Rotting pella windows
I have 12 year old house, with all Pella windows. They are aluminum clad on the outside and wood on the inside. Last year the sliding glass door had a bunch of rot on the bottom rail. The seal between the glass and the rail had failed, allowing water to get between the cladding and the wood. Last week, I was cleaning a window and the entire bottom rail came off. It was completely rotted under the aluminum. It looks like the seal had failed, just like the slider.
Is this a common problem with Pella windows? The frame of the window is fine. Can I replace the window itself? It is a double hung window. I can't find the unit number or the serial number of the window.
Thanks for your help.