RedRhino

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

I guess it makes sense to nudge the dimensions on a timber frame house so that there is an exact integer number of brick slips around windows / doors / corners etc. Can someone explain a bit more please. Is there an existing thread? Matching dimensions to whole bricks - is that a dark art or standard practise? Is it only realistic for heights or widths as well? Are brick slips that standard in manufacture? Are all bricks the same size? I can imagine a worst case scenario where we take a whole lot more time and effort but through tolerance stack up, instead of some fitting and some not, all the bricks are just out and need trimming. thanks

Timber frame costs are front of my mind as we are about to select our supplier. Here is my thought: Once the house is built no one can tell the specification of the build - what the U value of the walls is or how much insulation is in the floor. When you eventually sell the house the people buying it will probably know little and care less about U values, air tightness, cold bridging etc. Compared to other factors like location, view, parking; construction standards are down the list. If you broadly agree with the points above then my conclusion is that if you choose higher construction standards / cost then you are doing it for yourself and no one else. Saving money on construction costs buys an awful lot of energy when you can get 5% return on any cash saved / not spent. So for me I'm torn between 'buying the best' (e.g. MBC) and saving money and pocketing the difference.

Thank you. I don’t think I can edit or delete the original post. If admin can do that for me please. Next subject is selecting timber frame. I’ll be more circumspect!

Guys, it’s just my opinion as I see it. I can anonymise the architect names if it’s a problem. Only trying to be helpful. Admin, please let me know if I am breaking protocol. thanks andrew

There is only one time to get the design correct for your house and that is at the beginning. So many consequences are baked in from the early design work that (in my opinion) you would be crazy not to get professional help. Another maxim we have when investigating potential plots is talking to local people. We button hole anyone we find to solicit their opinion on the local area. And so it was on a visit to Lymington. As the Estate Agent walked me between two potential properties we walked past a sign for a local firm PM me if you want the details. "These guys do a lot of the architecture work around here". We knew we wanted a local architect because they understand local precedent. Once the Estate Agent had left I returned to the sign, called the mobile number and got speaking to Rob. Very kindly he offered to come out to the two plots there and then. An architect's knowledge of which plot has potential, and which should be avoided is so valuable. In 30 seconds Rob had orientated my thinking and I couldn't doubt his judgement. He's an expert! On a subsequent visit, Rob met with us and in about 1 hour he went through the potential of our plot from top to bottom, front to back. He was so quick with CAD, offering solutions, trying alternatives, considering previous precedents - all for free, incredible. But before we chose Kode Architecture we should really consider at least one other. Using google I selected our architect PM me if you want the details but his name is Ralph, only because Ralph seemed to have done a lot of small / single dwelling self-build developments. Ralph is a RIBA certified architecture. I asked Ralph to do a feasibility study (free) for our plot. Ralph's outline solution was so strong and innovative that it won him the deal. The cost of a RIBA architect is not small but we figured if ever there was a time to invest money it is now. I rang up Rob, made my apologies that he had come second. He was magnanimous and very gracious. Ralph's work on our application has been first rate and we are happy with our choice. And that is how we chose our architect.