Asdal Builders took on the challenge of transforming a 1930s-era bungalow in Pittsburgh, PA, into a high-performance home while maintaining its original structure. This project aimed to demonstrate that deep energy reductions are achievable in existing homes using practical, widely available materials and construction techniques.

The renovation involved a comprehensive energy retrofit, including:

• Advanced Insulation & Air Sealing: The home’s walls, ceilings, and foundation were insulated with a combination of blown cellulose, rigid foam, and spray-applied air sealing to significantly reduce heat loss.

• High-Performance Mechanical Systems: The aging natural gas boiler was replaced with a sealed combustion, power-vented unit, eliminating safety concerns while improving efficiency. The home also incorporated mechanical ventilation systems for balanced airflow.

• Envelope Upgrades: Energy-efficient windows and doors, a new insulated siding system, and meticulous caulking and sealing enhanced the home's thermal performance.

• Sustainable Materials & Healthy Living Features: Low-VOC paints, cork flooring, and moisture management strategies were integrated to improve indoor air quality and durability.

• Optimized Energy Performance: The home's HERS Index score improved from 185 to 65, achieving an 80% reduction in energy use—a level that exceeds standard building codes and aligns with the U.S. Department of Energy’s Building America Builder’s Challenge.

The project served as a demonstration for Affordable Comfort, Inc., a nonprofit dedicated to advancing home performance education. The results highlight the potential for cost-effective energy efficiency upgrades in older homes, with long-term benefits for homeowners, builders, and the environment.

This case study underscores the practical application of deep energy retrofits, demonstrating that with the right approach, even aging structures can be transformed into efficient, durable, and comfortable homes for the future.