Post and beam

No not inadequate. This was approved by East herts planning, perhaps they are less fussy. The thing is, apart from the built part of the project everything green and growing is alreay existing on this site.

I understand the 15mm for 600 centres bit but i do not understand the MF part i copied in. please elaborate

Is this 2 x steels with some PIR between? and is the timber either side part of the construction or part of some fireproofing subsequent.

Standard plasterboard provides the 30 minutes protection though doesn't it? The timber posts and beams are a structural element and the steels sit on them. Nobody has mentioned a thing about providing additional 30 minutes protection of those. Curious.

Nick they are load bearing. I am glad you say nothing needs doing to them. is that because they will have plasterboard below them and are not on show?

This is how it looks in reality at the moment. No room underneath for anything other than the ceiling PB, what ever that turns out to be. And hard up against a posi on one side. The other one is the same.

It was BCO woman that asked me to do this. There is nothing on the build drawings from the TF supplier that mentions this at all. They are above the ground floor living room ceiling and will not be visible. Fire proof 15mm plasterboard on the living room ceiling it is then?

No not 3. Standard 2 storey cottage style. Please elaborate on what you mean by 'single layer of fire check' . Can i do what i described or do i need to encase them?

I have 2 steel joists running across the living room. They will not be visible once the plasterboard ceiling is installed. 10 inch posi joists carry the rest of the ceiling/s. Building control have asked for fire protection of these steels. Is it acceptable to just use 15mm fire rated plasterboard across the entire living room ceiling. Or do they need to be encased?

Looks like i am running some 28mm then.

The 32mm runs under the house and up though the block and beam to the manifold under the stairs. This is a 'fixture' now. Do you mean replace the 22mm from manifold to UVC with 28mm Nick. Keith

My proposed ASHP install is 12 metre run of 32mm from outside to under the stairs where the UFH manifold is. Then 16 metres of 22mm upstairs to the UVC. 7kw Vaillant Arotherm by the way. Installers are saying the mismatch is an issue and the Vaillant needs 28mm anyway. Do i have an issue ?

Understand, so across the 'pinch' points as well as around the perimeter.

So where does this go please? I have ordered some 8mm edge expansion foam because i was told that is the requirement. Cannot really understand why as there is either 25mm or 60mm kingspan around the perimeter everywhere.

Is it required at each door opening, and or anywhere else? I am thinking of a thin piece of say 6mm ply to screw a vertical bit of MDF to. This sits on top of the insulation/DPM separator layer