Originally Posted by demicav
I have two questions, Is it normal to have so many Queens in a small area ?
Yes! My house, and the office I work in, also have lots of queen wasps cruising round and coming in through the windows at the moment.
and Why do they seem intent on gaining access to the house ?
They're looking for nest sites, and they nest in cavities, so the eaves and lofts of houses are fine for them. While searching for such places they often make their way in through the windows, and are usually in no hurry to get out again.
You should find that the numbers will dwindle again soon, but watch out for any evidence of a nest (they're unlikely to build a nest in the living space of the house, but could do in the loft or a porch etc.).
The ones you see chewing on wood are collecting material to build their nest (the nest can be some distance away from where they collect the wood).
With children around, and especially if you are allergic to the stings, I would have thought that you'd want to destroy any nests that are actually in your house, and would recommend that you get a professional pest-controller in if a nest does appear (your local council should be able to put you in touch with one).