Cellar spiders are among the most frequently observed spiders in basements, cellars, garages, and infrequently visited spaces in Quebec residences.
In Gatineau, Val-des-Monts, Cantley, Chelsea, and throughout the Outaouais region, they are easily recognizable by their very long legs and disorganized webs that accumulate in ceiling corners, around windows, or in storage spaces.
Although they may impress some people due to their distinctive appearance, cellar spiders are generally harmless and even play a useful role in controlling various pest insects.
How can you identify a cellar spider?
The cellar spider is one of the easiest spider species to identify.
Key characteristics include:
- A very small body, typically 5 to 10 mm in length;
- Extremely long, thin legs;
- Pale beige to light brown coloration;
- Slow movement when walking;
- Irregular, messy-looking webs.
They are commonly found:
- In basements;
- In cellars;
- In garages;
- In crawl spaces;
- In sheds;
- In dimly lit corners of the home.
When threatened, they often rapidly vibrate their webs, making themselves more difficult to see.
Why do cellar spiders live in your home?
Cellar spiders primarily seek environments that are:
- Quiet;
- Humid;
- Undisturbed;
- Relatively stable in temperature.
Basements and cellars often provide ideal conditions for their development.
They typically settle where they can easily capture prey, including:
- Flies;
- Gnats;
- Mosquitoes;
- Winged ants;
- Other spiders;
- Various small insects.
The presence of insects inside the home is therefore often the main attraction factor.
Are cellar spiders dangerous?
No. Cellar spiders are considered harmless to humans.
Despite some popular urban legends, they do not pose a threat to the occupants of a home.
They:
- Do not damage buildings;
- Do not chew building materials;
- Do not transmit diseases;
- Do not attack humans.
Bites are extremely rare and generally occur only when a spider is directly handled.
In fact, cellar spiders often help reduce populations of nuisance insects inside the home.
Some species of cellar spiders are even known to capture and consume other spiders.
Why does the problem keep coming back?
Cellar spiders generally establish themselves where conditions are favourable.
When the following factors remain present, their population may persist:
- A regular supply of insects;
- Low-traffic areas;
- High humidity;
- Accumulations of old webs;
- Easy access from outdoors.
Even after visible spiders are removed, others may move in if the conditions attracting them remain unchanged.
What should you do if you have cellar spiders in your home?
In most situations, a few simple measures can help reduce their presence:
- Remove webs regularly;
- Vacuum corners, ceilings, and storage areas;
- Reduce insect populations within the home;
- Control excessive humidity;
- Seal cracks and entry points.
Proper ventilation in basements and storage areas can also help make the environment less favourable for their establishment.
When their presence becomes significant or recurring, an inspection can help identify the factors contributing to their proliferation.
Our solution
At Maranda Pest Control, we take a preventive approach focused on reducing the causes of spider activity rather than simply eliminating visible individuals.
Our inspection allows us to:
- Identify the species present;
- Assess activity levels;
- Locate areas that encourage spider activity;
- Identify potential entry points;
- Recommend appropriate corrective measures.
Depending on the situation, various measures can be implemented to reduce insect populations that serve as food sources and limit spider access to the building.
We also provide recommendations tailored to your property to help reduce the risk of future infestations.
Need help with a cellar spider problem?
Whether you are in Gatineau, Val-des-Monts, Cantley, Chelsea, L’Ange-Gardien, or anywhere in the Outaouais region, our team can help you identify the spiders present and implement effective solutions to reduce their presence.
Contact Maranda Pest Control for a professional inspection and reclaim a cleaner, more pleasant basement, garage, or cellar.
