How do Ottawa painters deal with wasps nests behind siding during exterior paint jobs?

Wasps nests behind siding are a genuinely common problem on Ottawa exterior paint jobs, particularly on older homes in neighbourhoods like Barrhaven, Kanata, and Manotick where wood siding and soffit gaps have had years to develop entry points. The standard approach is to deal with the nest before any paint or prep work begins — never try to paint around an active nest or seal entry points while wasps are still inside.

The typical sequence a professional Ottawa painter follows starts with identifying all entry and exit points during the initial site assessment, usually done in the morning when wasps are less active. If a nest is confirmed, work on that section gets paused and the homeowner is advised to either hire a pest control company or treat the nest themselves using a foam or powder wasp killer applied at dusk when the colony is inside and sluggish. Products like Raid Wasp Foam or Wilson One-Shot are available at Ottawa Home Depot and Canadian Tire locations and work well for accessible nests. After treatment, you typically wait 48 to 72 hours before disturbing the area.

Once the colony is eliminated, the painter removes the dead nest material — leaving it in place can attract other insects and holds moisture against the wood. The entry points in the siding, soffit, or fascia are then sealed with paintable exterior caulk ($8 to $15 per tube) or, if the gap is larger, with backer rod and caulk or a wood patch before priming and painting. This sealing step is critical in Ottawa because open gaps that survive winter allow freeze-thaw water infiltration that will destroy your new paint job within a season or two.

One important warning: never seal an entry point while wasps are still active inside. Trapped wasps will chew through drywall, insulation, or interior wood to find a new exit — sometimes emerging inside the house. This is more common than people expect on Ottawa homes with older wood-framed soffits.

The timing of your exterior paint project matters here too. Ottawa's prime wasp season runs from July through September, which unfortunately overlaps with the best exterior painting weather. Scheduling exterior work for late May through June reduces the likelihood of encountering active nests at full colony strength.

If you're planning an exterior project and want a painter who knows how to assess and sequence around pest issues, you can browse painting contractors through the Ottawa Construction Network directory at justynrookcontracting.com/directory.