Bill Gardener wrote:
Not forgetting that when you drill a large hole in brickwork I would
assume it weakens the structure.

I would be interested in hearing what the experts think of this as I
have just installed a Bosch cooker hood which required a 150mm hole
through the outside wall.

Does a 150mm hole really affect the walls structural integrity???


Thanks,

Bill

As most kitchen extractor fans require a 150mm hole (as opposed to toilet
fans which are 100mm) I would hope not.
About the same as removing a standard brick?