Spiders

What can you do?

Many household insecticides are effective on spiders, as most contain the same active ingredients that professional pest managers use, just in diluted strengths and smaller quantities. Insecticides belonging to the synthetic pyrethroids (SPs) group are very effective against spiders, and they also have a high safety margin. SPs include the active ingredients of bifenthrin, deltamethrin, and tetramethrin. However, the key to having a spider-free environment is safely applying treatment with enough coverage, inside and outside of your home. Often, it’s less hassle and more affordable to engage in us for regular annual treatments.

What we can do:

Anybody can kill a spider, in fact, a size 9 shoe seems to be very effective. However, having the skill and knowledge of different spider behaviours is what keeps the spider population in your home under control. Often, different species of spiders will prefer different areas of your house. For example, the Red House Spider (Nesticodes sp.) prefers your cornices, Wolf Spiders (Lycosa sp.) is a ground-dwelling spider that is attracted to your porch lights, and the Black House or Window Spider (Badumna sp.) prefers window cornices, downpipes, and your eaves line. This is why we use different residual insecticide formulations to target the different areas for different spiders. Our General Pest Treatments will cover all accessible areas spiders like to frequent within your household, including internal skirtings, garage, clothesline, balconies, external walls, carports, verandas, ceiling void, fence lines, garden shed, and even your letterbox!

Our spider treatment includes a powerful spray and dust method that eliminates existing spiders and prevents re-infestations by creating a long-lasting residual barrier.

Safe, Targeted Solutions for Australian Spider Infestations

With over 35,000 known species worldwide—and thousands native to Australia—spiders are a common sight in homes and outdoor areas. While many are harmless and even beneficial (feeding on other insects), a build-up of spiders in or around your home usually indicates it’s time for professional pest control.

What to expect after a treatment

To have fewer spiders in your Perth home, it's important to understand that an immediate 100% spider-free environment is unrealistic. Most pest controllers, including us at Coopers Pest Solutions, will tell you that even the most thorough and effective treatment can reduce your spider population by around 80-90%, but not eliminate it completely.

This happens because spiders must come into contact with the treatment chemical, and when they do, they don’t die instantly. Instead, a treated spider may become groggy and wander around for up to 12 hours before dying. Healthy spiders generally hide away, while sick spiders may be seen more easily as they roam visibly.

The duration of our treatment’s effectiveness depends on several factors: exposure to sunlight, household cleaning, foot traffic, and the surfaces the chemical bonds with. Different spider species respond differently too. For instance, ground-dwelling spiders common in Perth suburbs are more likely to contact the chemical than web-building spiders, which usually stay put in their webs.

Your home's location in Perth also influences spider activity. Homes near bushland or river areas, common around the Swan Valley or Perth Hills, often experience higher spider populations compared to those in more urban or coastal suburbs.

To maintain control over spiders around your Perth home, we recommend annual treatments. Our General Pest Treatments come with a 3-month warranty—if you’re not satisfied during this period, we will return to address the issue. This commitment reflects our dedication to keeping your home pest-free honestly, reliably, and fairly priced.

Areas We Treat

We treat your property thoroughly—inside and out:

Roof Void: A fine dust is applied throughout the roof cavity using a dusting gun.
Internal Areas: We spray along all skirting boards.
External Areas: We target all external structures including: windows, gutters, fascia, garages, sheds, pathways, weep holes, fence lines, cracks and more.

Spider Treatment Preparation Guide

Internal Prep:

  • Declutter and clean the home

  • Limit paper goods and dispose of unused cardboard

  • fish tanks etc covered

  • child’s or pet toys removed

  • pet bowls and bedding removed or covered.

  • Pets removed from the property or placed in a room that will not be treated.

External Prep:

  • Mow the lawn and tidy gardens for better access

  • Washing removed from washing line

  • All windows closed

  • Pack away children's or pet toys

  • Keep pets away from treated areas for at least 2 hours or until the product has completely dried.

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