Attic Mold in Michigan is extremely common in our climate. Most people realize the importance of insulating an attic, but few realize that the ventilation of the attic is as important. If the attic has in-adequate ventilation, the warm air of the home will rise into the attic and be unable to exit this area.
This is why, in cold weather, moisture condenses on cold surfaces (like attic roof sheathing/decking). This moisture provides a perfect situation where mold grows. Our mission is to aid present or prospective home owners by not only conducting attic mold inspections but also inform the home owners of potential causes and remediation methods.
The need for proper attic ventilation cannot be overstated enough. Bad attic ventilation can cause moisture buildup on the roof sheathing and lead to the formation of attic mold. Total Net Free Ventilating Area (TFNVA) refers to the fact that there should be proper ventilation for every 150 square feet of attic space.
The number is a recommendation by the Federal Housing Administration, which recommends between a 1/150 to a 1/300 ratio depending on the age of the home. If you have an older home then a 1/300 ratio is suitable, since the home is probably less energy efficient and thus less airtight. The building codes of new homes over the past 20 years are much stricter, making them more airtight and therefore requiring additional ventilation.
M.M.S. recommends a 1/150 ratio for attics with evidence of mold.
M.M.S. inspects attic intake vents for blockage, calculates recommended venting requirements and checks for roof leaks and improperly vented fans.