Oz07

Is it any surprise Pakistan has a lower co2 person output?! It's the bloody third world! They don't have electricity in caves. The solar is good news but we don't want to be in a hurry to match their co2 per person else we may go back to living in caves ourselves.

As I've said before on here I nearly come a cropper with this. Looked at a plot down narrow drive over 90m long. I don't even think you can mitigate with sprinkler over this length. I left it for the vendor to get me in writing off building control that they would approve. They never did and the plot is still for sale. Don't assume bco will sign it off because planners said ok. Bco is technical and concerned with safety, planners aren't. It's a lot of money to spend to fall at final hurdle.

A planning inspector is not the same guy who will be the BCO and signing off the finished house. Just make sure they are okay before you start.

Atleast you've always got a back up if the immersion fail.

Sounds like your job has become a bit of a battle for the bco. It's a tough one. Maybe in the first instance copy your piling engineer in on their concerns and get him and them to sort it between them. You want to try to de escalate if you want to get the job moving might need some skillful diplomacy when talking to both sides.

Sounds good what made you do this is it quicker recharge than ashp?

I'd just fill them with intumescent mastic.

Yes. Or even if 25/50/75 mm etc below you can use a sacrificial layer of eps to bring you up to level. I say sacrificial but obvs would be part of your floor insulation.

Yeh I've seen site bashers literally use a garden fork and spade to mix it up in a big tub. I think as dry as you can have it while still workable for board adhesive.

I'm also terrible at wet trades. I think a lot of the skill is getting consistentcy of the mix right whether it be mortar, adhesive etc etc

I find a bucket trowel easier to throw dobs on.

You can if everything is in course. I've done it myself before ontop of b&b with a spine wall. You just lay ontop of the membrane

This is what I am asking why cant it be done like this? Think @ETC is saying similar?

Mix a blob of adhesive up, dab a bit of board on and try to get it off in a week. No prep required usually. If excessively dusty give it a brush. I certainly wouldn't be wetting it immediately prior. Might be hard to dab the boards to a straight edge

How deep can these radon membranes go. Is there any reason they can't go flat below the insulation layer and just end up with membrane spanning the whole envelope of building. No corners etc. Any spine walls laid on top.