RedRhino

Haha - good spot! What I meant to say is that all the heated rooms tend to have a common temperature and all the unheated rooms have a common (lower) temperature. I'll investigate the cooling for our model (Valiant Arotherm 5KW) ASHP - thanks

Thanks for the comment. I believe the current gov’t ASHP grant is only applicable to heating machines rather than heating / cooling machines. So no, ours doesn’t cool. Our bedroom only has easterly windows to avoid overheating in summer. As mentioned, we have no heating upstairs so the bedrooms are cooler: about 18c.

We are entering our first winter in our self-built timber frame house. ChatGPT created a graphic and I thought people might like to see it. With MVHR the good and bad news is that room temperatures tend to equalise; and the rate of cooling is slow so nighttime temps are very similar to daytime temps. On that basis we have just one thermostat on the ground floor which is set to 21c. 220m^2 across three floors. No heating upstairs. Tesla Powerwall 3 to store solar. We only exported about 10kwh in November.

Hi Nicolas, apologies for the delay. Our solar company dealt with the DNO permission. We never heard of any issues.

Dear forum members, Our house is complete and we have been resident for three months. I thought to post some pictures and I offer to answer any questions people might have. I don't put ourselves on a pedestal as being any better than other projects, only to say that we have done it. Our primary decisions: We chose a RIBA architect given the importance of the initial concept The layout is somewhat novel, having an H footprint with a single storey 'extension' to reduce the mass of the main house for planning purposes and to help project the rear of the house beyond the shade of the ridge line We chose timber frame (we have built with timber frame, brick and block and ICF in the past) because of speed of construction, and thermal performance We selected MBC from a shortlist of three TF suppliers, and chose MBC's insulated slab We are very pleased to have chosen a large solar array (9KW) and Tesla battery. We have used no grid electricity since commissioning. We have a Valliant ASHP with UFH but haven't had need to heat the house yet We have MVHR which works very well with our air tightness of 0.89 We have no fireplace or chimney We project managed ourselves, and were onsite every day and I did a lot of carpentry / general work alongside the proper trades Project timing: groundwork prep Dec 24, slab Jan 25, frame erection February, windows March, resident 4th July, finished end of August.

My apologies if this subject has been covered elsewhere - you are welcome to direct me to previous posts. We have an MBC timber frame house sitting on the Kore insulated slab. The section drawing of how the house sits on the foundation is not entirely representative. Our slab is slightly oversize and so there is a step out of between 0 and 60mm on different walls. The foils from the timber frame and the red radon barrier needs to be tidied and we have to anticipate that moisture could get behind our final finish (brick slips on 50mm battens) and so needs carrying away. The anecdotal recommendation is to unpin the silver breathable membrane from the foot of the timber frame, insert a DPC and let that go over the lip and down on to the EPS. The red radon barrier is super stiff so won't sit nicely particularly where there are folds. I plan to cut that back. We don't have radon in our area. We learn that the foils can be cut back to end 25mm down the face of the EPS. We can then secure with render board or similar. My questions: is that what other people have done? how would you secure the render board? mechanical fasteners or glue or ?? Thank you in advance

As people correctly say: "Where are the pictures?"

Folks, We are on our self-build journey, we selected timber frame then short listed 4 suppliers and in the end chose MBC. They erect our medium complexity house in 8 working days - very impressive. I think MBC's strength is their experience which shows in the detail / thought in the design office and the efficiency of their erection teams. Our site is constrained so working out the order to deliver materials, how things are stacked, the order that things are lifted by the crane is complex. The team didn't seem to make any mistakes and just kept working, rain or shine. [To confirm I'm just a paying customer and have no other association with MBC]

Have other people run the numbers on PV vs roof tiles? For new build you can put the solar panels directly onto the roof so removing the cost of the roof tiles that would otherwise be there. We have a quote for pitched roof tiles with membrane / battens / counter battens of £150 / m^2. A Jinko solar panel 1.086m x 1.726m = 1.87m^2 so its fitted cost with undertray etc is surely going to be a chunk cheaper. I don't think we will have additional costs from the inverter. And of course extra PV is useful if only to extend your season into the darker months. Anyone else come to the same conclusion? Anything I'm missing?

Thanks @MikeSharp01, it looks like this product: https://www.21degrees.com/compacfoam/ May I ask, did you use this just under the cills or all around the perimeter?

Drawing annotated : )

Dear Community, We are struggling with the last piece of our Rationel window & door order and would appreciate help. We are going from pillar to post with MBC, Rationel and our architect unable to specify a small but critical detail. For balance I would say we are very happy with great service from all three agencies on all aspects but we are stuck on this one. The MBC timber frame is going to be battened and counter battened to affix brick slips creating an offset that will extend down to 150mm above ground. We plan to sheath the EPS insulation from 150mm down to below ground using aluminium sheet. Thank you to the Self Build forum for helping us learn of that solution. But what about beneath the door cills? They are cantilevered out from the door frame and need structural support. We have received the detailed drawing attached but no one as yet can say quite what should be below the cill or how it is fixed. Thank you in advance.

I digress, but on a previous project we needed a BT landline connecting from a pole to the new house. The BT bloke said he couldn't do the job because the scaffold was in the way of his ladder. I said the scaffold was much safer than a ladder, but no, he wouldn't use it.

We are required to supply scaffolding for our self build, both for the timber frame erector and for the subsequent trades. We know to use a reputable scaffold company and ensure that the Scafftag is in place to show that the scaffold is correctly assembled. But what about subsequent scaffold inspections? We have contractors keen to offer this service but the cost of weekly inspections could be as much as the scaffolding itself. We have received various comments but it seems weekly inspections are overkill (if that isn't a bad turn of phrase). Yes, if the scaffold received damage from a vehicle, or someone unqualified tried to modify it then the scaffold needs to checked. But even as a 'Domestic Client' we could do a weekly record of the condition of the scaffold recorded to video and I think that would be sufficient. What say others?

Thank you that link was v useful. My slips are 65mm so the article is directly relevant