Wasps will normally be entering through a gap between the soffit and the wall of the building.
How to destroy wasp nest in roof.
If possible use a polminor powder bellows and coat as much of the outside of the nest as possible with dust failing that use rentokil wasp nest killer foam aerosol and cover as much of the nest as you can in wasp killer foam before promptly vacating the roof.
Getting rid of wasps in roof vents requires diligence to make sure they don t return.
Use a torch to locate the nest but turn the torch away from the nest as soon as you see it otherwise wasps will come toward the light.
Add 1 cup of white vinegar into 1 cup of water.
Non poisonous method to get rid of a wasps nest in a roof you can use a garbage bag inside a landing net and a long handled scraper to remove the nest from the roof where it is attached.
If you don t.
Eaves nests can often be easily treated from within the roof.
Step 2 approach the nest.
How to get rid of a wasp nest.
Step 1 gear up.
To get rid of wasp s nest wear protective clothing approach the nest at night when the wasps are less active and thoroughly douse the nest in an approved pesticide spray insecticidal dust smoke or water.
When treating wasp nests in the eaves of a roof you can safely break into the nest with the duster lance and get wasp killer powder inside the nest but do not try that with a hanging nest unless you are fairly sure it won t fall to.
Fill the spray bottle with this mixture.
Perhaps the most effective way to get rid of a wasp nest is to use insecticide spray.
If possible do not turn on a loft light.
Make sure you use gloves long sleeved clothes and a protective mask.
Step 1 spray an insecticide into the vent to kill any wasps that are currently in the vent.
Place the bag over the nest knock the nest off with the scraper and seal the bag.
Before you begin to even approach the nest ensure you wear protective clothing including a gloves and a veil.
Step 3 use your spray or powder.
Leave any nest entrance open to allow foraging members of the colony to come back in and come in contact.
Often the wasp nest will be down in the eaves at the edge of open loft area.
Keep it in a safe place to use every time you see offending wasps.
Wear a breathing mask and follow all instructions on the package to prevent inhalation.
The spectracide wasp and hornet killer kills these stinging insects on contact.
An empty spray bottle.