There’s nothing that says “welcome” like a beautiful, well-maintained front entry. But the door or doors that separate your home from the rest of the world should do more than simply add curb appeal.

Q. My old wood front door leaks air and requires maintenance. I might switch to a steel door for low maintenance and security, but I was concerned about its efficiency. Doesn't steel transmit heat? A.

Q: My wooden front door leaks air and requires maintenance. I might switch to a steel door for low maintenance and security, but I am concerned about its efficiency. Doesn't steel transmit heat? A: ...