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Mold Inspection Reports from Sammamish

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

Project Type > Water Damage Inspection for Chimney in Sammamish

PROJECT SUMMARY

REASON FOR INSPECTION:

  • The chimney has suffered a massive flashing failure which has affected the entice chimney chase.

PROPERTY DESCRIPTION:

  • This single family residential property was built in 1999 and is 2,210 ft²

JOBSITE PHOTOS

Deteriorated OSB as seen from inside of the chimney chase.

Deteriorated OSB as seen from inside of the chimney chase.

Warped siding.

Warped siding.

 Elevated moisture in the siding.

Elevated moisture in the siding.

LOCATION: Chimney Chase

OBSERVATIONS:

  • Evidence of a leak is present in the chimney chase.
  • The source of the moisture intrusion is due to failed flashing along the chase as it joins the roof line.
  • This area is separate from the conditioned space of the home. Therefore, any mold found will not infiltrate the living space.
  • The chimney chase runs from the ground level to about 3 feet above the peak of the roof.
  • As viewed from the attic space, the OSB has completely deteriorated on the street-facing side of the chimney.
  • The siding has warped to the point that the outside can be seen from the inside of the chase.
  • The water intrusion has affected all sides and levels of the chimney chase.

Recommendations:

  • Remove all damaged siding and OSB on the chase. Although discovery of additional damage is possible, it is not expected.
  • A traditional general contractor may be used for this work as it is all on the exterior of the home.

Project Type > Mold Inspection for a Bathroom in Sammamish

PROJECT SUMMARY

REASON FOR INSPECTION:

  • Property owner has been notified that they may have elevated mold spor counts in a master bathroom due to water saturation.  Owner has removed the mold affected building materials.  Environix hired to take two indoor air quality samples and inspect the area for moisture.

PROPERTY DESCRIPTION:

  • This single family 2 story residential property was built in 2003 and is 2,260 ft².

CAUSE OF MOLD:

  • Water run-off from shower in master bathroom. Indoor air quality sample showed low to moderate levels of mold spores that are typical for carpets in humid environments such as bathrooms.

 LABORATORY RESULTS

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ANALYSIS OF YOUR RESULTS:

  • Moderate Amplification: Mold spores were detected at levels above the threshold during the post rake air sample, indicating a site of probable mold amplification and growth. These levels do not justify removal of carpet and pad but recommend a professional carpet cleaner be hired to clean carpets.
  • Low Amplification: Mold spores were detected at levels below the threshold during the pre rake air sample, indicating no problems in the environment.

The most likely contributor of the elevated mold spores is:

  • Elevated humidity.
  • Recent water intrusion.
  • Carpet in bathroom.

Recommendations:

  • Removal of the carpeting is recommended. Otherwise, professional cleaning of the carpeting can be performed first.  However, cleaning is often insufficient to remove the excessive mold spores long term.
  • Carpeting in room is old and a likely storehouse of mold spores. Carpeting can hold mold spores for long periods of time, long after the original source of the mold growth humidity has been removed.
  • Mold spore levels do not justify removal or carpet and pad. It is good practice not to have carpet in any area the will have high humidity or have direct contact with a water source such as a shower, bathtub, washing machine and toilet.

JOBSITE PHOTOS

Area found to have very minor mold growth staining in pad of carpet.

Area found to have very minor mold growth staining in pad of carpet.

Minor mold growth-water staining on pad of carpet. Tac strip showed no signs of mold growth and sub floor was dry at this location at the time of inspection.

Minor mold growth-water staining on pad of carpet. Tac strip showed no signs of mold growth and sub floor was dry at this location at the time of inspection.

Elevated moisture at the area of vinyl floor where exit of shower is most prevalent. Past location of saturated carpet and pad which has recently been removed and replaced with existing vinyl floor shown.

Elevated moisture at the area of vinyl floor where exit of shower is most prevalent. Past location of saturated carpet and pad which has recently been removed and replaced with existing vinyl floor shown.

Consider removing all carpet from main portion of master bathroom to minimize future water damage to carpet and pad.

Consider removing all carpet from main portion of master bathroom to minimize future water damage to carpet and pad.

Minor caulking failure.

Minor caulking failure.

RELATIVE HUMIDITY, CO2, & TEMPERATURE READINGS:

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LOCATION:  Master Bathroom

Observations:

  • Mold growth noted on the carpet of the bathroom. The carpet was pulled back to reveal a dry subfloor with evidence of prior mold growth on the carpet and pad right in front of the tub and shower wall.

SHOWER:

  • Grout and caulking is in fair condition and shows some signs of recent water intrusion at one area at tub wall.

FLOORING:

  • Elevated moisture detected in flooring in front of shower door. The area of moisture is approximately two square feet.
  • The source of this moisture is both water spilling out of the shower and foot traffic from exiting the shower.

Recommendations:

  • Professional mold remediation is not necessary to properly address the existing mold spore counts.
  • Consider having the carpets cleaned using a hot water extraction method. Ensure the carpets are able to dry very quickly.
  • Consider better water controls in the bathroom to not saturate carpet and pad during normal usage. Recommend cleaning up all water and drying all floor mats after shower or tub usage.  Recommend installing all vinyl floors in the bathroom.