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A door swells up when there’s a lot of moisture in the air. Wood doors are porous, and the elements can cause them to expand with humidity and contract with dry air. Prevent swelling by coating the door in weather-resistant paint, which creates a barrier to seal out moisture. Otherwise, go with a water-repellent finish after the fact. On the plus side, this problem will go away once the weather changes.

A prehung door is a door that comes ready to install, already mounted in its frame with hinges and stop molding included. Because everything is factory-aligned, installation is quicker, more precise, and convenient, as you don't need to drill or align the hinges yourself. This makes it a smart option if your current frame is damaged, uneven, or if you're working on a new build. Installation involves fitting the entire unit into the rough opening, shimming and leveling it, and then securing it. If you are replacing an existing prehung door, the process is even simpler, often just requiring you to swap the old unit for the new one and secure it with a few screws. Prehung doors typically cost only slightly more (around $20) than a door slab alone, making them an efficient choice.

A security door costs an average of $1,400, but costs can range from $600 for a simple screen or steel door to more than $4,600 for a wrought-iron security door. You can also buy specialized locks separately for $200 to $600. If you decide to hire a pro to install your new security door, you’ll spend around $275 to $425 on labor costs.

When hanging a door frame, it’s recommended that you use screws, not nails. Screws are more secure, easier to tighten, and easier to remove if you need to adjust the frame. On average, the cost to replace a door frame is about $400, but you can save on labor costs if you’re confident in your ability to DIY the project.