When Isolation Makes You Sick

Did you know that even with good insulation, if it is not properly installed, condensation and mold growth remain a concern? It is therefore essential to understand the implications of poorly installed insulation on foundation walls, particularly in terms of condensation and mold.

Reasons for poor insulation installation:

As shown in the attached photos, extruded insulation glued with glue pellets leaves an air gap between the insulation and the foundation wall allowing relative humidity to condense on the cold part of the foundation walls.

This situation, which has been occurring in cold weather for decades, has encouraged the proliferation of mold microorganisms in very high concentrations, which spread fungal spores into the air, which are harmful to health.

When removing the insulation panels during my inspection, we can see the formation of ice caused by this moisture migration.

Consequences :

1. Condensation : When warm, humid indoor air comes into contact with cold foundation walls and condenses. Improperly installed insulation does not create the necessary barrier to prevent this from happening.

2. Mold Growth : Moisture from condensation creates an ideal environment for mold growth.

3. Air quality problems : Mold releases spores that can harm indoor air quality, posing health risks.

4. Structural degradation : Persistent moisture can affect the surrounding structure through diffusion or capillarity.

Recommendations for prevention:

As stated in the building code, in order to avoid the formation of condensation, the insulation must be installed continuously at all points in contact with the foundation wall.

1. Proper choice of insulation : Use moisture-resistant materials suitable for the specific conditions of the foundations.

2. Careful installation : Follow installation guidelines, including installing an effective vapor barrier and remembering to seal the joints between insulation panels.

3. Humidity Management : Ensure indoor humidity control.