How Long Does a Spider Spray Last in Melbourne?

A professional spider spray isn’t a one-day fix. Done properly, it keeps working for months. But how long it lasts depends on where it’s applied, the weather and what happens to the treated surfaces afterwards. Here’s what to expect, and how to get the most out of it.

Quick Answer

A professional inside-and-outside spider treatment usually keeps spider numbers down for many months, and ours comes with a written 12-month guarantee on spider and general pest treatments, subject to our guarantee terms. Most Melbourne homes treat once a year, often in spring before spider season peaks.

What Affects How Long It Lasts

• Rain and sun: outside surfaces exposed to heavy rain and direct sun break down faster than sheltered areas like eaves and under decks.
• Cleaning and painting: washing walls, pressure-cleaning, painting or rendering removes the treatment from those surfaces.
• Gardens and leaf litter: dense plants against the house, woodpiles and clutter give spiders new places to shelter and hunt.
• Insects that spiders eat: outdoor lights attract insects, and insects attract spiders.
• Where it’s applied: a thorough treatment covers the inside, the outside and the roof void, not just a quick spray around the doors.

What a Proper Spider Treatment Includes

• Inside: skirting boards, window and door frames, corners and other areas where spiders hide
• Outside: eaves, external walls, windows, fences, sheds and garden edges
• Roof void: a dust treatment that also controls silverfish and other crawling insects

See what’s included in our spider control treatment. Ants and garden cockroaches can be covered at the same time. See ant control.

Why You Might See More Spiders After Treatment

That’s normal. The treatment flushes spiders out of hiding, so you may see more for a short time. Activity usually drops off within about two weeks.

Is It Safe for Children and Pets?

Everyone, including children, babies and pets, can come back inside 2 hours after the indoor treatment. Pregnant women and anyone with a medical condition should talk to the technician first. Fish ponds and water tanks must be covered during spraying.

Redbacks and White-Tails

Redbacks shelter in dry, sheltered spots like letterboxes, under outdoor furniture and in sheds. White-tails hunt other spiders and often wander inside. A thorough inside-and-outside treatment targets the areas both use.

How to Make Your Spider Treatment Last Longer

• Avoid washing or pressure-cleaning treated outside walls for a few months.
• Keep plants trimmed back from the house.
• Move woodpiles and clutter away from walls.
• Use yellow or LED outdoor lights, which attract fewer insects.
• Seal gaps around doors, windows and pipes.

Frequently Asked Questions

How often should I have a spider spray?

Once every 12 months suits most homes. Homes near bushland or with heavy spider activity may benefit from treating every 6 months.

What if spiders come back within the guarantee period?

Call us. Under our 12-month guarantee, we return to re-treat, subject to our terms.

Do I need to leave the house?

Yes, during the indoor treatment and for 2 hours afterwards. We usually do the outside first.

Book a Spider Treatment in Melbourne

Call 1800 38 66 55, 7 days a week, or send us your details. We’ll confirm the right treatment and price before any work starts.

Rated 4.8/5 on Google, 4.9/5 on Trustindex and 5.0/5 on hipages. Word of Mouth Service Award winner 2019–2025. Licensed pest manager (VIC licence L010931).