ETC

From your FGL when the house is built. Sometimes combined with a maximum under build.

Waste of money insulating the garage if it’s not heated. Insulate the wall between the garage and utility and the floor between the garage and any habitable (and heated) accommodation above. No heat = no insulation required.

Why?

No need to insulate the wall. DPC shown in optimum location for damp penetration.

?

Once stayed in a hotel/b&b in Canterbury - not a level floor in the whole building - was grand.

Why don’t you just lift the boards and put firing pieces on? Simpler and cheaper.

Is the roof built? - if not change to a warm flat roof. If built can you drill holes through the cross members?

I’ll do it tomorrow when I’m at work.

If the radon maps says there’s radon in the area put a radon barrier down. What benefit is spending a shed load of money on an “assessment” which will more than likely be a desktop exercise using the same maps!

Rubbish. It’s the cost of a 1200 gauge DPM with all joints sealed and a few top hats. Put it under the slab and you don’t need any radon proof DPCs at all.

Very simple - set your road as 100.00 and measure everything from that datum - up for dropped kerb, higher for the grass. Keep it simple.

Madness. If there’s radon in the place where you are building put down a radon barrier. Why do you need a report to say that one is needed. Either a 1200 gauge membrane UNDER the slab or a radon proof DPC (Visqueen CPT) sealed to the DPM to the perimeter of the dwelling ABOVE the slab. If you need a sump - put one in - what is so complicated about this - I see it every day. If you want a detail let me know and I’ll post one.

Road=100.00. Dropped kerb=100.025. Grass=100.150.

https://historicengland.org.uk/images-books/publications/eehb-insulating-solid-walls/heag081-solid-walls/