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7 Best Ways to Prevent Spiders in Perth Homes (2026)
Table of Contents
- 1. Seal Entry Points: The First Line of Defence
- 2. Declutter and Remove Harbourage
- 3. Manage Outdoor Vegetation and Debris
- 4. Use Natural Repellents and Deterrents
- 5. Control Lighting and Ventilation
- 6. Regular Cleaning and Web Removal
- 7. Know When to Call Professional Spider Control Services
- How to Prevent Spiders in Perth Homes: Seasonal Timing and Local Species
- What Matters Most
- Frequently Asked Questions
Last Updated: September 25, 2026
1. Seal Entry Points: The First Line of Defence
If you want to prevent spiders from getting inside, you have to close the doors they're using. Spiders don't chew through walls; they walk through the gaps you've left open. Sealing entry points is the single most effective step in any spider-proofing plan, and it's the one most homeowners skip because the gaps are hard to see.
Common gaps around windows, doors, and vents
Walk your home's perimeter and check these spots:
- Window frames: Look for cracks where the frame meets the wall, and gaps in flyscreen mesh.
- Door edges: Check the gap under exterior doors and around sliding door tracks.
- Weep holes and vents: These let air move through brickwork, but they also let spiders in.
- Roof and eaves: Loose fascia, broken tiles, and unsealed vents are common access routes.
Tools and materials for effective sealing
You don't need much to seal entry points for pest prevention. A tube of flexible gap filler handles cracks in walls and skirting boards. Weather stripping or brush seals close the gap under doors. Replacement flyscreen mesh and tight-fitting screens cover windows and vents.
2. Declutter and Remove Harbourage
Clutter is a spider hotel. Cardboard boxes, old newspapers, and stacked storage create dark, undisturbed spaces where spiders shelter and breed. Removing harbourage is less about cleaning and more about denying spiders somewhere to live.
Storage areas, sheds, and firewood
Focus on garages, sheds, roof spaces, and cupboards. Store items in sealed plastic containers rather than cardboard. Keep firewood stacked off the ground and away from the house wall, since firewood storage is a classic spider habitat. Move boxes off the floor where you can.
How to get rid of carpet beetles
Learning how to get rid of carpet beetles matters here because carpet beetles are a food source for spiders. Vacuum carpets, rugs, and skirting boards regularly, wash bedding and fabrics in hot water, and store woollens in sealed bags. Fewer carpet beetles means less spider prey.
3. Manage Outdoor Vegetation and Debris
Spiders move indoors from the garden. Trees, shrubs, and leaf litter touching the house act as a bridge straight to your walls. Vegetation clearance and debris removal create a dry, exposed buffer that spiders avoid.
4. Use Natural Repellents and Deterrents
Natural repellents won't wipe out an infestation, but they can discourage spiders from settling in specific spots. Essential oils are the most common option, and they work best as part of a broader prevention plan rather than on their own.
Essential oils and pet-safe options
Peppermint, eucalyptus, tea tree, and citrus oils are the usual choices. Spiders dislike the strong scent, so a diluted spray along skirting boards and window frames can act as a repellent.
5. Control Lighting and Ventilation
Outdoor lighting attracts the moths and flies that spiders eat, so bright white lights near doors effectively set the table for them. Swap to warm, low-intensity bulbs, or use motion sensors so lights only come on when needed. Smart bulbs let you schedule and dim outdoor lighting to cut insect attraction at night.
6. Regular Cleaning and Web Removal
Web removal is a habit, not a one-off job. Vacuum ceilings, cornices, and corners every week or two, and knock down webs as soon as you spot them. This removes egg sacs before they hatch and disrupts the spider's habitat.
7. Know When to Call Professional Spider Control Services
DIY prevention handles most routine cases, but some situations call for professional spider control services. The trick is knowing where the line sits, because treating the wrong species or the wrong scale of infestation is how people get bitten or waste money on products that don't work.
A simple DIY-versus-professional threshold
Use these questions to decide:
- What species is it? A single huntsman or common garden spider is a DIY job. Redbacks, funnel-webs, and mouse spiders carry medically significant venom and should be treated by a licensed technician.
- How many are you seeing? Occasional sightings are normal. Seeing multiple spiders of the same species over consecutive days, or finding egg sacs in several locations, suggests an established population that DIY methods will struggle to knock down.
- Where are they? Spiders near a child's play area, a pet's bedding, or a frequently used doorway raise the risk level and justify professional treatment.
- Have you already treated? If you've sealed, cleaned, and removed harbourage and still see activity after a few weeks, the source is likely outside your control (roof void, subfloor, neighbouring vegetation) and needs a professional inspection.
- Is anyone in the home at risk? Young children, elderly residents, and anyone with allergies or compromised immunity should not be exposed to DIY chemical treatments.
What professional treatment involves
A licensed pest technician will identify the species, inspect likely harbourage (roof voids, subfloors, weep holes, garden structures), and apply a targeted treatment. This may include residual sprays to treated surfaces, dusts in wall cavities and roof voids, and web removal. They will also advise on exclusion work and follow-up timing, since some treatments need reapplication to break the breeding cycle.
