Wasps Nesting in Eavestroughs in Barrhaven — What to Do

Wasps nesting inside eavestroughs is a common warm-season issue in Barrhaven and other suburban Ottawa neighbourhoods, and addressing it promptly protects both your family and your gutter system. Wasp nests inside eavestroughs block water flow, cause overflow, and create a genuine safety hazard for anyone performing maintenance or cleaning.

Safely Removing Wasp Nests From Your Eavestroughs

The safest approach depends on the nest size and species. Paper wasps build small, open-celled nests that are relatively easy to deal with when they are still small — typically in June or early July. Yellow jackets build enclosed nests that can grow rapidly and become aggressive by August. If the nest is larger than a golf ball or you are allergic to stings, call a licensed pest control professional rather than attempting removal yourself. In Barrhaven, pest removal typically costs $150 to $350 depending on accessibility and nest size.

For small, early-season paper wasp nests that you can safely reach on a single-storey home, wait until dusk when wasps are least active and use a commercial wasp spray rated for outdoor use. Spray from a distance of at least two metres, following the product instructions. Wear long sleeves, gloves, and eye protection. Never attempt nest removal from a ladder on a two-storey home — the risk of falling while reacting to stings is serious.

Once the nest is removed, clean out the eavestrough section thoroughly. Wasps choose eavestroughs because they offer shelter and proximity to standing water — both signs that your gutters may not be draining properly. Check the slope of the affected section to ensure water flows toward the downspout rather than pooling. Standing water in eavestroughs attracts wasps, mosquitoes, and other pests throughout Ottawa's warm season from May through September.

To prevent future nesting, consider installing gutter guards or mesh screens over your eavestroughs. Guards running $10 to $25 per linear foot installed not only keep leaves out but eliminate the sheltered spaces wasps prefer. Some Barrhaven homeowners also apply a light coat of cooking spray or WD-40 along the inside eavestrough lip in spring, which discourages nest attachment — though this is a temporary measure that washes away with rain.

Twice-annual eavestrough cleaning — once in late spring after pollen season and once in late fall after leaf drop — is the best long-term prevention. Clean, properly flowing eavestroughs with no debris buildup are far less attractive to nesting insects. A seasonal cleaning package from a professional runs $250 to $600 annually in the Ottawa market. You can browse eavestrough and gutter professionals through the Ottawa Construction Network directory at justynrookcontracting.com to find someone who can handle both cleaning and guard installation.