How Much Does a Spider Exterminator Cost in Denver

Last updated: May 22, 2026

By Pest Control Pricing Team

How Much Does a Spider Exterminator Cost in Denver

A spider exterminator in Denver costs $100 to $400, with most homeowners paying $160 to $280 for a one-time treatment that includes perimeter spray, eave knockdown, and web removal. Quarterly plans run $100 to $150 per visit ($400 to $600 per year) and deliver more reliable control because residual sprays in the dry Front Range climate degrade in 60 to 90 days. Black widow remediation sits at the higher end, $200 to $350, because it requires a labeled dust applied inside window wells, rock retaining walls, and dark garage corners where Latrodectus hesperus actually harbors.

The numbers below come from quotes collected across Denver metro pest control companies operating in Aurora, Lakewood, Arvada, Centennial, Littleton, Westminster, Wheat Ridge, Highlands Ranch, Lone Tree, Boulder, and the foothill suburbs from Golden up to Evergreen. Pricing is broadly similar across the metro, but property type drives more variance than ZIP code does: a 4,200 square foot two-story in Highlands Ranch with two detached structures will quote roughly 40 percent higher than a 1,400 square foot ranch in central Lakewood, regardless of how aggressive the spider pressure is.

2026 Denver Spider Treatment Pricing by Service

Two-story homes cost more because eave de-webbing is the most time-intensive step in a spider service, and an exterior with full 25-foot eaves takes roughly twice as long as a single-story ranch. If the second floor has wraparound dormers or stucco eyebrows (common in Stapleton and Highlands Ranch builder spec homes), expect another $20 to $40 on top of the two-story tier.

Why Spider Treatment Costs Vary in Denver

The price spread on a Denver spider quote is driven by four mechanical factors that most homeowners do not see until the technician walks the property. Understanding them is the difference between accepting an inflated bid and pushing back on scope.

Linear feet of treatable perimeter. Residual perimeter spray is priced on linear feet, not square feet. A 2,000 square foot ranch on a corner lot may have 200 feet of foundation perimeter, while a 2,000 square foot two-story on a narrow lot may have only 120 feet. Two-story footprints are smaller at grade because vertical space replaces horizontal, which is why two-story homes can cost less to spray than a single-story of equivalent interior size. Detached garages, sheds, and pergolas all add perimeter and time.

Window well count and depth. Denver's building code (and Colorado's egress-window requirement for finished basements) means most homes built after 1985 have two to six egress window wells. Each well is a black widow harborage because the metal liner traps heat, blocks rain, and accumulates leaf litter that pillbugs and crickets colonize. A technician pulls leaf litter, sprays the well perimeter, and applies a labeled dust around the well frame. Each well adds three to five minutes and corresponding cost to the visit. A house with six wells lands $30 to $50 above one with two.

Rock-scape and xeriscape density. Front Range xeriscaping (decomposed granite, river rock borders, rock retaining walls) is the dominant landscape style west of I-25 and increasingly common east of the highway as Denver Water restricts turf. Rock provides ideal harborage because it absorbs daytime heat that black widows and wolf spiders use to thermoregulate, and the air gaps between stones are inaccessible to spray. A property with extensive rock walls or boulder accent work requires void dust application, adding $40 to $90.

Distance from arterial irrigation corridors. Spider density tracks insect density, which tracks moisture. Properties within a quarter mile of the South Platte, Cherry Creek, Bear Creek, Clear Creek, or Sand Creek corridors carry meaningfully higher web-builder pressure (orb weavers, funnel weavers, cellar spiders) because aquatic and riparian insects emerge in clouds during summer evenings. The same applies to homes adjacent to Wash Park, City Park, Sloans Lake, Cherry Creek Reservoir, and Chatfield. Expect 10 to 20 percent above metro median for one-time services in these microzones.

Black Widows on the Front Range

The Western black widow, Latrodectus hesperus, is the only medically significant spider broadly established in the Denver metro. It is present in every neighborhood from downtown to the foothill edges, and CSU Extension treats it as the primary venomous-arthropod concern in residential pest management across the Front Range.

Black widows in Denver harbor in a predictable set of microhabitats. Egress window wells top the list because the wells trap warmth, exclude precipitation, and concentrate prey insects. Rock retaining walls (especially the dry-stacked sandstone walls common in older Capitol Hill and Park Hill bungalows) provide deep cavity harborage that survives spray treatment. Detached garages, particularly those with concrete slab floors and uninsulated rim joists, are nearly universal harborage. Woodpiles, garden hose reels, BBQ grill covers, kids' plastic playhouses left outside, and rarely used patio furniture round out the list.

