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You’ll usually need to prime a garage floor before painting—especially if the floor is unpainted. Garage floors are made from concrete, which is porous and produces dust. The dust can contaminate the paint and cause issues with adherence. 

Primer creates a barrier and gives you a clean surface to work on. It also minimizes absorption to help give you an even, pro-looking paint job. Make sure you choose a primer that’s specifically designed to cover concrete flooring.

The average cost to install a new garage door is around $1,224, with most homeowners paying between $755 and $1,696. However, the total price can range from $250 to as high as $4,500 depending on several factors. Key cost drivers include the door's size, type, style, and material. For instance, wood or wood composite doors are typically more expensive than vinyl or aluminum options. Insulation also affects the price. Labor costs are often bundled into the total price, but if billed separately, can range from $200 to $500. Due to the complexity and danger, professional installation is recommended.

A garage door panel is a section of the garage door that spans the width of the door and connects to other panels above and/or below to create a folding door. The panels usually each have rollers on the sides that fit into the tracks and direct the sectioned door to open and close while remaining in balance.

Standard garage door sizes for single doors range from 8 feet wide by 7 feet tall to 9 feet wide by 7 feet tall. An oversized single garage door would be 10 feet wide by 7 feet wide. The standard size for double garage doors is 16 feet wide by 7 feet high. However, some custom double garage doors can be as wide as 20 feet.