I'm planning kitchen and bathroom renos. Kitchen will include removing a wall to open up to lounge, so I'll be adding some structural steel.
I've started with getting a handle on the level of the house (2 story, brick veneer). I averaged the max gradient standards to 1:195. Turns out my house is 9mm over standard across the diagonal (1:170). However it has dropped the most in the front right hand quarter: 11mm (1:150). All this appears to follow the gradient of my section.
Do I absolutely need to reblock any, all or only some of it?