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Not all porch columns are load-bearing, though they can be. Some porch columns are simply decorative. There are ways to identify a load-bearing column, like looking for visible seams and a foundation. Also, check to see if the column directly enters the ground. In some porch installations, a contractor will excavate a hole to install a column into the earth along with a buried cement base for stability.

With proper maintenance, the average life span of a screened-in porch is six to eight years for the screens themselves, but the foundation and structure can last for 50 to 100 years. To keep your screened-in porch in good shape, clean your porch screens regularly, patch holes, re-seal the wood as needed, and address any foundational issues right away.

The signs of rot depend on the type. Dry rot looks like cube-shaped cracks with a fluffy white, cotton-like texture. Wood with dry rot may also have a strong, musty smell. 

Signs of other types of rot include wood that looks mushy or has black spots. The wood may crumble or give way when touched.

In most cases, repairing a deck costs much less than replacing it. Deck repairs cost around $2,000 on average, while the cost of deck replacement is at least $7,900. Repairing involves fixing issues like loose boards or small cracks, which requires less material and labor. If the deck has extensive damage, though, the cost of repairs can add up quickly, and it may be more cost-effective to replace the deck entirely.