A barn we rent has two wasp nests in it. Both reachable but one is in a weatherboarded cavity, the other appears to be behind a door frame.
I usually use B&Q's own brand but bought two aerosols last week and despite good treatment, it seems pretty ineffective. The foam seems thin and just runs all over the place and the wasps are not deterred for long.
Has this stuff been dumbed down. What's anyone using over the counter?
Simon