What is the most important thing to remember when sistering floor joists? What is the most important thing to remember when sistering floor joists?

Since sistering floor joists reinforces the original joists to support the ceiling or flooring, it is very important that you do the job right. The most important thing that you have to remember when sistering floor joists is taking your time. Since this is a repair project, it can not be rushed. Take the time to properly evaluate the source and gravity of the problem and make sure you take the necessary steps to treat it. For example, if the root cause of the damage to the current joists is water seepage, take time to address that first before reinforcing because the sister joists will get damaged again anyway.

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