Person A: Many homeowners believe that applying a clear wood sealer annually will protect their exterior wood siding and extend its lifespan. However, clear sealers offer minimal protection against UV degradation, which is the primary cause of wood weathering and breakdown. Therefore, annual applications of clear sealer are unlikely to significantly prolong the life of exterior wood siding.
Person B: But UV degradation only affects the surface layer of the wood. As long as the underlying wood remains protected from moisture, which clear sealers do provide, the siding will maintain its structural integrity, even if the surface weathers.
How does Person B respond to Person A’s argument?
Answer: