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Garage door sensors work by using infrared beams to detect objects in the door’s path. One sensor sends a beam while the other receives it. When the beam is broken—say, by your car or anything else—the sensors signal the door to stop or reverse. It’s all about safety and making sure nothing gets trapped under the door. If they’re misaligned, the beam doesn’t connect, and the garage door might stay open or close regardless of obstructions.

Yes, you can pressure wash epoxy garage floors. Most epoxy floors can be cleaned with a mop, but you may choose to pressure wash your floor if it is stained, has ground-in dirt, or is covered with mold or mildew. Before pressure washing, soak stains and dirty areas with a gentle cleanser for best results. Then use a pressure washer tip angled at 45 degrees and raise the spray nozzle to at least 18 inches off the floor to protect the flooring surface. You can also use a surface cleaner power washer or rotary scrubber to prevent overspray. 

Insulating a detached garage won't reduce your home's heating or cooling bills—and insulating an attached garage will only have a small effect on your home's energy efficiency. However, insulating an attached garage can reduce the transfer of heating and cooling to and from the outdoors, which can reduce the amount of energy your home needs to stay comfortable. Also, having an insulated garage is just more pleasant. Balance the cost of insulating your garage with how you'll use the space to determine if the project is worth it.

No, there should not be a gap between the garage door and the floor. This gap can allow rodents and insects to infest your home. It also creates an entryway for rain and melted snow that can damage your home's foundation or cause mold issues. Finally, leaving a gap will increase your energy bills by allowing heat to escape more easily. If you're looking for something more airy, consider one of the many garage door alternatives.