Get matched with top door pros in Roscoe, IL

To achieve the correct opening size for a 30-inch door, add 2 inches to the door width and 2 ½ inches to the door height. For example, if you have a 30-inch-wide door with an 80-inch height, then the rough opening would measure 32 inches wide by 82 1/2 inches high

A slab door is a standalone door without a frame or hardware. A prehung door is a complete set that includes the door, frame, hinges, and sometimes the doorknob and lockset.

In most cases, a prehung door is the better and easier option to install, especially for DIY projects or exterior applications, as they often come pre-weatherproofed. They require fewer tools and less experience to install properly. Although prehung doors are heavier and have a higher upfront cost, the investment is often worthwhile for a complete upgrade that includes a new frame.

A slab door may be a better choice if you are on a tight budget, have a custom-sized wall opening, or only need to replace the door while keeping the existing frame. While the initial cost is lower, you will need to purchase all the hardware separately and do more DIY work to hang it, which may not result in significant time or money savings.

If you want to let in plenty of sunlight while keeping your home well insulated, your best bet is a patio-style door with two doors with full-view windows, including one primary door and one secondary door behind it, such as a screen door or storm door. This two-door system will let in plenty of natural light while maximizing insulation.

Spacing a door is tricky since you need to leave enough of a gap for the door to move freely and not get stuck when the slab and frame contract and expand in dry and humid conditions. The ideal gap between a doorframe and slab is 1/8 of an inch. If the gap is any larger, the door will feel drafty. But if the gap is any smaller, the slab can get stuck due to weather changes.