Mulberry View

I'm thinking of laying the upstand flap of the internal 1200ga membrane over onto the flat light blue XPS face, then laying the EPDM from the door threshold over the top of it and bonding the 2 together on the horizontal plane, or vice versa. This is a rough diagram of what I propose. The magenta is the EPDM, the green is the 1200ga DPM. I hope it's not too hard to see... I wouldn't be able to retain the turned up portions of the EPDM on the jambs if I want it to head downwards, but are they really doing anything? I could triangle cut them to allow the EPDM to fold down. Does a threshold DPM usually turn up the jambs anyway? Apologies that this sketch is not at all in proportion!

The RK door is set up for 9mm clearance. You can see the skimpiness of the threshold arrangement in that drawing. Essentially, my EPDM sits on the datum line where the arrow points and just has slim packers (around 5mm) between it and the underside of the threshold.

I've just received the first draft of a more thought-out UFH layout. The designer has gone for 300mm pipe centres. It looks (worryingly) simple! I've raised concern about heat striping, I don't really want to risk that. He has gone for 3 manifolds, one on each of the 3 ground floor levels. 2no 2-port manifolds and 1no 6-port. I've proposed and idea for 2 manifolds and have fed that back. He has suggested that 20mm MLCP for each manifold is sufficient, something I've probed on because it seems very small. I'll share the design once I have it, but I am minded to want closer pipe spacing as I'd prefer some headroom. Not least in case I can't hit my desired ACH. I'd rather have more pipe and have to control the flow temp than find it's just weak performing.

Inward.

So, I'm lapping the EPDM with the lower DPM that runs under the PIR as opposed to the slip membrane that'll go over the PIR?

This is an external door installed onto XPS with EPDM as the DPM. The EPDM was left long on the inside. I turned it up at the sides in case it was needed. It's an ICF build with Waterproof concrete and no conventional DPC. It's an RK door with a skimpy low threshold, almost non existent upstand. The floor is Block & Beam, there is a 1200ga DPM under the PIR, this is what you can see in the image laying back onto the PIR. This is with the EPDM lifted. The inner threshold is 50mm below the door threshold, but still XPS. The screed needs to come up almost to the underside of the threshold, with 3-4mm Microcement as the final finish. How should this detail be finalised? Should these membranes just be taped together? Any expansion joint along the threshold? There's another 80mm of PIR to go on yet, this will bring it level with the blue XPS, with everything 50mm below final FFL. I have 2 more Norrsken doors following roughly the same principle. As always, your help is invaluable to me, and I'm procrastinating on it at the moment!

Looks pretty reasonable. The description makes this sound DIY'able. Is it as easy as plugging it in and away we go?

What sort of cost is to be expected for a modest battery installed?

I think they were deemed from the start? No export meter, just a 50% payment for export

My Father-in-Law has a 4kw system on the bumper tariff. Lucky him. We both bought in at the same time, but I moved house to enjoy the delights of self-building! Anyway, he's interested in adding some battery storage. Do we have anyone here that can give me some clues as to what might be involved? He still has the original Sunny Boy inverter, running flawlessly and has since connected a Solar iBoost to it for the immersion heater. He's not looking for the pinnacle of technology, more a cost-effective way to utilise the energy he's generating. He has no export meter by the way. 😉 He isn't really in a position to go EV at this stage.

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.