We all worry about our windows when it comes to insulation, but door insulation is the biggest challenge whether it's hot or cold outside. Door are the most likely place for air leaks - in or outDoors often don't align properly given their size and the integrity of the latch. The result is that there are leaks that both let air in and out to compromise door insulation. Adjust your lockset configuration and alignment for a tight fit. The integrity of the lockset, or the way that a deadbolt or door latch engages has the most to do with how well a door seals against the gasket and the frame ensuring the best door insulation. Get a tight seal against the framePush against your doors from the inside. If there is give at the top or bottom you don't have good door insulation with a tight seal against the frame. Weather stripping for the long-termWeather stripping ensures a snug fit between the door and frame and is a relatively inexpensive remedial action. Just remember it doesn't last forever. Keep the hinges tight for a clean close and sealDoors are attached to the frame with screws that hold and connect the hinges. Over time, they come loose and pull out of the woodwork. Make sure you screw the hinges in tight, or replace screws that have worked out of the woodwork. Hinges make a big difference when it comes to door insulation.Image: EPSTOCK/Shutterstock