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.

Fire walls and fire barriers are inserted into buildings to separate spaces into reasonably-sized fire areas, or because hazards are present. The separations must be continuous or their purpose will ...

Q. My house has an old wood front door and a steel back door. I cannot afford to replace them, but I want to make them more airtight and efficient. What things can I do myself to improve them? A.

Modern steel doors by USA Builders Depot are highly durable and built to meet the needs of modern building construction.

J.D.: Before attempting any door improvements, inspect each one, especially the wood door. If the wood is warped, there really is not much you can do but replace it with a new one. Steel or fiberglass ...