Wasps · Prevention

Calgary and area · Fully licensed and insured

Stop wasps nesting in your soffits next year

To stop wasps nesting in your soffits next year, close the gaps they use before spring queens pick a site. We find and seal soffit, vent and siding gaps on Calgary homes. Fully licensed and insured. Wasp prevention from $234 + GST; written quote after inspection.

How it happens

Queens that survived winter come out in spring looking for a sheltered cavity. Soffit gaps, unscreened vents and loose siding give them one. Calgary’s Chinook swings can take a wall through several freeze-thaw cycles in one winter, and each cycle works sealant and trim joints loose. A joint that was tight in July can be open by February.

Calgary timing

• Fall to early spring: seal. No nest activity, safe ladder work.
• Spring as it warms: queens search for sites. Watch the soffits.
• Summer: colonies grow. Do not DIY an active nest.

Prevention, not removal

This page is about sealing before nesting starts. Active nests are a separate job and are assessed at inspection. Do not seal an opening that wasps are using; they will look for another way out, sometimes indoors.

What we do

1. Walk the roofline, soffits, vents and siding.
2. Confirm no active nest is in the gaps we plan to close.
3. Seal with materials suited to each joint.
4. Give you a written list of what was sealed.

What you can do today

• ☐ From the ground, look for gaps where soffit meets wall.
• ☐ Check vent screens.
• ☐ Note any spot wasps used last summer.
• ☐ Book sealing before spring.

Background reading: exclusion vs bait stations.

Questions

When should I seal to stop wasps nesting?

Before the queens choose a site. In Calgary, overwintered queens usually start looking in spring as it warms, so fall through early spring is the window to seal soffits and vents.

Why do wasps come back to the same spot?

The same gaps in soffits, vents and siding stay open, and they suit the next queen as well as the last one. Closing them removes the site.

Should I remove an active nest myself?

No. Disturbing an active nest risks stings, especially from ladders or in confined spaces. Active nests are assessed at inspection.

Is prevention the same as nest removal?

No. Prevention is sealing the gaps before nesting starts. Nest removal deals with a colony that is already there. They are separate jobs and get separate quotes.

What does prevention cost?

Wasp prevention starts from $234 + GST; the final price depends on how many gaps sit at the roofline. We price it once we have seen the building. Inspection is complimentary when you proceed with the recommended service. Prevention and any nest work are quoted separately.

Show us the gap.

Text a photo, call, or request a written quote.