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I have Series 200 Anderson tilt double hung windows that are 5 years old and leak. During driving rains the water comes up through the seal where the two windows lock. (in each corner) Then runs down the sides onto my hardwood floors. Naturally Anderson wants to bank my problem on faulty installation. So i'll go through their check shortly (diagonal measuring) to rule out an installation screw-up. Has anyone ever had this problem with this series windows? Anderson claims that they haven't heard of this problem. So far 2 of my homes 27 windows I found leak. The other 20 windows would leak onto carpet, will now inspect closer.