Wasp nest in wall. Any potential damage?

mrcheez

Wasps appear to be busy going to and fro a gap under my external window sill, clearly in the process of building a nest in the wall.

Should I leave it, or will it eventually cause damage?

Any tips on removing the nest? I can only see the 3mm gap under the sill where they seem to be going in.

gozunda

mrcheez wrote: »

Wasps appear to be busy going to and fro a gap under my external window sill, clearly in the process of building a nest in the wall.

Should I leave it, or will it eventually cause damage?

Any tips on removing the nest? I can only see the 3mm gap under the sill where they seem to be going in.

I presume this is a cavity wall? The main danger is the proximity of a large nest of wasps that can sting when disturbed and who will be attracted into the house. That said a large wasps best can smell quite strongly in hot weather. If is a small hole I would recommend waiting until most of the wasps are out during the day and completely block the hole. Ok you will trap some inside but you will stop a bigger problem later on.

mrcheez

Would I need to call the exterminator to be sure?

gozunda

mrcheez wrote: »

Would I need to call the exterminator to be sure?

To be sure of?

mrcheez

To be sure to get rid of them entirely rather than having an old nest with little hatchlings (I can hear them through the wall which is rather distracting). Perhaps they have a way of smoking them out.

I'll consult my local hardware shop to see what they suggest to block the hole or kill them.

my3cents

Fresh crawling insect powder that contains permethrin will get rid of them, just put a couple of good puffs in and around the hole just after dark. Needs to be fresh as in made this year as it goes off in storage.

Stella Virgo

get rid of them.there will be literally thousands of the bastards when it is fully built. they WILL attack if provoked by a child /adult/ pet dog etc etc. there is plenty of countryside out there for them , you do NOT want them in your house wall. if they get into the attic/house you will have a serious problem

aaakev

How did you get on op? Just came back from holidays and noticed wasps going in pot a gap in my wall where the kitchen extension meets the house. There is some pointing missing and they are getting in there.

I got wasp nest destroyer foam and sprayed the whole can in last night which killed a load of them but somehow they got into the bathroom where I had to kill them too. Still there today going in from the outside so I got another 2 cans of the nest spray and have put one in a few minutes ago and mad going to hit them again tonight....

Anymore advice?

mrcheez

I got a bottle of Rentokill Wasp Nest Killer powder and put two large puffs under the windowsill. Instant death as I didn't even see any wasps leaving!

http://www.woodiesdiy.com/Product/Rentokil-Wasp-Nest-Killer-Powder-300g/6533/4.4.8#.U_dksqN_TXs

Powder might be better than foam as the dust is dragged into the nest by the wasps and kills problem at source.

Colovelictis

If you are not afraid of taking care of them yourself, you should be fine with the recommended suggestions here. I have seen my own mate take hold of the entire hive without any protection, he really says they do not care as long as they are proper sedated beforehand.

aaakev

The first can seemed to do the trick, loads of activity when I sprayed, loads more came but the foam killed them. Hit the nest again last night and haven't seen one since. Fingers crossed......

RustyNut

aaakev wrote: »

The first can seemed to do the trick, loads of activity when I sprayed, loads more came but the foam killed them. Hit the nest again last night and haven't seen one since. Fingers crossed......

Its important to wait till after dark when they are all back in the nest if you are going down the spray route.