The bite of L. hesperus delivers alpha-latrotoxin, a neurotoxin that produces severe muscle cramping, sweating, hypertension, and intense abdominal pain that can mimic appendicitis. The Rocky Mountain Poison and Drug Center fields several hundred suspected black widow bite calls each year from the Denver metro. Most adult bites resolve with supportive care over 24 to 48 hours, but bites in children under 40 pounds, adults over 60, or anyone with cardiovascular disease can require antivenin and emergency department admission. This is the reason black widow remediation prices higher than nuisance spider work: the labeled product, application method, and follow-up protocol differ.

Professional black widow treatment at the $200 to $350 tier in Denver typically includes a microencapsulated bifenthrin perimeter spray (Talstar Professional is the most common brand), a labeled deltamethrin or cyfluthrin dust applied with a hand bellows or a Crusader-style B&G in each window well, and a void application around the rim joist of detached garages. The technician removes existing egg sacs by hand because a single L. hesperus egg sac contains 100 to 400 spiderlings. A treatment that ignores egg sacs trades a current adult population for an emerging one in 14 to 30 days.

If you confirm a black widow on your property, request that the quote line-item the dust application. Some lower-priced operators sell a "spider service" that is functionally a general pest perimeter spray with web wand work added. That product does not penetrate void harborage and will not control an established Latrodectus population.

Other Denver Spider Species You Are Likely to See

Of the 30 or so spider species commonly encountered indoors on the Front Range, only five drive the bulk of homeowner service calls. Treatment approach (and cost) varies because these species behave differently.

• Wolf spiders (Hogna and Pardosa species). Large, fast-moving, ground-hunting spiders that come indoors through gaps under garage doors and around foundation vents. They do not build webs and they do not stay in one place, which means web removal does nothing and a perimeter spray is the only effective control. Wolf spider bites cause local pain and minor swelling but no systemic effects. Most $120 to $200 one-time treatments handle wolf spider activity within two weeks.
• Yellow sac spiders (Cheiracanthium inclusum and C. mildei). Small, pale yellow spiders that build silk retreats in upper room corners, behind picture frames, and where the ceiling meets exterior walls. They are the most common indoor spider in Denver homes by a wide margin. Their bite produces a slow-healing necrotic lesion that is sometimes misdiagnosed as a brown recluse bite. Treatment requires interior crack-and-crevice work in addition to the standard perimeter, which is why infestations push pricing toward $200 to $280.
• Funnel weavers (Agelenidae, including the hobo spider Eratigena agrestis). Build distinctive sheet webs with a funnel-shaped retreat in window wells, ground-level shrubbery, woodpiles, and dense junipers. The hobo spider was historically considered medically significant; the CDC removed it from its list of venomous spiders in 2017 after further research, and CSU Extension considers Front Range hobo bites medically insignificant. Funnel weaver pressure responds well to standard perimeter spray plus shrub trimming.
• Cellar spiders (Pholcus phalangioides). Long-legged, slow-moving spiders that build messy cobweb structures in basements, crawl spaces, and detached garage corners. Cellar spiders are beneficial because they prey on black widows and other nuisance spiders. Treatment is usually limited to web removal so that the population continues providing biological control, unless the cobweb volume itself is the concern.
• Jumping spiders (Salticidae) and orb weavers (Araneidae). Both groups are highly beneficial and rarely require treatment. Jumping spiders hunt indoors near sunny windows and present no health risk. Orb weavers build the large circular webs you see between fence posts and patio columns in late summer. Knockdown during a routine quarterly visit is sufficient.

The brown recluse (Loxosceles reclusa) is not established in Colorado. CSU Extension and the Denver Museum of Nature and Science maintain that confirmed Loxosceles sightings in the metro almost always trace to specimens transported in moving boxes from Missouri, Arkansas, Oklahoma, Tennessee, or southern Illinois. Pricing a treatment around brown recluse risk is unnecessary for Denver homes that have not received recent shipments from the recluse range.

How Professional Spider Treatment Actually Works

Spider control is mechanically different from ant, cockroach, or rodent work because spiders do not groom and they do not feed on baits. Every meaningful control mechanism depends on the spider contacting a residual surface for long enough to absorb a lethal dose, or on physical disruption of the web and egg sac.

