Air entering the building through holes and cracks will leave dirt and dust on walls where there is exfiltration and on the insulation that covers those leaks.
Fine debris at base of siding looks like insulation dust.
These pile have been at the base of the frontdoor sidelight interior and exterior on porch.
If this material is pushed through cracks where the window frame meets the wall or along the trim board and door frames this is a sign of a subterranean termite.
Dust your body with talcum powder before you start work with fiberglass.
After that take a warm shower so that.
I discovered little pyramids of real sawdust on the driveway apron next to garage doors.
The home remedy for fiber glass dust exposure on the skin is to rinse the skin with cold water to get rid of fiberglass dust embedded on the skin surface.
It blocks the pores and prevents the entry of tiny duct particles into the skin.
For this reason subterranean termites build mud tubes along the surface of the object they feed on to insulate themselves from the dryer surrounding air.
The most common ingredients in house dust in a healthy home are.
House dust might be a contributor to building air quality complaints if the dust has high levels of problem particles such as mold dust mite fecals pollen sub micron particulate debris bacterial contaminants pet hair mouse dander or fecal dust and similar particles.
Depending on the insect frass contains chewed up wood pieces or fecal pellets that are mostly wood along with dead insects and miscellaneous debris excavated from the nest site.
I have been finding small piles of brown beads that look like coffee that has been ground very fine.
Carpenter bees chew holes in dead wood to make their nests.
An expert can usually tell which insect left the frass by looking at it under magnification.
When mold growth is on unpainted metal in an air handler it is most likely dining on organic dust and debris found on those surfaces.
Before you call in a heating cooling hvac contractor there are a few steps that you can take yourself.
I looked up and found dozens of perfectly round 3 8 holes caused by borer bees aka carpenter bees that drill into the cedar in order to lay their eggs and nourish the larvae.
In a building exposed to pressures from high stack effect warm air rising or mechanical pressures such as those from duct leakage or exhaust fans staining can sometimes occur at the carpet edge where the interior or exterior wall joins the carpet.
You will note that mold growth is present on the air handler insulation on the metal surfaces of the blower assembly on refrigerant and condensate piping and even on the paper labeling on the blower cage.
Look at your eaves door jam and possibly siding anything wood really around where the dust is accumulating.
