PeterW

If there is a flow and return pump then they need to point opposite directions - they currently point the same direction ie upwards which potentially means they are going against each other. May also be worth checking if those valves are fully open on each pump.

@Nickfromwales does that work on slate too..??

errr... dawning thought !!! The Kingspan/Carrier unit needs a pretty high water flow - those grundfos pumps either work in constant flow or constant pressure mode. If they aren't set correctly then the flow through the heat pump won't be enough. The other thing I can't fathom... why two pumps..??? Can you see what terminals they are wired in to..?

@JSHarris posted a spreadsheet a while back that he produced to do this from memory.

I deal direct with the MKM branch director - he’s been involved from the start and their pricing is always good, even for stuff that they have to order in. Getting a good relationship is key especially for deliveries. We needed 4 sheets of insulation adding to an order this week and I rang on the morning of delivery and it was done with no hassle. Even had one of their drivers put a steel in place with a hiab “as he was there....”

If this is internal to the concrete deck then I would protect the waterproof layer with fibre board or EPS and then cast the next layer over the top using a waterproof concrete. It may be belt and braces but it won’t leak ...! This sounds more like a job for a basement waterproofing product and not a roofing product.

You can buy DIN rail SSRs that would work in this instance that allow you to keep your 5V above the rail and the 220V below. I’ve got a link somewhere to some DIN rail dimmers that work off a 5v signal from memory too.

Magnaclean and a Spirovent ..!! Thats impressive..! One or the other, don’t need both but they won’t restrict unless they are full of crud. Open all the TRvs to 5 and let it rip ...

I plan to use a diverter that will just swap from buffer to DHW coil in a reverse W Plan so I should never have a closed circuit however fitting one may be done for belt and braces ..!

Makes me wonder if there is no auto bypass and there are TRVs everywhere ...

From knowledge of the market you may struggle to get that sort of input in the way you want, and would be better to engage a PM who is onsite to advise when the work is happening rather than after the fact and getting remediation action - the latter costs twice as much as the former as you pay to undo the work and pay to redo it. @recoveringacademic Has a few scars from this, and @Nickfromwales can also attest to how crap some subs can be. I found roofer’s to be a nightmare - 3 Velux in a row that were obviously not aligned and they had to redo but knew they were wrong - and that was down to lack of supervision. For clarity - I am the PM..! What is key is a level of technical supervision and assistance / guidance that is above your comfort level to use as a sounding board and assurance role. For me that is my private building control inspector who is providing warranty and building regulations inspections but also available on the end of the phone or an email to provide clarity on what to do in certain situations where I’m not 100% sure. If you say to one of these companies - and there are many - that you want enhanced BRegs inspections then you will get just that. The hourly rate is about £60-70 from a bit of research but that excludes travel time for short site inspections. You have a sliding scale here on charges from probably 1-2% of build cost for the adhoc guidance to 10-12% for the fully managed by architect or PM. The choice is a pure risk vs cost based on your comfort level.

@Barney12 please be careful with that ... of the three admins, one has MBC, one has Durisol, and one has traditional brick and block. Of the founding members, of the 14 there are 3 MBC builds out of 6 Timber Frame, the remainder are a real mix of method and provider. Its not exactly an MBC Church..!! My initial questions were pretty simple as I was trying to get a view on what had been contracted for - I’ve seen far too many instances on here and ebuild where we all jump to a conclusion and find it’s not based on the correct basis. I was very interested for example to find in probably @ryder72 third or fourth clarification that it was a brand new roof system that they had no experience of so I support his view entirely that it needed a lot more supervision from the contractor at that point than it had ..! I was taught one thing early on - learning from your mistakes is good, but learning from others mistakes is better...! This is what this thread is about ..!! Reviews of the good, the bad and what could be better of any of the TF providers.

There is a perception here that everyone uses MBC and right back at the beginning it was stated we were trying to supplement this with experience from others. It’s pretty well documented that they are not the cheapest, but with around 30 or so builds ongoing here it is interesting to see a wider view of who is using what. If you look geographically then the Scottish / Irish builds seem to be predominately TF, with a mix of other methods in England and Wales. Taking all of this information and trying to summarise this into objective useful and usable data for new builders is something that would be significantly beneficial but it needs the input available first.

A lot of councils require you to list the ASHP on the planning or apply for planning if installing one.

http://www.ducting-express.co.uk/store/index.php?route=product/category&path=61_202 What about these ..??

If you’ve got tiles left over then that surely will be cheapest as all you need is a roll of membrane and some battens. Ridge and edges can be done with cement board and mortar. GRP is the best for flat roofing by far but isn’t cheap. EDPM is ok but needs a lot more fiddly detailing. The key with both is to keep it dry as everyone has said ..!

The building control plans have to show the sections so ask the architect for these. Are you able to post the current plans ..?

Can someone explain to thicko here as to why you couldn’t use this stuff ..?? http://www.finest-filters.co.uk/diy-activated-carbon-foam-18-x-12?gclid=EAIaIQobChMI_puvjeKo2QIVTrHtCh08_g4wEAQYASABEgKsSPD_BwE If you put this into a 12” square filter casing with the gap in the middle filled with granules, would it work ..?? Or have I been at the product @JSHarris eluded to..?!

Ironmongery Direct today

Any chance of just boxing in the apex of the vaulted ceiling ..? A 75mm duct wouldn’t need that much and would put the supply in the right place.

Just be very cautious when stripping any of this sort of timber and wear a decent mask. Mouldy spores can be nasty when they get in the lungs.

40 headers and 40 stretchers to a metre would make it 250 sqm. So not unreasonable for a 12x12 with 5m wall height measured through. And yes, 5000 cuts not 10000..! Long day ..

Thats not a bad price tbh. If you work on 120/hr to cut then that’s about 84 hours cutting. By the time you have factored in a decent diamond wet table and disk for 2 weeks plus wastage and the stacking / sorting of 10 pallets of bricks and the fact you have only what you need to buy, then £1000 in the big scheme of things is rounding ...

20m with a 4 in 1 bucket is two passes each way, do it into a waiting wagon... I pay (North Midlands) £30/hr for the JCB, and even if I couldn’t get a half day it’s still only £240... muck away is £150 mixed for 14t with a grab or £180 for 20t clean or just soil. £235 was the last 20t of limestone I bought from the quarry - 30 mile round trip for the wagon. We are talking a basic access road here and going much more than 200mm down is pretty irrelevant unless it’s a proper bog with 4-500mm of clay or peat on top. And labourers ..?? £60 basic, £80 decent ..!

Depends what he uses .... 20m x 3m wide scrape off of 200mm of top soil is around 15 cubic metres or a Lorry load of muckaway top that with a 150mm layer of MoT1 compacted is around 10 cube or 18 tonnes of MoT1 muck away £180 JCB half day £120 roller half day £65 MoT1 £235 Value..? £600... however I would say it’s worth a lot more in terms of a clean entrance and access to site.