Microencapsulated pyrethroid sprays. The Denver standard for exterior perimeter work is a microencapsulated bifenthrin product (Talstar P or Talstar Professional) or a lambda-cyhalothrin product (Demand CS). Microencapsulation extends residual life by suspending the active ingredient inside polymer capsules that release slowly. On a porous Front Range stucco or sandstone facade, microencapsulated formulations hold up for 60 to 90 days in mild weather; on dark-stained cedar or composite siding facing south or west, UV degradation cuts that to 45 to 60 days. This residual decay curve is the reason quarterly plans are dosed at 90-day intervals and bi-monthly plans at 60.

Labeled void dust. Deltamethrin, cyfluthrin, and silica-based desiccant dusts (such as CimeXa) are applied with a hand duster into wall voids, window well frames, behind exterior outlet covers, into rim joist cavities, and through weep holes in brick veneer. Dust has dramatically longer residual life than spray (12 months or more in undisturbed voids) because there is no UV, no rain, and no surface microbial activity to break it down. This is the active that actually controls black widow populations long-term.

Web wand and pole de-webbing. A 22-foot fiberglass pole with a microfiber head physically removes webs, egg sacs, and the spiders inside them. Web removal serves two functions: it eliminates the next generation (a single egg sac can release hundreds of spiderlings), and it forces surviving spiders to rebuild webs across treated surfaces, increasing residual exposure. The de-webbing pass is usually 20 to 40 percent of a Denver spider service ticket by labor time.

Habitat modification. A technician who is doing the job well spends the last 10 minutes of the visit walking the property with the homeowner and identifying conditions that drive the spider population: exterior lights that draw insect prey, junipers and yews planted against the foundation, leaf debris in window wells, and clutter against the garage perimeter. The cost of a recommendation is zero; acting on the recommendation can drop subsequent service tickets by 25 percent.

Seasonal Pricing Patterns and Service Demand

Denver spider service demand is sharply seasonal, and so is pricing. Companies discount during shoulder seasons and run waitlists from late August through October.

• Spring (March through May). Overwintered egg sacs hatch as soil temperatures hit the low 50s, typically in late April along the Front Range. Outdoor spider activity climbs but indoor sightings remain low. This is the best window to start a quarterly plan because the first visit knocks down the emerging generation before it establishes. Spring quotes often include a 10 to 15 percent first-visit discount in March and early April.
• Summer (June through August). Peak outdoor activity coincides with peak irrigation, which concentrates flying insect prey near homes. Orb weavers, funnel weavers, and black widows are all most active in July and August. Service demand is steady but not stressed; pricing is at metro median. Summer is also when bite incidents peak because outdoor furniture, garden gloves, and kids' playhouses see the most use.
• Fall (September through November). The first cold snap (typically the last week of September on the Front Range) triggers a wave of indoor spider sightings as males search for mates and outdoor populations seek thermal refuge. Service demand spikes 200 to 300 percent above summer levels. Quarterly customers usually get on the books before non-plan customers. One-time treatment quotes can run 10 to 15 percent above summer pricing through October. This is the season homeowners regret not starting a plan in spring.
• Winter (December through February). Outdoor populations are dormant. Indoor activity continues, especially yellow sac spiders in heated upper-floor corners and cellar spiders in basements. Service demand is at its annual low, and most companies will accept new quarterly plans with a heavily discounted first visit ($65 to $95) as a relationship starter.

The strategic implication is simple: if you can plan ahead, start service in March or November. If you call in September because you walked into a web at the back door, expect to pay the seasonal premium and possibly wait two to three weeks for your first appointment.

One-Time Treatment vs Quarterly Plan: A Decision Framework

The most common question Denver homeowners ask is whether to pay $180 once or commit to $500 a year. The math depends on three variables.

If you experience two consecutive years of fall indoor spider activity, the quarterly plan is the cheaper option on a three-year horizon because individual one-time services in October run $25 to $50 above plan-visit pricing and you typically need two of them to break the cycle. The quarterly plan also covers free re-service between visits, which removes the price friction that causes homeowners to tolerate worsening conditions.

What Each Price Tier Actually Includes

Denver spider services cluster into three pricing tiers that map to distinct scope levels. Knowing the tier you are getting prevents surprises at the door.

