Hi
We seem to have a lot of flies acumulating in our attic?
Its dormer house, only moved in at end of last summer, only starting to notic this now as the weather is getting milder.
Air vents from waste pipes do travel through attic and out through roof tiles, however I cannot get a foul smell in the attic that might be attracting them.
Some of them seem to be coming down through extractor into the en-suite, only 1 or 2 at the moment but expect this to get worse as the weather gets warmer.
Any advice?