#747: Lab Grown Lumber, Controlling Humidity, and Exterior Insulation

Always ensure proper flashing, especially for deck ledgers and doors, as flashing failures are a leading cause of severe rot and can impact structural integrity, even in relatively new homes.

Consider helical piers as a faster and potentially cheaper alternative to traditional concrete piers for decks, porches, and even some foundations, offering immediate use after installation.

When dealing with humidity in old homes, start by sealing obvious holes like windows and addressing roof leaks, then focus on stopping moisture intrusion from the ground, such as by installing a vapor barrier in dirt crawl spaces.

For continuous exterior insulation in mixed climates, both XPS and foil-faced polyiso are viable, but ensure polyiso is thick enough to keep sheathing warm in winter, mitigating R-value reduction in cold temperatures.

Prioritize air sealing, regardless of the chosen insulation material, as an airtight envelope is crucial for managing moisture and energy efficiency in any climate, especially when using vapor-open products.

Before making major changes to existing heating systems in old houses, especially steam boilers, consult with specialists; these systems can be surprisingly robust and often rely on their original configuration to function without developing new leaks.

Encapsulating a crawl space can significantly improve indoor air quality, comfort, and pest control, making it a worthwhile investment for many homeowners, particularly in humid climates.