Budget tier, $100 to $150 per visit. Standard perimeter spray to roughly six feet of vertical reach, ground-level web knockdown, no eave work above standard ladder height, no interior treatment, no void dust. Suitable for a small ranch or townhome with no detached structures and no confirmed black widow. Often the entry point for quarterly plans, with scope expanding on later visits.

Standard tier, $150 to $250 per visit. Full 25-foot eave de-webbing with pole, perimeter spray with microencapsulated formulation, foundation crack treatment, garage interior perimeter, basic window well treatment, two- to four-room interior crack-and-crevice as needed. This is the tier the majority of Denver homeowners actually receive and what most quarterly and bi-monthly plans deliver per visit.

Comprehensive tier, $250 to $400 per visit. Everything in the standard tier plus labeled void dust in all window wells, rock walls, woodpiles, and detached structures; rim-joist treatment in any uninsulated cavity space; whole-home interior crack-and-crevice; a 14- to 30-day follow-up visit at no additional charge to address the second hatch. This is the right tier for confirmed black widow populations, post-incident remediation after a bite, or pre-sale real estate cleanouts where a clean inspection is required.

When you collect quotes, ask the operator to specify which tier their quoted price corresponds to. Two quotes at $180 can describe completely different services if one is budget-tier with extras added and the other is standard-tier flat. The Colorado Department of Agriculture does not require scope-of-work disclosure on residential pest contracts, so the burden falls on the homeowner to ask.

Spider Pressure by Denver Neighborhood

Spider pressure across the metro is not uniform. Property age, landscape type, proximity to open space, and microclimate combine to create predictable hotspots.

• Foothill suburbs (Golden, Genesee, Evergreen, Conifer, Morrison, west Lakewood). Highest black widow pressure in the metro. The transition from prairie to montane shrubland concentrates Latrodectus harborage in rock outcrops, woodpiles, and outbuildings. Properties bordering open space (Lookout Mountain, North Table Mountain, Mount Falcon, Apex Park) often need comprehensive-tier service to control black widow populations that re-colonize from adjacent undeveloped land. Expect $250 to $400 for an initial service.
• Central Denver bungalows (Capitol Hill, Park Hill, Washington Park, Berkeley, Highlands, Sloans Lake). Pre-1940 housing stock with sandstone foundations, stone retaining walls, and original wood window frames provides abundant harborage. Mature trees and shaded yards favor cellar spiders, funnel weavers, and yellow sac spiders. Black widow pressure is moderate. Standard-tier service at $150 to $220 is usually sufficient.
• New-build suburbs (Highlands Ranch, Lone Tree, Castle Pines, Inverness, Stapleton, Reunion). Modern subdivisions with rock-mulch xeriscaping, deep egress window wells, and minimal mature vegetation. Spider pressure is moderate but window-well harborage is high. Standard-tier service at $160 to $240 with attention to wells is the norm.
• Aurora and Centennial subdivisions. Mixed housing stock with significant yellow sac spider pressure in two-story homes. Most homes need standard-tier service. Properties near the Cherry Creek State Park boundary see elevated funnel weaver and orb weaver activity in summer.
• Cherry Creek and Glendale. Dense landscaping with extensive irrigation drives high web-builder populations. Black widow pressure is lower than the foothills but indoor cellar spider and yellow sac spider sightings are above metro median. Standard-tier service at $170 to $260 fits most properties.
• North Denver (Berkeley, Sunnyside, Globeville, Elyria-Swansea). Mix of older homes and industrial-adjacent parcels. Spider pressure varies block by block; properties backing to the South Platte corridor carry the highest pressure. Service quotes track standard tier.
• Boulder and the BoCo line (Boulder, Louisville, Lafayette, Erie, Superior). Foothill-adjacent properties carry foothill-level black widow pressure. Boulder city limits restrict certain pyrethroid applications inside watershed buffer zones, which can constrain product choice and push pricing 10 to 15 percent above metro median.

Real Cost Scenarios from Denver Homeowners

Specific cases illustrate how the variables above compound into a real invoice.

Scenario 1: Lakewood ranch, confirmed black widow in attached garage. A 1,650 square foot single-story near Bear Creek with two window wells, a detached shed, and a wood-stacked area along the south fence. The homeowner saw a black widow on the garage door track in late August and called for service. The technician confirmed two adult females and four egg sacs in the garage rim joist. Initial comprehensive-tier service was $295, including bifenthrin perimeter spray, deltamethrin dust in the garage rim joist and both window wells, web and egg sac removal, and a 21-day follow-up visit. Total first-year cost with two follow-ups: $295 plus $75 second follow-up = $370. The homeowner enrolled in a $480-per-year quarterly plan starting the following spring.

