What effect does dry rot have on wood?

Dry rot is a term used to describe a specific type of wood decay caused by certain fungi that thrive in moist environments and can lead to significant structural damage. When wood is affected by dry rot, the fungal growth penetrates the wood fibers, breaking down the cellulose and lignin that provide strength and support. As a result, the integrity of the wood is compromised, leading to weakening and eventual deterioration.

This degradation can reduce the load-bearing capacity of the wood, making it less safe and more susceptible to further damage. The signs of dry rot can often include discoloration, a brittle texture, and a musty odor, which indicate that the wood is no longer sound. Thus, the correct answer emphasizes that dry rot indeed causes deterioration of the wood, making it clear that the structural integrity is negatively impacted.

In contrast, dry rot does not make wood stronger, nor does it leave it unchanged or increase its weight. In fact, the presence of dry rot often leads to a loss of mass and weight as the wood deteriorates.