#751: Disaster Mansion, Drippy Ceilings, and Insulating Existing Walls

Prioritize finding the right contractor by researching local industry leaders, reputable material suppliers, and professional organizations like NARI or NAHB, and conduct thorough interviews before inviting them to your home.

For existing homes, address major energy and safety issues (like combustion appliance safety and large thermal bypasses) before focusing on insulation, as these can be more critical for overall performance and occupant safety.

When tackling persistent bathroom condensation, first ensure proper ventilation by fixing and insulating existing bath fans, and consider adding an HVAC supply vent to introduce conditioned, dehumidified air.

Recognize that correctly installing ventilation systems (like bath fans and range hoods) often involves multiple trades; as a homeowner or GC, proactively coordinate all parties to ensure proper termination and sealing.

When planning extensive insulation upgrades in older homes, consider getting a professional energy audit and blower door test first to identify critical air leaks and ventilation needs, as these often yield more significant improvements than insulation alone.

Be cautious of the 'Bonfigly wall' approach (adding rigid insulation to studs) in renovations; while effective for new, well-sealed construction, it might not be the most cost-effective or impactful solution for older homes compared to comprehensive air sealing and water management.