Scenario 2: Highlands Ranch two-story, quarterly plan, no specific concern. A 3,400 square foot two-story with six window wells, attached three-car garage, and standard rock-mulch xeriscape. The homeowner started a quarterly plan in March to address general spider activity and an emerging cricket population. First visit was $145 (discounted initial); subsequent three visits were $115 each. Total year one cost: $145 + $345 = $490. The plan included no-cost re-treatment between visits, which the homeowner used once in October. Year two cost was $460 with no first-visit discount.

Scenario 3: Capitol Hill 1908 bungalow, cellar spiders and yellow sac spiders. An 1,800 square foot historic single-family with sandstone foundation, original wood windows, and a partial basement. The homeowner wanted yellow sac spider control in the upstairs bedrooms without disturbing the existing cellar spider population in the basement. The technician quoted a single one-time service at $185, applying standard-tier perimeter spray and interior crack-and-crevice in the second-floor bedrooms and bathroom only. Basement was left untreated by request. Result was 80 percent reduction in yellow sac sightings within three weeks. The homeowner declined ongoing service.

Scenario 4: Aurora townhome, funnel weavers in two ground-floor window wells. A 1,400 square foot townhome with two egress wells, no garage, and minimal landscaping. The homeowner called after seeing funnel webs filling both wells. Budget-tier one-time service at $135 included well cleanout, perimeter spray, and ground-level web removal. The technician recommended pulling leaf litter monthly and installing acrylic well covers (homeowner cost roughly $75 each at any Denver hardware retailer). No follow-up service was needed.

Scenario 5: Evergreen mountain property, recurring black widow with two young children. A 2,800 square foot home at 7,400 feet elevation on a one-acre wooded lot with stone retaining walls and a detached two-car garage. The homeowner discovered a black widow in the kids' outdoor playhouse. Comprehensive-tier service was $385 plus a $95 follow-up at 21 days. The homeowner enrolled in a bi-monthly plan ($110 per visit, six visits per year) for ongoing pressure management. Year one total including initial: $385 + $95 + (4 visits at $110) = $920. Subsequent years run roughly $660.

DIY Limits and When to Call a Pro

Big-box stores along the Front Range stock several products that mirror professional formulations at hardware-store prices. Ortho Home Defense (bifenthrin at 0.05 percent), Spectracide Triazicide (gamma-cyhalothrin), and Talstar P concentrate (the same active and brand as professional Talstar at 7.9 percent bifenthrin) are all available without a license in Colorado.

DIY spider control runs $30 to $150 in product for a season and works reasonably well for low-pressure situations on small properties. The places it consistently fails in Denver are predictable.

• Window wells. Spraying down into a well from above misses the underside of the well rim and the metal-to-foundation seal where black widows actually live. Professional application uses a hand bellows dust angled into the rim cavity. Without that, perimeter spray controls surface spiders but not the harborage population.
• Two-story eaves. Most homeowners do not own a 22-foot fiberglass extension pole with a microfiber head. Spraying eaves from a ladder is slow, unsafe on steep Front Range lots, and tends to over-apply product near windows where it can damage glass seals.
• Rim joist and wall voids. Hardware-store products are formulated for surface application, not void injection. The deltamethrin dust used by professionals (DeltaDust, Tempo Dust) is not sold to consumers in Colorado.
• Established black widow populations. If you have confirmed adult Latrodectus in or around the home, especially with children, elderly residents, or anyone with cardiovascular conditions present, professional service is the correct call. The risk-cost math favors a $250 service over a $500 emergency department visit.

DIY works best as maintenance after a professional initial service. A homeowner who pays $295 for comprehensive-tier service in April and then re-applies a $35 bottle of Ortho Home Defense in July and October typically holds the population through the entire season for roughly $370. That hybrid approach is the strongest cost-effective protocol for Denver mid-pressure properties.

How to Hire a Spider Exterminator in Denver

Colorado regulates structural pest control through the Colorado Department of Agriculture, Division of Plant Industry. Any company applying pesticides for hire must hold a CDA-issued commercial pesticide applicator business license and employ at least one Qualified Supervisor certified in Category 100 (general structural) or Category 102 (interior/exterior structural). The Colorado Pest Control Association maintains an industry directory and a code of ethics that responsible operators sign.

