I'm planning a small extension,
walls to be brick on the outside,
then a cavity, then blocks

The blocks hold the roof beams up,
the bricks are to look nice and stop rain.

I see videos of people putting insulation -
(wool or kingspan)
in the cavity.

But wouldnt there be a thermal bridge leaking heat both at the bottom and the top of the cavity insulation?

Wouldnt the same amount of insulation be more effective if on the inside of the block wall ?

george