core drilling

I need to get a power cabling route from a distribution board in a new extension to a shed and garage outside. I don't want cabling or ducting visible outside. The issue I have is the builder has put drainage services on both sides of the wall. (see sketch below) - the screed and insulation...

Hello there, My project is to properly vent my cooker hood to the outside (currently using charcoal). I want to avoid drilling at the kitchen ceiling height as this would take chunk out of the nice white window lintel and/or the metal rain run off. So I've opted to use the floor cavity (white)...

I want to core drill through the cavity wall, underground, for a soil pipe. Due to the depth and location of the existing outside drains it will be very close to the footing, practically resting on it. It will need to be about a 150 mm opening. Is this a concern for structural stability? DIY-able?

So, Using my Makita HR2230 with a brand new Erbauer 117mm core bit to go through a double skin brick wall, no cavity (house built in 1901). The wall is about 280mm thick and I’m about 230mm in, but I’m now getting nowhere. I keep stopping the drill and drawing a pencil line at the back of the...