Safety precautions
Challenge Pest Control has delivered guaranteed pest management across the metro area since 1987, with 24/7 availability and fully insured work. We offer free quotes and pensioner discounts, and our team handles everything from general pest removal to termite inspections.
How to Prevent Spiders in Perth Homes: Seasonal Timing and Local Species
Timing your prevention work matters as much as the methods you choose. Spider activity follows the local climate cycle, and treating at the wrong time means you're working against the weather rather than with it. The table below sets out a practical maintenance calendar based on the south-west WA seasonal pattern.
| Period | Conditions | Priority actions |
|---|---|---|
| Late winter to early spring (Aug-Oct) | Warming, drying, mating activity begins | Seal entry points, remove webs and egg sacs, trim vegetation back from walls |
| Summer (Dec-Feb) | Hot, dry, peak activity | Check weep holes and vents, clear leaf litter, inspect outdoor furniture and letterboxes |
| Autumn (Mar-May) | Cooling, first rains | Re-seal gaps, clear gutters, move firewood away from walls |
| Winter (Jun-Jul) | Cool, wet, shelter-seeking | Focus on indoor harbourage, check stored clothing and bedding, improve subfloor ventilation |
Local species and what they mean for prevention
Redbacks favour dry, sheltered spots such as garden furniture, letterboxes, shed corners, and the underside of outdoor toys. They build irregular webs with a funnel retreat, so check these items before moving them and wear gloves when clearing stored materials.
Pet-safe prevention
Many essential oils are toxic to cats and dogs, particularly when concentrated or applied to surfaces pets groom or sleep on. If you have pets, avoid peppermint, eucalyptus, tea tree, and citrus oils in areas pets can reach. Instead, rely on physical exclusion (sealing, screens, door seals), regular vacuuming, and removing harbourage. If you want a chemical barrier, ask a professional about low-toxicity options registered for use in homes with pets and children, and keep pets away from treated surfaces until dry.
What Matters Most
| Prevention Method | Effort | Frequency | Best For |
|---|---|---|---|
| Seal entry points | Medium | Once, then check quarterly | Blocking access at the source |
| Declutter and remove harbourage | Medium | Monthly | Sheds, garages, storage areas |
| Manage vegetation and debris | Medium | Fortnightly | Outdoor perimeter |
| Natural repellents | Low | Weekly re-application | Indoor deterrents, pet-safe homes |
| Control lighting and ventilation | Low | Ongoing | Reducing spider food sources |
| Cleaning and web removal | Low | Weekly | Removing egg sacs and webs |
| Professional spider control | Low | As needed | Infestations and dangerous species |
Frequently Asked Questions
What is the best natural spider repellent for homes?
Peppermint oil is a popular natural repellent. Mix 10-15 drops with water in a spray bottle and apply to entry points, windowsills, and corners. Spiders dislike the strong scent. Reapply every few days. Other options include eucalyptus, lavender, and citrus oils. These are safe around pets and children when diluted. For persistent problems, combine with sealing gaps and reducing clutter.
Why are there so many spiders in my house lately?
Spiders follow their food source. An increase in flies, moths, or other insects will draw them indoors. Clutter, moisture, and easy access through gaps also contribute. In warmer months, spider activity rises as they search for mates and shelter. Removing prey insects by controlling lighting and cleaning regularly can reduce spider numbers. If you see many spiders, check for underlying insect issues.
Do professional pest control treatments stop spiders?
Professional treatments create a residual barrier that kills spiders on contact and deters them from returning. Technicians also identify and treat harbourage areas and entry points. Results last longer than DIY sprays, often several months. However, no treatment is permanent; regular maintenance is key. Choose a provider that offers guaranteed work and follow-up visits. For severe infestations, professional help is the most reliable option.
How do I keep spiders out of my bedroom?
Start by decluttering: remove piles of clothes, papers, and boxes where spiders hide. Vacuum corners, under the bed, and behind furniture weekly. Seal gaps around windows and doors with weather stripping or caulk. Use flyscreens on windows. Reduce indoor lighting at night to avoid attracting insects. If you prefer natural methods, place peppermint oil diffusers or sachets in corners. Check bedding and shake out clothes before wearing.
How often should I have my home inspected for pests?
Annual inspections are recommended for most homes. If you live in an area with high spider activity or have had past infestations, consider twice-yearly checks. Regular inspections catch early signs of spiders and other pests, preventing larger problems. A professional can also advise on seasonal risks and tailored prevention. Many pest control services offer free quotes and advice, making it easy to schedule a visit.
Preventing spiders takes steady effort, and some infestations simply outpace what DIY methods can handle. When that happens, Challenge Pest Control is ready to help. We've protected homes and businesses since 1987 with 24/7 availability, fully insured service, and all work guaranteed. Call and book today on 0422926291 for a free quote and free advice, and get your property properly protected.