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Mold Testing Reports from Mukilteo


Project Type > Full Mold Testing of Residential Home

Reason for inspection:

  • Client is in the hospital with severe respiratory problems.  His son plans on moving him back into the house but would like to have the home checked out for any potential respiratory hazards prior to this happening.  This is a full inspection with 3 indoor air quality samples.
Property Description:
  • Two story, single family residence built in 1985.
  • Approximately 3,234 ft²

JOBSITE PHOTOS

Stove Fan Broken

Stove Fan Broken

Dust Covering Contents

Dust Covering Contents

Fan Vents Not Ducted Properly

Fan Vents Not Ducted Properly

Air Fresheners Present Can Be A Respiratory Hazard

Air Fresheners Present Can Be A Respiratory Hazard

INTERIOR VENTILATION:

Moisture and Gas Measurements:  Main Floor

Moisture and Gas Measurements: Main Floor

Moisture and Gas Measurements:  Upstairs

Moisture and Gas Measurements: Upstairs

HVAC & FILTRATION:

  • Newer, high efficiency furnace in place.
  • No fresh air intake found on furnace system.
  • Electrostatic filter present on furnace. These systems are not found to be overly efficient at removing particulate from the air stream.  In addition, electrostatic filters can produce ozone which is a known indoor air contaminant and health hazard.
Recommendations:
  • Install fresh air intake on furnace. This consists of running a small duct from the exterior of the home to the cold air return.  Operated by a baffle, this duct pulls fresh air in from the outside and integrates it into the air stream directly before the furnace.  This allows the furnace to both heat and filter the fresh air before it enters the home.  The injection of fresh air significantly lowers the RH and pollutant levels within the home.
  • Replace existing electrostatic plates with a 4” Merv 11 pleated filter in tightly sealed filter box.

LOCATION:  Crawlspace

  • Vapor barrier was intact throughout the crawlspace and appeared to cover all exposed ground.
  • Insulation was in good condition with no evidence or rodents or damage.
  • 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.
  • HVAC ducting appeared to be in good condition, well insulated and sealed.
Recommendations:
  • Recommend air seal all major penetrations in subfloor.

 LOCATION:  Kitchen

  • Button to activate downdraft range fan was not operational at the time of inspection.
Recommendations:
  • Have the activation switch repaired to ensure downdraft ventilation fan can operate.

 LOCATION:  Fathers’ New Bedroom

  • Significant amounts of dust and cobwebs found throughout the room.
  • Carpets appeared old and worn.
Recommendations:
  • Recommend performing a thorough cleaning of all contents, walls and flat surfaces within the room to ensure no allergens remain.
  • Recommend replacing the carpet with a solid surface flooring to minimize potential allergens.

 LOCATION:  Den

  • Drapes found hanging in den were found to be very dusty.
  • Most contents and knick-knacks were found to be very dusty.

LOCATION:  Hall Bathroom

  • Noisy and inefficient ventilation fan present. This limits the removal of humidity from inside the building envelope.
  • Hardwood flooring appeared cupped, but no elevated moisture levels were noted.
Recommendations:
  • Recommend replacing ventilation fan to help remove humidity from inside the home.

LOCATION:  Mom’s Bedroom / Bathroom

  • Significant amounts of dust and cobwebs found throughout bedroom.
  • Noisy and inefficient ventilation fan present in bathroom. This limits the removal of humidity from inside the building envelope.
  • No areas of elevated moisture or visible mold growth noted. Note:  Shower does not appear to have been used for some time and current moisture content readings may not accurately be reflected.
Recommendations:
  • Recommend performing a thorough cleaning of all contents, walls and flat surfaces within the room to ensure no allergens remain.

 LOCATION:  Dad’s Room

  • Significant amounts of dust and cobwebs found throughout.

 LOCATION:  Hall Bathroom

  • Noisy and inefficient ventilation fan present. This limits the removal of humidity from inside the building envelope.

LOCATION:  Attic

  • Some mouse droppings were found in attic, but no damage was noted to any insulation.
  • Bathroom ventilation fans were ducted to a standard RVO vent. This is not recommended since some humidity may remain inside the attic.
  • Minimal ridge ventilation noted in attic but due to the shake roof, it may not be necessary.
Recommendations:
  • Recommend ducting all ventilation fans to dedicated, 4” collared roof vent.

 LABORATORY RESULTS

Lab Results 3

ANALYSIS OF YOUR RESULTS

  • No Amplification: No fungi were measured at levels equal to or above the threshold, and do not indicate a site of probable mold amplification and growth.  Please refer to the attached report for more detailed information.