I have a basement door that is about 2 inches off the ground and in
the winter I can feel the cold air coming in from the basement. I
bought one of those pads that hook under the door but the gap is too
large to create a decent seal so I'm thinking about extending the
door. Is it as easy as cutting a piece to fit and screwing it on? Is
there a way to do it so it looks somewhat invisible? I'm also worried
about the seasonal swelling. How much space should I leave?