Garage Conversion - Going for it but some questions.

[If in doubt...]

As per other thread the kitchen / garage wall is non-load bearing so my son is going ahead converting garage to a dining room and I would like to do as much as possible to help budget-wise. Have done 2 of my own in the past but not done the front wall before and was a few years ago.

Pics again below - is semi-detached so only a small section is external wall. Will be Building Notice and I usually get good cooperation from BC but want to do my homework first, and if I have to get a builder in to do certain parts then so be it but below will help me decide.

1) The garage slab is in good nick so the thought is DPM and PIR + floating floorboard but the floor height difference with the kitchen means there will only be 50mm for PIR taking in to account floor boards etc. Any issues there?

2) I'm assuming the front wall will need proper footings dug out, if so will we need 150mm cavity or as rest of house is 100mm can we stick with that?. Son also wants rendered wall rather than brick and full width window - which hopefully reduces toothing bricks and me thinking Im ok to do it with blockwork and a mate render, otherwise builder will have to do brick work.

Thanks in anticipation.

Cheers

 

[stevie888]

BC usually sensible about floor insulation in these cases and it's written into the code that there must be a demonstable payback in IIRC 7 years.

A common solution to the front wall is a PCC lintel set just below ground.

You'd be much better off to put in drawings and resolve stuff before it's an expensive mistake. With many authorities the fees are lower and BCs definitely prefer to avoid Notices. Drawings don't have to be anything special: just show your intentions.