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Mold Image Gallery

(click on thumbnail images for a larger view)

Example # 1
Pictures of mold along a baseboard.
This house had mold growth on the baseboards in two bedrooms.
01a 01b 01c 01d 01e
At first glance it appears that the mold may be due to flooding from a waterbed or from the adjacent bathroom. The source of moisture intrusion was actually through the exterior wall. Bermuda grass had grown up through the weep screed of the house, clogging it. The grass had also torn most of the moisture paper along the base of the wall. These problems, combined with the presence of some cracks in the exterior stucco and poor grading problems in the yard, allowed moisture easy access to the interior wall spaces where mold proliferated. Although mold was not visible on the sheet rock from inside the room, the paper backing of the sheet rock was covered with mold growth to about 2-feet high.


Example # 2
This picture was taken inside an attic.

02 The mold is very black and, at first sight, looks a lot like Stachybotrys. The attic was very dry, though, and had no history of water intrusion. A swab sample of the mold was collected, which reported the Ceratocystis/ Ophiostoma mold group. This mold is a plant pathogen and is often found in lumber yards and on commercial wood. One Ophiostoma species is the cause of Dutch Elm Disease. There is no evidence that the mold produces any toxin or is hazardous to animals or humans.


Example # 3
Picture of an exterior wall in a condominium.

03a There is some mold growth along the base of the wall and evidence of water damage. This wall had two layers of sheet rock on it. 03b When the first layer of sheet rock was removed, a large amount of mold growth was found on the paper backing of the sheet rock. 03c The brown paper backing on sheet rock is an excellent food source for mold. The extent of this mold growth was not visible until the sheet rock had been removed. Mold growth that is visible on sheet rock is often much worse inside wall spaces.


Example # 4
Mold growth on sheet rock beneath the paint.
04c Picture of the same wall with all of the sheet rock on the wall of this room removed. This is the view of the back of the wall of the next room. The cause of the mold growth was a long term roof leak that allowed water into the wall cavity where warm, stagnant air allowed mold to proliferate. 04a 04b


Example # 5
Picture of the roof of room addition to a house.

05a 05b The roof is not sloped and water pools at the joint between the roof and the original side of the house. This water then migrated down the wall space of the addition causing mold growth in the wall space and under the carpet. The sheet rock does not have any significant staining or signs of mold, but mold growth was found on the back of the sheet rock and on the wood siding to the original house. The mold under the carpet was not visible until the carpet was pulled back.


Example # 6
Mold growth behind wallpaper.

06 Mold can easily grow undetected behind wallpaper that has been exposed to moisture. The mold can feed on the wallpaper material as well as the organic glues used to apply the paper. The cause of moisture in this room was poor drainage that resulted in water accumulation under the crawl space, which lead to high humidity inside the room. This same type of growth may develop in wallpaper bathrooms that are not well ventilated.


Example # 7
Photograph of a slab foundation that has an elevated Moisture Vapor Emission Rate (MVER).

07 While some movement of moisture vapor through the pores in a slab foundation is normal, poor drainage conditions around a house or improper construction of the slab foundation can lead to elevated MVER's. This can cause failing of wood or linoleum flooring and lead to widespread mold growth under carpeting and in carpet padding.


Example # 8
Mold growth in an abandoned apartment complex.
When buildings are left vacant for extended periods, relative humidity levels increase significantly. When relative humidity levels are high, the air itself becomes a moisture source and mold can start to grow on any organic surface.

08a 08b


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