In our house we have regular single-hung windows which are leaking cold air.
As usual, the double pane unit is encased in plastic trim. I can feel a draft coming out where the plastic has a seam with the glass. There is a bead of rubber going all along the seam, and it doesn't looked peeled off.
- Is this a common problem? Could I be imagining a leak in this spot?
- How do I fix it? Is applying a bead of silicone over the rubber seal a bad idea?
The arrows point to where the seam is: