Rafters sheathing joists attic side of fascia boards etc.
White mold in attic roof.
In the attic photograph at left we show a mix of green gray and white attic mold.
Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.
This is why it s less common to see mold growth on base trim after a flooding event.
White mold tends to grow in high humidity environments rather than areas suffering from total saturation.
Even in this case in our opinion the reasons to remove and replace roof sheathing and framing would normally be based on the condition of the roof framing and sheathing not on the.
White mold is lesser known but still an incredibly dangerous species of mold to deal with.
The vast majority of attic mold is caused by humidity which is why white mold growth is common here.
Typically the condensation is caused by several compounding factors.
Because the majority of attic mold cases are caused by condensation it means you ll rarely find a smoking gun.
Mold growth in an attic comes as a consequence of excess moisture.
Prevent future mold growth.
Identifying the roof cause of attic mold.
In short you ll need to address the issue again and again which is a great frustration.
This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.
Below are a few ways to check for possible roof leaks.
The photo at page top shows white attic mold on the roof sheathing and rafters and some brown or black mold on the attic side of ceiling drywall where we pulled back insulation.
Is it dangerous how to remove it.
Roof leaks will often lead to a small localized area of attic mold near where the leak is occurring.
In our roof interior attic photo at left you can see antique roof framing along with black stains and probably some mold growth from a long history of roof leaks.
Faulty roof insulation or construction can lead to leaks and a lack of proper ventilation can cause humidity to accumulate.
Attic sheathing and framing.
If one encapsulates attic mold with a clear sealant like many mold remediation companies do future home inspectors and homeowners won t have any idea if the visible black white mold staining in the attic is current or historic.
If there is a leak in the roof plumbing or windows the mold will reappear if the water is.
There are two main factors that cause condensation.
With that said we ve learned quite a bit about white mold in our many years of mold inspection and removal.
If you re ever unsure of what type you have calling in certified professionals to perform mold testing services immediately is important.
To prevent future mold growth remove the source of moisture causing it.