Before signing a service agreement, verify the following five items.

1. CDA license number. Ask for the business's commercial applicator license number and the Qualified Supervisor's individual certificate number. Verify both on the CDA Division of Plant Industry online lookup. An unlicensed operator who damages your property is uninsured and unrecoverable.
2. QualityPro or GreenPro certification. Both certifications are administered by the National Pest Management Association (NPMA). QualityPro is the broad professional credential; GreenPro signals an integrated pest management (IPM) approach that minimizes chemical inputs. Neither is required but both correlate with quote accuracy and follow-through.
3. Written scope of work. The estimate must list specific actives (bifenthrin, deltamethrin, lambda-cyhalothrin), application methods (perimeter spray, void dust, web wand), and zones treated (perimeter, eaves, window wells, garage, rim joist). A quote that says only "spider treatment, $200" is not a contract you can enforce.
4. Re-treatment policy. Quarterly plans should include no-cost re-treatment between visits. One-time services should include a 30-day re-treatment if activity persists. The exact language matters; some operators define "re-treatment" narrowly enough that it does not apply to most callbacks.
5. Insurance. Request a certificate of insurance showing commercial general liability of at least $1 million per occurrence. The CDA does not require pesticide-application coverage at a specific level, so this is the homeowner's protection if a product application damages landscaping, stains siding, or causes a reaction.

For broader vetting criteria across pest control providers, see our guide to selecting a top-rated pest control company. For seasonal timing strategy across pest types, the best time of year for pest control guide covers when to schedule each major service category.

Spider Prevention That Lowers Treatment Cost

Habitat modification is the single highest-leverage intervention a Denver homeowner can make. Most operators will not lower their per-visit price based on prevention work, but they will reduce the scope of work, which reduces the number of visits you need and the tier you require.

Exterior lighting. White and blue-spectrum LEDs are the strongest insect attractants. Replacing exterior fixtures with amber-spectrum LEDs (Kelvin temperature 2200K or lower, or true "bug light" amber) reduces the moth, midge, and beetle population around the home by 50 to 70 percent. Spiders follow their prey. This single change can drop spider pressure to a level where bi-monthly service becomes quarterly, saving $200 a year.

Foundation vegetation clearance. Junipers, yews, boxwood, and ornamental grasses planted within 18 inches of the foundation create permanent harborage and block residual spray from reaching the foundation surface. Pulling foundation plantings back to 18 to 24 inches improves spray penetration and reduces spider survival between treatments. Mulch should be wood chip or stone, not shredded bark (which holds moisture and harbors insects).

Window well covers. Acrylic egress-rated well covers (roughly $60 to $120 each at Home Depot, Lowe's, or any Denver fence supplier) seal the well from leaf litter and reduce harborage by 80 percent or more. Colorado building code requires egress-rated covers if the well serves a bedroom window; pin-locked acrylic covers meet the code while excluding spiders. This is the single most impactful prevention step for black widow control on properties with multiple wells.

Sealing entry points. Spiders enter homes through the same gaps that mice and crickets use: under garage doors, around dryer vents, through utility penetrations, and along damaged weatherstripping. A weekend sealing pass with copper mesh, exterior-grade silicone, and replacement garage door bottom seal ($35 to $80 in materials) closes the most-used routes. Yellow sac spider indoor populations respond particularly well to entry-point sealing.

Storage hygiene. Cardboard boxes stored against garage walls and basement perimeters are favored harborage for yellow sac spiders, wolf spiders, and cellar spiders in Denver, and for brown recluse in metros further east where the species is endemic (see spider exterminator pricing in Kansas City for the brown recluse cost picture). Replacing cardboard with sealed plastic storage tubs and pulling stored items 12 inches off the wall removes the harborage. Wood firewood should be stored at least 20 feet from the structure and at least 6 inches off the ground on a metal rack.

Outdoor furniture and equipment. Patio furniture, BBQ grill covers, kids' playhouses, garden hose reels, and rarely used garage corners are all black widow harborage in Denver. A monthly inspection during the warm season (a flashlight under furniture, gloves on, shake before lifting) catches harborage before it becomes a population. Items stored outdoors over winter should be inspected aggressively before first use in spring.

Frequently Asked Questions