I went to shut the door to the apartment over our garage today and the bottom weather strip got caught between the sill and bottom of the door. This is a steel clad wooden door and the bottom rail had rotted out letting the weather strip fall free. This surprises me because the door is only 4 years old.
It doesn't look like the door was leaking into the room because the carpet and underlayment are dry and the ceiling in the garage shows no sign of water damage. I'll take the door out tomorrow and replace it, but I don't want it to happen again. The weather strip was a piece of hard plastic stapled to the bottom of the door. Five thin strips of rubber were attached to the plastic and they are what actually provided the seal. It appears that water infiltrated between the plastic and the bottom of the door. How do you seal this area? Is there anything else I should look at while I have the door jam out?