Mold & Moisture on Windows - Causes & Solutions

Project Report > Mold & Moisture on Windows

Ventilation:

• Adequate Ventilation Not Present
• Recommended ventilation of residential homes should be between 0.35 and 0.7 air changes per hour (ACH).
• Desired Ventilation Rate:  0.5 ACH (Air Changes per Hour)

Condensation on living room window

Recommendations:

• Improve ventilation by one of the methods listed below:
• Install ducted HRV (Venmar Constructo 1.0) in the utility room with registers placed in accordance with the diagram above, and all ducting run through the attic space.

Kitchen:

Moisture coming from kitchen window

Observations:

• Major condensation noted on window.
• Kitchen range exhaust hood not ducted to the exterior.
• Minor surface mold growth noted on window sill.
• RH:61.3% Temp:53.8°F CO2:2718ppm CO: 0ppm

Recommendations:

• All condensation should cease once ventilation improvements have been enacted.

Living Room:

Observations:

• Major condensation noted on windows
• Moderate surface mold growth noted on windowsills and casing
• RH:60.1% Temp:67.7°F CO2:2761ppm CO: 0ppm

Bedroom:

Condensation and growth on bedroom ceiling

• No increased moisture content noted in building materials, except active condensation noted on ceiling.
• Inspection with FLIR revealed major insulation defects in exterior wall.
• Major condensation noted on windows.
• Obvious dripping condensation noted on ceiling at exterior corner.
• Significant visible mold growth noted on window sills and casings.
• Moderate visible surface mold growth noted on ceiling at exterior corner.
• Minor surface mold growth noted on baseboards at exterior corner.
• RH:60.6% Temp:68.5F CO2:2786ppm CO: 0ppm

Bathroom

• 110CFM Broan exhaust fan installed in this area.
• Increased moisture content noted in baseboard and sheetrock immediately behind the toilet and adjacent to the shower.
• Mold growth is likely present in this wall cavity.
• Storage area sufficient to house an HRV located in this area
• RH:57.9% Temp:69.2°F CO2:2840pm CO: 0ppm

Recommendations:

• Install splash-guard to prevent further water damage to the walls.
• Address wet building materials.

 Laundry Closet:

• 40CFM nutone exhaust fan in this area
• Minor mold growth around the laundry exhaust fan.