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Interior Mold

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Recent Inspection Report Regarding Interior Mold Issues

Work #: 202003


Mid 1950's ranch style home built over a crawlspace.

LOCATION: Master Bedroom

Summary: Abnormal Conditions Found!


  • Extremely high humidity noted upon entering room.
  • Excessive moisture levels were detected on window sills - apparently from heavy condensation.
  • No suspicious temperature differentials found with thermal imaging.
  • No obvious signs of water damage noted.
  • No significant mold growth observed.
  • RH:67 % Temp: 65°F CO2: 652 ppm CO: 0 ppm


  • Recommend opening window coverings each morning to allow for accumulated relative humidity to evaporate from the windows and sills.
  • Use existing ventilation fans to help evacuate any relative humidity from inside the rooms.
  • Recommend installing a hygrometer monitor the relative humidity levels inside the home.

LOCATION: Utility Room

Summary: Abnormal Conditions Found!


  • Sound of running water was heard upon entering room.
  • No increased moisture content noted in building materials.
  • Condensation was noted on the cold water supply line to the hot water tank.
  • Blow-off valve appeared to be stuck open allowing a constant flow of hot water into the crawlspace below.
  • No obvious signs of water damage noted in utility room.
  • No significant mold growth observed in utility room.
  • RH:65 % Temp: 65°F CO2: 589 ppm CO: 0 ppm


  • Recommend having a plumber make repairs or replace faulty components of the hot water tank and/or pressure release valve.

LOCATION: Crawlspace.

Summary: Abnormal Conditions Found!


  • Excessive amounts of steam were released upon opening crawlspace hatch.
  • Crawlspace hatch was excessively wet and showed some minor mold growth.
  • All insulation in crawlspace was covered in moisture.
  • Standing water was noticed on vapor barrier in many locations.
  • Steady stream of water was coming into crawlspace from hot water tank pressure release valve.
  • Heavy mold growth was observed on underside of subfloor in locations where insulation was missing.
  • All wood (joists, subfloor and framing) was saturated with moisture.
  • Concrete block foundation was wet but appeared to be in good condition.
  • Separate crawlspace under master bedroom did not appear to need remediation.


  • Recommend removal of all insulation from crawlspace and install a desiccant style dehumidifier to dry the area as quickly as possible.
  • Once crawlspace is dry, it is recommended that a two-stage chemical remediation be conducted to the crawlspace subfloor and joists.
  • After drying and remediation, it is recommended to remove and replace the existing vapor barrier with an industry standard, black 6 mil poly plastic sheeting.


Summary: Abnormal Conditions Found!


  • Excessive amounts of condensation were found on windows and garage door.
  • Visible mold growth was found on many of the contents present in garage.
  • Ceiling sheetrock and support beam was showing signs of mold growth.
  • Back wall of garage already had significant amounts of mold growth.
  • Attic space revealed excessively wet attic sheathing and moderate to heavy mold growth.
  • Significant amount of contents were present inside garage.
  • Garage had limited ventilation (only ridge venting was present in attic space.)
  • RH:70 % Temp: 55°F CO2: 435 ppm CO: 0 ppm


  • Recommend keeping a door and/or window open in the garage as much as possible to help evacuate the relative humidity from inside the space.
  • Recommend removal of all contents. Non porous items can be wiped down with a mild soap and water solution. Porous items can be vacuumed and cleaned in an open air environment. Some staining may remain on porous items which may require them to be disposed of.
  • Table top of workbench must be disposed of due to water damage and mold growth.
  • Recommend walls and ceiling be HEPA vacuumed of mold growth.
  • Recommend a two stage - chemical remediation treatment be applied to the sheetrock and attic spaces. 
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