Should I remove a wasp nest myself?
Removing a small, low, open paper wasp nest on a cool evening is a job some homeowners do with a labeled wasp spray, but it is risky. Anyone allergic to stings, anyone on a ladder and anyone dealing with a nest in a wall, a tree or the ground should leave it to a technician.
The usual mistakes are spraying at midday when the nest is full, standing too close, using a ladder with one hand free and knocking a nest down without killing the colony. Wasps that survive are angry and will go after the nearest moving target. The cost of a mistake is far higher than the cost of a call.
If anyone in the household has ever had a serious reaction to a sting, do not approach the nest at all.
Why do wasps nest in the same spot on my house every year?
Wasps pick sheltered, dry, undisturbed spots, and a good location stays attractive. Old nests do not get reused, but a new queen looks for the same eave, soffit corner or porch ceiling because the site is protected from rain and wind. Sealing gaps and knocking down nests early in spring can break the pattern.
Queens emerge in spring and start a small nest alone. Catching it early, while the nest is still the size of a walnut, is easier and cheaper to treat than a mature colony. Walk the perimeter every couple of weeks from spring, looking at eaves, gable vents, the garage ceiling and the underside of the deck.
A fresh coat of exterior paint, or screening over vents, will not stop a determined queen, but they can make a spot less appealing.
Can hail damage and roof repairs make wasp problems worse?
They can. Spring storms in Plano have produced large hail, and damaged soffits, loose fascia or unsealed repair gaps leave small openings that wasps may use as a way into a wall or attic. If repairs were done recently, ask the roofer to confirm vents and edges are closed.
A technician cannot repair roofing, but can tell you where the wasps are entering. Hailstorm reports have been recorded in Plano, including at Park Boulevard and Preston Road, which is a reminder to check eaves and soffits after a big spring storm. A quick look from the ground a week after repairs, with binoculars, is often enough to see if wasps are using a new gap.
What do wasps do in fall, and is that the worst time?
Late summer and early fall are often when colonies are largest and most defensive, because workers are searching for sugar and the nest has reached full size. Treat nests as soon as they are spotted rather than waiting for cold weather, since wasps in a wall void can stay active well after a first cool night.
Old nests are abandoned after the colony dies back, and they do not need treatment. They can be removed once the technician or you are confident they are empty. Outdoor trash cans, open soda cans and fallen fruit draw yellowjackets, so keep lids tight and clear fruit from under trees.
What should I do while waiting for a technician?
Stay away from the nest, keep children and pets indoors, close nearby windows and doors and avoid mowing, trimming or running a pressure washer near it. Do not seal the entrance or spray it yourself. Wasps that cannot leave a wall void may chew into the house.
If a wasp or two gets inside, turn off the light and open a window or door, since they move toward brightness. Avoid swatting a wasp against skin, which can trigger a sting.
Make a note of where you see traffic, roughly how many wasps leave in a minute and what time of day it is busiest. That information helps the technician confirm the entrance quickly, particularly for soffit and gable nests that are hard to see from the ground.