Mulberry View

We're planning to have a borehole. Most of the ground around the place is permeable. We have a 60m driveway leading to the house, this is all 150mm Geocell, with Type 1x infill. This will eventually be topped with something like Cotswold Stone. The Cotswold Stone will carry on up to the building, to the Car Port and in the area between the Car Port and Main House. We have an ENORMOUS soakaway. 92 crates. This will deal with the rainwater. What more can we do?! Now, back onto the flat roof?! 🤣

The area between the Main House and Car Port will be permeable stone. There'll be the same stone leading up to the Car Port. The Car Port itself will be screeded to fall towards the entrance. The run up to the Car Port is uphill. I'm not planning to wash the car anywhere near the Car Port to be honest. The area under the Link Roof will also likely be a permeable solution, probably a Thermowood decked walkway leading from the front door to the Car Port. The Car Port and Link Roof are Posi joisted. There will be lighting and electric to the Car Port and Link, probably ceiling downlighters. Solar PV on the Car Port. I expect this will all be taken care of in the Posi structure.

Likely to be a single-ply membrane. I can see the fascias being Aluminium flashings of some sort. The underside needs to be a flat ceiling, though I'm not sure if it can be plastered as it is essentially outdoors...

Our scheme has a single Car Port with a 10° monopitch roof which is linked to the house by a walkway with a flat-roof over. This is the roof plan... The Car Port is to have a gutter along the low edge, which will drop water onto the Link Walkway roof, which is essentially a flat roof. The water will fall towards the bottom corner as denoted on the plan. From this drawing, I have assumed a kerb is installed at both edges, with the water dropping through a "Plug'ole" before being directed into the adjacent RWP. Does anyone have any words of advice as to how this fall arrangement is organised with firrings? Or can you suggest a better way? I did debate arranging the fall to simply run from right to left and into an integral gutter along the right-hand edge, so in essence the water from the roof above will drop directly into the integral gutter below and the water falling on the flat roof will fall also into the integral gutter. Any thoughts/advice would be appreciated, as always.

Although the design isn't done yet, in my case, the consultant has talked about 3 manifolds, none of which will be adjacent to the ASHP and each one is on a different GF height level, so routing is on my mind. it might be common sense, but it seems as though he's going to include this in his design.

@JohnMo How far are your manifolds from the ASHP? Do the pipes from the ASHP run in the floor insulation or...?

Each manifold needs to have an MLCP supply and return, these were something I didn't understand at all in terms of when they are installed in the sequence. These are separate from the heating loops and, as I understand, need to be insulated. Yes, the same person is doing both elements and will also be helping me to spec the whole heating and ventilation system by the looks of it. Probably PV too.

I've paid £195 for a heat loss analysis with a hefty report. £295 for the UFH layout and for that he's going to route the manifold supply and returns too. Honestly, I think he'll pay for himself in what he's looking like he'll save us on kit already.

Just to update this, I've put it with an independent heat-loss consultant who has done a much more thorough heat-loss analysis. Very comprehensive and far more believable. I'll be sharing his details on here once I have the full work in hand so I can make a proper recommendation. I realise many can do this themselves, but there are clearly some out there with far more knowledge than I can hope to attain in the short time I have to get this sorted. Good news is that he makes our total heat loss a more respectable 5.45kw and has already hinted at 300mm pipe spacings with a 5kw heat pump. I hope to have eyes on the UFH layout plan next week.

Thanks @Susie, very helpful. I'll check your blog out.

Not got it yet, but I really am hoping for 0.5. The windows and most doors are Norrsken P31A which are capable of it apparently. The roof is a monopitch warm roof that has minimal opportunity for leakage. We'd said that if we don't hit our desired ACH that we'd consider Aerobarrier. I'm not planning to let that make me lazy though!

No, my build was spec'd in 2021 using their standard blocks. They advised us at the time not to bother with anything other than standard.

Our Architect drew a 50mm "Service Void". Now, I know it's not strictly needed with the ability to chase stuff in to the Polystyrene, but what have you done? We have a Posi FF and roof, so plenty of service scope there. I haven't got my mind off running an internal skin of PIR (25/50mm) instead in an attempt to lift the "weak" 0.24 u-value of the Nudura blocks, but I wouldn't do both the PIR and the void.

I've only just clicked on this, looks like a comprehensive tool, thank you. What steps do I need to complete for the UFH calcs?

Awesome! Anyone up for productively helping out with this for some beer tokens?! 🤣🍺 This guy is primarily a screeder by the way (and one that came highly recommended by someone I really trust), so I'm not holding it against him too much. I also think he'll be a good supplier for the kit, perhaps just not so much the design!