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Mold Remediation Reports from Edmonds

Project Type > Mold Inspection & Remediation Report for a Basement

PROJECT SUMMARY

Reason for inspection:

  • Client has a renter with a basement bedroom that has been experiencing mold problems. Client requested an inspection of that room and recommendations on how to prevent this from happening further.

PROPERTY DESCRIPTION:

  • Two story duplex rental in Edmonds.
  • Home was built in 1971

OBSERVATIONS APPLICABLE TO ENTIRE INSPECTION AREA:

  • Elevated humidity was found throughout the basement.

JOBSITE PHOTOS

Condensation on Windows

Condensation on Windows

Wet Wallboard in Corner

Wet Wallboard in Corner

Mold Growth Under Carpet

Mold Growth Under Carpet

Light Stains on Shower Sealant

Light Stains on Shower Sealant

VENTILATION:

Observations:

  • Basement bathroom had a ventilation fan present but it is noisy and inefficient at removing relative humidity from inside the room.
  • Recommended ventilation of residential homes should be between 0.35 and 0.7 air changes per hour (ACH). Buildings that are inadequately ventilated will likely suffer from increased levels of humidity and miscellaneous building pollutants.  These factors may contribute to mold growth and other indoor air quality concerns.

LOCATION:  Basement Bedroom

On-site air measurements

RH:62 %Temp: 64°FCO2: 1158 ppmCO: 0 ppm

Observations:

  • Room is significantly cooler than the remainder of the basement due to the door remaining closed.
  • Light condensation was found on the bottom corner of the window.
  • Room had a strong musty odor upon entering.
  • Exterior corner of bedroom closet revealed some light discoloration on the bottom corner of the wall.
  • Elevated moisture levels were noted in the bottom 12” of sheetrock along exterior wall in closet.
  • Carpet was found to be wet. Significant mold growth was noted on the back side of the carpeting and the pad.
  • Tenants also noted that mold growth had been found on several pieces of contents stored inside the room. These items had been cleaned at the time of inspection.

Recommendations:

  • Recommend removal of wet sheetrock and any underlying insulation from bottom corner of bedroom closet wall.
  • Remove all affected carpet pad and damaged carpeting from closet.
  • Recommend leaving open the wall cavity to monitor any potential moisture intrusion from the concrete wall foundation.
  • Recommend keeping relative humidity levels below 55% to minimize condensation and mold growth on contents inside the bedroom.
  • If relative humidity levels are difficult to maintain below 55%, a dehumidifier may be necessary to help maintain these levels.