ETC

Not a great layout to be honest. DM me if you want me to look at the layout.

Cheaper by far to have put a radon barrier down……🤷

I spoke to a contractor yesterday who told me that he got a set of construction drawings for a detached single storey dwelling from his “architect’ for £2,700 - and he thought that was expensive!

Pumped insulation.

No need for cavity blockwork below sub-floor level.

Why are you building sub-floor blockwork in cavity construction? Would be better solid - plus easier and quicker to build.

Raise the FFL.

Floor plans, elevations and sections. Relevant construction details. Relevant materials specifications. Location map.

The detail of the step footing. I understand that regs require you to have 2 * the height overlap in the horizontal plane. Correct. What I am trying to work out is how you do the step. Either form it in timber or blockwork. Would you just step up 450mm in one place and if so, how does the bricklayer tie the block courses into the vertical face of the stepped concrete? The bricklayer won’t - the sub-floor blockwork work should be built solid and tied above the step.

What have you done so far?

What’s the issue(s)?

How are you venting the roof?

Murdocks.

Ask him to see the Regulation. Not just the Approved Document. 30 minutes in a house is more than enough.