Key 14 . Outside the door
Hampton Roads, VA
Millipedes in Hampton Roads
One soaking rain and suddenly there are two hundred coiled millipedes at the garage door. It looks like a plague. It is a drainage report.
Determination
order Diplopoda
Segmented, many-legged, and curled into a tight spiral when touched. Then read the drainage.
- Common name
- Millipedes
- Report status
- Not a WDI species
- Structural risk
- Nuisance and health
- Settled by
- Drainage reading
- Lives in
- Soil
- Field indicators
- 3 listed
Description
Millipedes are the slow, segmented, many-legged crawlers that curl into a tight spiral when touched. They do not bite or sting, and they spend their lives in damp organic matter, mulch beds, leaf litter, pine straw, and lawn thatch, eating decay. In a region of high water tables and soggy soils, with Chesapeake and Suffolk backing up to the Great Dismal Swamp, that habitat is basically everywhere.
The dramatic part is the migration. When a saturating rain floods the ground they live in, or a long dry spell parches it, millipedes move in waves, and a strip of wet mulch against the foundation can send hundreds up the wall and under the door overnight. Indoors the story ends quickly: the house is far too dry for them, and most are dead within a day or two, curled along the baseboards.
The event
How the migration runs
One soaking rain and suddenly there are two hundred coiled millipedes at the garage door. It looks like a plague. It is a drainage report.
- Normally
In the damp organic matter
They spend their lives in damp organic matter, mulch beds, leaf litter, pine straw, and lawn thatch, eating decay.
- Heavy rain
The ground floods
When a saturating rain floods the ground they live in, or a long dry spell parches it, millipedes move in waves.
- Overnight
Up the wall
A strip of wet mulch against the foundation can send hundreds up the wall and under the door overnight.
- A day or two
It ends indoors
Indoors the story ends quickly: the house is far too dry for them, and most are dead within a day or two, curled along the baseboards.
Field indicators
Evidence, in the order it is usually found
The evidence is almost always a count and a location rather than a specimen, and the location is the useful half.
- 01 Dozens to hundreds of millipedes on the foundation, patio, or garage floor after heavy rain
- 02 Curled, dried millipedes along baseboards, in the garage, or in window wells
- 03 Activity concentrated on the side of the house with mulch, downspouts, or standing water
Grade level
Where it lives in the structure
Only the bottom band is a home. The two above it are a migration route, and the top one is where it ends.
Roof and attic
Not found here
Living space
Curled, dried millipedes along baseboards, in the garage, or in window wells.
Exterior wall, trim, and deck
Dozens to hundreds on the foundation, patio, or garage floor after heavy rain.
Sill, band, and floor framing
Not found here
Crawl space
Not found here
Soil and grade
Mulch beds, leaf litter, pine straw, and lawn thatch. In a region of high water tables and soggy soils, that habitat is basically everywhere.
Consequence
What it costs to ignore
This is the shortest ledger in the library, and that is the honest answer.
To people
They do not bite or sting.
To the house
They do not damage structures or stored goods. The event is unsettling, but the risk is close to zero.
Handling
Some species release a defensive fluid that can irritate skin and stain surfaces, so sweep or vacuum them up rather than crushing them by hand.
Correction
What we do about it
A perimeter treatment knocks a migration down. Subtraction is what keeps the next one outside.
- 01 Mulch, grading, door sweeps
Subtraction, not just spray
A perimeter treatment knocks a migration down, but the durable fix with millipedes is subtraction: pull mulch and leaf litter back from the foundation, correct the grading and downspouts keeping soil saturated against the house, and tighten door sweeps and garage seals so the next wave stays outside.
- 02 Already part of the moisture work
Fix the condition, not the symptom
Drainage correction is already part of our moisture work, so we can fix the conditions instead of just the symptom, which matters in neighborhoods where the water table does half the inviting.
Not sure what you are looking at? Take a photo, save a sample if you safely can, and call 757-583-4444. Identification is the part we never charge attitude for.
See also
Related services
Answered already
Millipedes: quick answers
01 Are millipedes dangerous to my family or the house?
No. They do not bite, sting, or damage structures or stored goods. Some species release a defensive fluid that can irritate skin and stain surfaces, so sweep or vacuum them up rather than crushing them by hand. The event is unsettling, but the risk is close to zero.
End of the descent
Think you have millipedes?
Send a photo or book an inspection. We will identify what it is, what it is doing, and what fixing it actually takes.
Monday to Friday, 8 AM to 5 PM. Licensed and insured in Virginia.