Windows on Washington wrote:
We remove them as well.
I just spoke to a Simonton rep a few hours ago and he said that the pull frame method is actually not approved by the name of the group that oversees window manufacturers. The only two approved methods which is what Simonton recommends is to do a complete tear out, or jump the existing frame. He did add however that some installers are comfortable with the pull frame method and do a good job, but it is not an approved method and therefore leakage would not be warranted by Simonton.
So I guess I don't have much choice but to go with the guy that jumps the frame.