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Indoor Air Quality Testing: Mold Growth in Older vs. New Homes in Albany, NY

Maintaining clean indoor air quality is crucial for the health and safety of the occupants and of the home. While many factors can affect indoor air quality - one common issue in both older homes built in the early 1900s and new homes is the susceptibility of mold growth based on individual factors. Mold can lead to health complications immediately and or manifest over time. However, there are a handful of variables that can contribute to mold growth in older and newer homes both having their own unique complications. In Albany, NY, where humidity levels can be high understanding these contributing factors are essential for an indoor quality testing specialist to determine the underlying cause.

Air Tightness and Insulation

Older homes built in the early 1900s often have poor air tightness and inadequate insulation. This lack of proper sealing and insulation can lead to drafts and temperature fluctuations, creating conditions favorable for mold growth. In contrast, newer homes are typically built with better insulation and air sealing technique but lack proper ventilation which may lead to condensation, stagnate air and trapped moisture.

Water Table and Soil Absorption

Albany's water table and soil absorption rates can significantly affect the moisture levels in basements and crawl spaces. Older homes may have issues with water infiltration due to outdated waterproofing methods, whereas newer homes often incorporate modern drainage and foundation waterproofing techniques. Have you ever entered a damp basement in an older structure but do not smell mold? The lack of air sealing at times in older homes may assist with ventilation which may prevent mold growth in a damp basement. In contrast, newer homes that become damp and or have water leakage/moisture issue will almost always have mold growth immediately.

Humidity Levels

Indoor humidity levels play a vital role in mold growth. Activities such as growing plants indoors can increase humidity levels especially in newer home due to the newer homes being built so air tight. Keep in mind adequate ventilation when growing plants on the interior of your home.

Lack of Ventilation

Inadequate ventilation in bathrooms without proper ventilation can lead to moisture buildup, providing an ideal environment for mold to thrive. Some older homes do not have bathroom vents. In contrast, newer homes often have better-designed ventilation systems to mitigate this issue. Just make sure the bathroom vents are venting through to the exterior (not in the attic).

Lack of Attic Insulation and Ventilation

Older homes may lack insulation on the attic floor, leading to thermal bridging, which can create temperature differentials and promote condensation. In a nut shell, air that is heated and cooled tends to have high humidity levels. If the air from the habitable space below leaks into the attic due to insufficient insulation on the attic floor mold growth may occur due to condensation on the roof sheathing/rafters. Additionally, inadequate attic ventilation can exacerbate moisture issues. If your attic does not allow air in and out of the attic humidity levels will increase. Newer homes typically include better insulation and ventilation solutions. But at times when roofs are replaced the ventilation is overlooked. There is a less margin of error for poor ventilation in an attic in homes that are newer.

Basement and Crawl Space Issues

Basements in older homes may be prone to flooding due to outdated drainage systems. This can create the perfect breeding ground for mold. Crawl spaces can also be problematic if they lack proper ventilation. Newer homes tend to address these issues more effectively.

Improper Venting

Dryer vents and bathroom vents not vented properly to the exterior can lead to moisture accumulation within the home, increasing the risk of mold growth. Newer homes often incorporate proper venting solutions for dryer vents and bathroom vents. All vents should discharge to the exterior.


Indoor air quality testing is essential in both older homes built in the early 1900s and new homes in Albany, NY. While mold growth is a common concern, various factors can contribute to it in different ways in these two types of homes. As you consider indoor air quality testing, keep in mind the unique challenges and advantages presented by your home's age and design. Addressing these issues through proper ventilation, insulation, and humidity control is key to maintaining a healthy living environment in Albany, regardless of the age of your home.

Call us Today for all of your indoor air quality solutions.

The Author Adam Clark is the owner and operator of Shield Guard Home Inspections. Adam Clark is a local Home Inspector located in Albany NY that has performed over 8000 Inspections Phone: (518) 649-9111


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