Had a sizable gap between window sash and frame. Enough for a breeze! Probably a good 4mm
Successfully changed the hinges on my own in an attempt to not have to buy new windows.
To my amazement it worked.
Note! A window is much heavier when you're trying to hold it in place with one hand, stopping it from smashing to the the ground and trying to put the screws in with a power drill!
It was the upper floor! So did it from indoors
YouTube made it look easy!
Dirty old hinges below
This is the temperature profile for Tuesday.
Will see if any improvement tomorrow.
I think there will be.
These two rooms are on similar schedule.
This is from last year for February.
So hopefully can measure some actual savings.