Proactive treatment is key to maintaining control of spider populations on your property, so when the spider activity becomes unmanageable it may be time to seek professional spider extermination services.

CALL 303-683-9283 to schedule your spider treatment TODAY! 

 Our team of experts is ready to offer solutions that meet your needs. We can bring you peace of mind by thoroughly treating common spider breeding areas inside and outside of your home – whether it is a one-time spider extermination treatment, a spider control maintenance plan, or cleanup services to remove cobwebs & egg sacs on the exterior of your home.  Don’t let spiders take over your home… let us eliminate what’s bugging you!


Colorado is home to many different types of spiders – garden, house and poisonous.

Among the most common indoor spiders are funnel web spiders, cobweb spiders, cellar spiders and sac spiders. All of these spiders (except for the sac spiders who are active hunters) build webs to ensnare their prey. Infestations often occur in dark, moist areas that provide limited human disturbance – garage areas, basements and crawlspaces are examples of ideal indoor habitats.

Outside the home you may spot wolf spiders, orb weavers/banded garden spiders, and ground spiders. Typically these spiders remain outdoor but can venture indoors during periods of cooler weather, when their exterior habitat is altered, or to hunt for food.

While none of the spiders mentioned above are considered harmful to humans, large populations can become a nuisance. Some species may bite when threatened and that can cause a painful allergic reaction in certain individuals. If you are experiencing spider activity, you may want to get professional assistance – especially if you spot either of the poisonous spiders mentioned below.


Black widow spider that is spinning its web

Western Black Widow Spiders

It is important to note that Colorado is home to the poisonous Western Black Widow. Mature females are typically black in color and have a distinct “hourglass” marking on the underside of a bulb shaped abdomen. The males have more variation in color and a longer abdomen. Females typically spin cobwebs in dark corners or holes near the ground. They have also been know to use rodent burrows, wood piles, well houses, electrical boxes or other secluded areas as a place to live.

Though the spiders are not typically aggressive, they will bite if disturbed. Neurotoxins in the venom can cause muscle or chest pain, abdominal discomfort, swelling of the extremities, anxiety, restlessness, or difficulty breathing and speaking. If you have been bitten and are experiencing any discomfort contact your physician or other health professionals.

Brown Recluse Spiders

Brown Recluse spider bites are also poisonous to humans. Thankfully Brown Recluse spiders are rare in Colorado. The spider’s common habitat includes the mid-western and south-central states. Brown Recluse spiders can be brought into Colorado from the common habitat regions, but rarely survive. The Denver Museum of Nature and Science can identify any suspected Brown Recluse specimen.

Brown recluse resting on cardboard

**For more information regarding common spiders in Colorado, visit Colorado State University’s article “Spiders in the Home”.


Reproductive patterns will very between species, but most spiders in Colorado breed and lay their eggs between May-Sept each year. Spider sightings often increase during this season as males and females participate in mating rituals. Once fertilization has occurred, the female spider can lay dozens of eggs in protected egg sacs. The egg sacs may hatch and spiderlings emerge within a few weeks to months of when they are laid.

Life span can also vary by specie, but most spiders in Colorado can live between 1-3 years. This means that while spiders may be less active during the colder winter months they do not die. They will remain indoors or protected cracks/crevices along the exterior of the home and emerge when it is warm. Since the Denver Metro area is fortunate enough to have ample sunshine and warm weather during the winter, spiders don’t have an “off” season.


Spiders are an important part of our ecosystem as they can provide control for other species of insects, but large populations can become alarming. There are several things you can do to limit spider activity on your property and maintain manageable spider presence.

  1. Make Habitat Modifications: 
    • Eliminate brush or debris along the exterior structure of your home to limit spider habitat.
    • Keep vegetation trimmed away from the exterior wall of your home – especially vines or thick foliage.
    • Store firewood away from the structure of your home as spiders love to build webs in the spaces between logs.
    • Keep interior areas clean – vacuum corners regularly, limit clutter, etc.
  2. Repair Possible Entry Points: 
    • Check door and window seals to ensure they are functioning properly and caulk any visible cracks/openings into the home. Please note that this will not completely eliminate a spiders ability to enter your home, but it can limit their ease of access.
  3. Get Professional Spider Control
    • Schedule regular pest maintenance along the perimeter of your home to limit spider activity.