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Mold Inspection Reports from Auburn

Below are recent mold inspection projects we’ve completed in the Auburn area.  These reports can help provide you with an idea of the issues we typically encounter in your region.

Project Report > Mold Inspection & Odor Detection for Residence

PROJECT SUMMARY

REASON FOR INSPECTION:

  • Client has noticed an odor coming from the top of the stairs and the basement itself.  She has just purchased the home and has hired Environix to find the cause of the odor and bring solutions to solve them.

PROPERTY DESCRIPTION:

  • This single family 2 story residential property was built in 1992 and is 2,610 ft².

CAUSE OF MOLD and/or Odor:

  • Odor is being caused by a lack of ventilation in the crawl space along with some missing vapor barrier directly under the stairs.

 LABORATORY RESULTS

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JOBSITE PHOTOS

Area of indoor air quality sample.

Area of indoor air quality sample.

Stairwell that has no vapor barrier under it in the crawl space. this may be allowing odors from the crawl space to infiltrate to the interior of the home.

Stairwell that has no vapor barrier under it in the crawl space. this may be allowing odors from the crawl space to infiltrate to the interior of the home.

Supply heat vents are present along the wall that separates the living space from the crawl space. these vents are not air sealed and may be allowing odors to enter the space.

Supply heat vents are present along the wall that separates the living space from the crawl space. these vents are not air sealed and may be allowing odors to enter the space.

Kitchenette that shares a wall with the crawl space that has areas of mold growth and no vapor barrier.

Kitchenette that shares a wall with the crawl space that has areas of mold growth and no vapor barrier.

Directly under the stairs. No vapor barrier and mild mold growth on the uncovered soil.

Directly under the stairs. No vapor barrier and mild mold growth on the uncovered soil.

Mold growth.

Mold growth.

Subfloor of stairs are clean but may be allowing odors in to the interior of the property due to a lack of cross ventilation in the side wall so the crawl space in this narrow area.

Subfloor of stairs are clean but may be allowing odors in to the interior of the property due to a lack of cross ventilation in the side wall so the crawl space in this narrow area.

No mold growth on crawl space side of interior walls. Insulation is sufficient and a vapor barrier is present.

No mold growth on crawl space side of interior walls. Insulation is sufficient and a vapor barrier is present.

Maximize cross ventilation in the crawl space by adding three vents at this location.

Maximize cross ventilation in the crawl space by adding three vents at this location.

OBSERVATIONS

  • The client reports they have been running a dehumidifier for the last two weeks, and emptying a bucket of condensation removed from the air every couple of days.

HVAC:

HVAC Observations:

  • The home is equipped with forced air gas heat in the main part of the home, as well as electric wall heaters in the basement.
  • No fresh air intake found on furnace system. Fresh air intakes can be very effective at lowering the interior RH in the home.

Recommendations:

  • Look into adding a fresh air intake to furnace system. This can help lower indoor humidity.

RELATIVE HUMIDITY & TEMPERATURE READINGS:

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LOCATION:  Crawlspace

Observations:

  • An odor is present in the crawlspace.
  • No ventilation is present in the crawlspace.
  • Vapor barrier is missing. Exposed areas of soil in the crawlspace allow significant quantities of water vapor to migrate upward into the home, increasing the relative humidity. Additionally, exposed areas of soil often allow odors to move upward into the home.
  • Visible mold growth observed in areas of exposed soil. Due to the stack effect in a home (warm air rises, creating upward air movement), mold growth in the crawlspace can impact the indoor air quality in the main living space.
  • No air sealing noted in subfloor. Air sealing is a technique where the small holes and gaps in the subfloor, such as around plumbing fixtures, are sealed with expanding foam. This greatly reduces the air movement from the crawlspace into the main living area of the home.  Not only does this improve the energy efficiency of the home, it significantly reduces the flow of odors and mold spores from the crawlspace into the home.

Recommendations:

  • Due to the mold growth and odor problems in the crawlspace, mold remediation is recommended. See included pricing below for the following services:
  • Install a new vapor barrier as needed throughout the crawlspace, ensuring all exposed soil is covered.
    • Air seal all major penetrations in subfloor.
    • Add 100 ft² of vapor barrier under the stairs and on the slab area as well.
    • Clean mold and apply mildicide treatment to the affected area.
  • Have a general contractor add three vents on the South end of the crawlspace, and add two vents on the North side of the crawlspace. Maximizing air flow in the crawl space is crucial to help stop future odor issues.

LOCATION:  Basement

General Observations:

  • No noticeable odor was noted in the basement at time of inspection.
  • The basement walls face the crawlspace in all rooms.
  • The basement walls are finished with drywall on one side only.
  • No ventilation is present in the crawlspace for this area.