Pile Weatherstripping
Hello,
Wool pile generally slides into a channel in the sash frame as shown in the videos below. We do not recommend using adhesive since it will be difficult to replace them in the future. Take a look at our selection here and let us know if you have any other questions.
Could you show us photos of the original wool pile and where it is coming out? The backing is normally encased in the sash, so It's tough to determine what the problem is without seeing photos. If it is coming out, my best guess is that the backing that holds it in the sash may be damaged.
If the seal is not staying in place and the sash frame is undamaged, it does sound like there is a problem with the base of the seal. You'll need to remove your wool pile to confirm that is the case and, if so, we'll need you to write out the exact backing width and pile height to compare to our inventory.