Address Excess Attic Moisture to Prevent Damage

News & Information > Address Excess Attic Moisture to Prevent Damage
2/9/2018


Excess attic moisture can quickly lead to significant problems. In addition to decreasing the effectiveness of insulation, excess moisture can lead to
structural damage. Rafters and trusses can begin to rot when excess moisture is not removed.

Here are some indicators that you have excess attic moisture:
  • Rust
  • Moisture or frost on roofing nails and/or a roof’s sheathing (plywood)
  • Dark stains
  • Water or drip marks on the attic floor
  • Buckled or damaged roof sheathing
  • Moist or wet insulation

If you suspect excess attic moisture, then there is probably another problem lurking in the darkness of your attic ... mold.

Mold needs three major factors to thrive: warm temperatures, moisture and organic material for food. These conditions must also be present for several days to allow mold to grow.

We know what you’re thinking. If mold needs warm temperatures to grow, how does it thrive in a cold attic? That’s where your ventilation system comes in – the system releases warm, moist air into your attic. When it’s aimed at the sheathing, mold now has the three things it needs to grow: warm temperatures, moisture and food.

Your ventilation system is just one possible contributor to attic mold growth. Other contributors include:
  • Roof Leaks
  • Errors in Insulation installation
  • Ice Dams


Preventing Excess Attic Moisture
The first step of prevention is proper ventilation. You want to keep your attic cool and well ventilated. Do not seal your attic vents. You also want to inspect your soffit vents to ensure they are free of obstructions like nests and debris.

In addition to proper ventilation, removing excess moisture from the livable space of your home can help prevent excess moisture in your attic. Things you can do include:
Run a de-humidifier
Limit use of a humidifier
Use your kitchen exhaust fan while cooking
Store firewood outdoors
Limit the amount of house plants within your home
Test the vapor barrier of your basement or crawl space

Lastly, if you suspect or confirm a mold problem, contact a professional.

Cleantec aims to offer helpful information to our clients and friends. Learn more about how we can help should your residence suffer from mold damage. Sign-up for our newsletter to receive helpful information and tips on how to protect your property from fire, water and mold damage.
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