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Seattle Crawl Space Mold Inspection Reports

 

Below are recent inspections of crawl space mold issues we’ve performed in Seattle.


 

Project Type > Crawl Space Assessment & Remediation for Seattle

PROJECT SUMMARY

REASON FOR INSPECTION:

  • Client is experiencing allergy type symptoms when in office which is above the crawlspace.  Environix hired to inspect the crawlspace to identify issues that could be contributing to his symptoms.

PROPERTY DESCRIPTION:

  • This single family residential property was built in 1956 and is 3,380 ft².

CAUSE OF MOLD:

  • Mold growth on the crawlspace floor is from exposed soil and no ventilation.

JOBSITE PHOTOS

Blocked vent

Blocked vent

Discoloration on wood framing below vent from previous moisture intrusion

Discoloration on wood framing below vent from previous moisture intrusion

Efflorescence and mold growth on soil

Efflorescence and mold growth on soil

No vapor barrier on crawlspace floor

No vapor barrier on crawlspace floor

Mold growth on soil

Mold growth on soil

Air leaks throughout furnace ducting

Air leaks throughout furnace ducting

OBSERVATIONS

LABORATORY RESULTS

15

ANALYSIS OF YOUR RESULTS:

No Amplification (<threshold):  No mold spores were measured at levels equal to or above the threshold, and do not indicate a site of probable mold amplification and growth.

MOLD GROWTH:

Status:

  • No mold found on structural materials – No mold growth observed on the building materials during the inspection. This includes the subfloor, floor joists, foundation walls, and beams.
  • Mold present on exposed soil. 100% of the exposed soil has mold present.

Cause:

  • Mold growth due to poor ventilation.
  • Mold growth due to exposed soil.

Recommendations:

  • Remove the top layer of affected soil.
  • Treat the soil underneath.

INSULATION:

  • None – Crawlspace is currently un-insulated.

Recommendations:

  • Consider installing insulation.

VAPOR BARRIER:

Status:

  • Missing – Vapor barrier not currently installed, allowing excessive moisture transfer from damp soil into crawlspace framing.

Details:

  • Contributing to mold or odor problems in home.

Recommendations:

  • Install vapor barrier. Environix will address this in the bid, below.

VENTILATION:

Status:

  • Insufficient – The crawlspace lacks sufficient ventilation to exhaust normal amount of moisture. The lack of ventilation is a contributing factor in the buildup of excess moisture and creates conditions conducive to mold growth.

Details:

  • Contributing to problems. The lack of ventilation in the crawlspace is contributing to mold or odors in the home.

Recommendations:

  • Hire a contractor to install additional ventilation.

DUCTING:

Status:

  • Poorly sealed HVAC – The crawlspace contains HVAC ducting which is not adequately sealed. This can allow conditioned air to escape into the crawlspace, and crawlspace air to enter the heating system.  All HVAC ducting in unconditioned spaces must be securely attached and sealed with high-velocity duct sealant to reduce heat loss and prevent indoor air quality issues.

Recommendations:

  • Hire an HVAC contractor to properly seal the HVAC ducting in the crawlspace.