Spiders
Araneae
Mostly beneficial — but heavy webs and dangerous species need control.
Most spiders are harmless and beneficial, but heavy infestations can be alarming and a few US species deliver medically significant bites.
At a glance
- Category
- arachnid
- Seasonal activity
- Peak: Late summer and fall as spiders seek mates and shelter.
- Life cycle
- Most species live 1–2 years; egg sacs contain dozens to hundreds of spiderlings.
- Common locations
- Basements · Garages · Attics · Crawlspaces · Corners of ceilings
Entity relationships
Parent entity
Child entities
Related entities
Key attributes
Risk profile
A quick read on how this pest scores across the four factors that matter most.
- Health risk
- Low
- Property damage
- None
- Spread potential
- Low
- Treatment difficulty
- Low
Seasonal activity
When this pest is most active across the calendar year.
Identification & habitat
Confirm what you're dealing with before choosing a treatment path.
How to identify
- Two body regions and eight legs
- Silk webs in corners, eaves, and voids
- Egg sacs stuck to surfaces
Where they live
- Basements
- Garages
- Attics
- Crawlspaces
- Exterior eaves
Signs of infestation
- Visible webs in corners
- Egg sacs
- Live sightings at night
Behavior
- Ambush or web-hunt prey
- Solitary except during mating
- Peak population late summer / fall
Reproduction
Most species live 1–2 years; egg sacs contain dozens to hundreds of spiderlings.
Life cycle timeline
Every treatment plan must reach every stage — miss one, and the population rebuilds.
- Stage 12–6 weeks
Egg sac
Dozens to hundreds of eggs inside silk sac.
- Stage 21–3 months
Spiderling
Balloons or crawls to disperse.
- Stage 31–2 years
Adult
Reaches full size and reproduces.
Health risks
- Painful bites (widow, recluse)
- Rare allergic reactions
Property damage
- Unsightly webs
Inspection checklist
- Sweep eaves and window frames monthly
- Reduce clutter in garages and sheds
- Change exterior bulbs to yellow LED
- Seal cracks and install door sweeps
Professional treatment
The proven, licensed protocol our specialists use in the field.
- 1
Web knockdown
Remove active webs so residuals reach surfaces.
- 2
Perimeter residual + eave treatment
Suppress web-building around structure.
- 3
Void dusting
Long-residual dust in wall voids and crawl spaces.
- 4
Insect reduction
Cutting off prey base reduces spider pressure.
You can handle
- Sweep webs and vacuum egg sacs
- Reduce garage clutter
- Manage insect prey with lighting choices
Get professional help
- Widow or recluse presence
- Heavy exterior webbing
- Family members with severe arachnophobia
What changes the price
- Property size
- Perimeter foliage
- Presence of medically important species
Prevention
Small habits keep spiders from coming back after treatment.
Prevent spiders
- Reduce clutter in storage areas
- Seal cracks and install door sweeps
- Change exterior bulbs to yellow to attract fewer insect prey
Common myths
Bad advice makes infestations worse — here's the truth.
Most spiders bite people.
Nearly all US spiders avoid humans and cannot puncture skin.
Every brown spider is a brown recluse.
True recluse range is limited to the south-central US and requires specific ID markers.
Frequently asked
Answers to the questions homeowners ask most about spiders.
Should I kill spiders I see indoors?
Non-medically-important spiders eat many pest insects — capture and release outside when possible.
Do essential oils repel spiders?
Peppermint oil has short-term deterrence but doesn't replace proper exclusion.
Call a pro immediately if…
- Confirmed widow or recluse presence
- Heavy web pressure on exterior
- Children or elderly residents with bite risk
Answer your next question
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