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On average, sliding glass patio doors can last between 20 and 30 years. Their actual lifespan depends on several factors, including proper installation, frequency of use, and regular maintenance of the sliding components. While this is the typical range, minor problems and the need for occasional repairs or part replacements can still occur. Addressing issues as soon as they arise and performing regular maintenance will help extend the door's life. If the door is older and requires frequent or significant repairs, it may be more cost-effective to replace the entire unit.

The proper height for a gate latch is between 34 and 48 inches above the ground. This height will not only be comfortable for you and your family to use, but it’ll also ensure that your latch complies with the International Building Code.

Sometimes one-way latches are installed very high on the gate to make it easier to open, although it’s only easier for tall people. Installing a two-way latch at the proper height is a good idea.

You can’t gauge the lifetime of a fire door like you could, say, an engine. Fire doors should be checked at least once every six months to ensure there are no signs of degradation like leaks, holes, water damage, termite damage, or anything else that might compromise the functionality of the door’s fire resistance. Check your smoke detectors while you’re at it.

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.