good for?

Know Your Weatherstripping and it's limitations. The window and door weatherstripping seals the gaps around doors and windows and can make your home feel warmer in winter and save you 10 to 15 percent on your energy bills. But with so many different types of weather strip choosing the right one for a particular job can feel like a guessing game. You need to replace with OEM ( original equipment products ) material and profiles from a recognized source like www.WeFixItUSA.com 

Be aware that weatherstrip will develop a "built-in" memory and become very inneffective. Also breaks down from age and ultra-violet light.