Do wasps in the attic always mean a nest?

[BeansMeansBeans]

I went into the attic to put the Xmas tree away today and there was a wasp in the insulation. Alive! Then when I had put the tree away, came down, a different wasp (as I killed the first) came down too. Eek! Do 2 wasps always mean a nest is nearby realistically? I had a quick recce but couldn't see anything.

Not always, but it's the way to bet.

At this time of year almost definitely.

Yep get a bomb to lob into the loft.

Yup! We’ve had to smoke out the loft a few times this winter, they seem extra persistent this year!

Yes, almost definitely.

We get them every year in the attic at work when the weather turns cold.

Sometimes we leave them but sometimes they cause a problem and we have to call someone to remove it.

Yes, definitely.

If you can locate the nest, then, if it's a small one, you may be able to just spray with with wasp killer.
If it's a large one then get someone in.

It doesn’t always we had lots of wasps on year and couldn’t find a nest (professionals were out). They move on from thier nest at end of year and move from place to place dieing off along the way. It could be they are setting up in your attic for next year though. I’d get it sprayed just to make sure.

Do you need to remove everything from the attic when you get it sprayed? Feel like this is about the last thing I need!

It's just the queen wasps hibernating. At the end of the season the worker wasps die and the queens leave the nest and find somewhere quiet for the winter. They'll leave when it warms up in the spring. They don't sting, you can just gently waft them out the window.

You don't need to do anything. Because they are tucked away a smoke bomb is unlikely to reach them. A (decent) pest controller should tell you this. Well, a decent pest controller is telling you! 😁😁 (that's me, by the way)

Having queens in your loft means you probably had a live nest this summer that you didn't notice. Having one this year doesn't mean you're more likely to get one next year and having an old nest in your loft (whether you can see it or not) won't encourage wasps into your loft.

The only thing you can do with wasps is deal with a live nest when you notice wasps buzzing around outside in one particular area. Always use a professional to deal with it. Don't block up the hole hoping to keep them out (we have at least 1 person every year who does this, you end up blocking them in and they'll chew their way out somewhere else, usually inwards!)

By the time you've spotted them buzzing around outside the nest has been there around 3 months and has hundreds, if not thousands, of wasps in it. You do not want to be dealing with that with a can of fly spray!

@mumto3boysHE wow, thanks for the advice! So is it best to leave unless we see more would you say?

When it comes to nature, this should always be the starting point.

If it's not particularly bothering you, hold off on the killing.

Could be a young queen or 2 hybernating. You could have had a nest or will have a next next year. I'd probably get rid of them. Those buggers can chew through things.

You'll probably see one or two more, in the spring. Just waft them outside. One might decide to stay in your loft and build a nest (size of an acorn to start with) but then again, they might not.

Don't worry about it. Deal with it in the summer if you have to, ie, if it's in the way. You had one this year and didn't notice it...

Leave them. If they're queens then they'll go elsewhere and make a nest in the Spring.
If you kill them there's 2 less wasps nests. Which means thousands of whitefly and lacewings don't get eaten and your garden suffers. We need wasps. They're amazing.