Mr Punter

We had these on a building we converted into flats. They went front to back and I think helped strengthen some timber beams internally.

Can you cut a much bigger hatch and trim out the ceiling joists? A drop down hatch and a proper ladder will make regular inspection and maintenance easier. I think the MVHR units normally have a condense trap that needs to be fed into a drain. Was a PIV unit ruled out? They are a simple install.

SAP (part L) is to do with energy efficiency. Part Q / Secure by Design is security. Part O is overheating.

It is always worth phoning if you need a decent amount. Bear in mind delivery costs can be high on insulation.

They don't seem much cheaper than e.g. https://condell-ltd.com/rockwool-rwa45-600x1200x100mm-4-per-pack-2-88m-20-per-pallet

Ask the SE if there is anything you are unsure of. It is what you pay them for. A normal lintel is easier to deal with. I have used the Hi Therm ones before and they give you the psi values which is useful for your SAP calcs. Maybe some of your openings are too wide, so beams are the only way?

I have used Guttercrest. Very good quality. Lindab is also good but only plated steel.

The planning consultant could be a good call. I have, in the past, instructed architects to design a scheme that did not gain planning consent, so quite a waste of time and money. I would favour shortlisting a couple of architects and asking each to produce a sketch scheme for an agreed fee based on your brief and input from a planning consultant.

Can you please use stainless screws?

So really all normal 2 storey buildings? Typically outside ground level = 0.00, Ground floor FFL = 0.15, Ground floor ceiling = 2.55, First floor FFL = 2.85, First floor ceiling = 5.25. I think you may have misinterpreted the guidance.

No, system boiler and UVC. Viessmann modulate down to 3.2kW and cost less than £900+VAT. One stat and TRVs.

Yes, it looks like it has washed off. A bit silly rendering in the rain.

A bit off topic, but I know of no instance where a domestic dwelling in the UK ever suffered structural failure via steel losing strength in a fire.

So the first house you build is a spec development. Buyers will not be very interested in the heating system, EPC score or airtightness, just location, what it looks like, number of bedrooms and price. People are used to gas boiler and rads, so unless ASHP and UFH are cheaper, think twice. You will need a design stage SAP NOW! This will inform the minimum level insulation, heating system, hot water and airtightness needed for you to get Building Regs. Do it for as little money as possible.

Perhaps a flat entrance door would work. It could also be Secured By Design.

Agreed but they are wanting to pull his pants down. The elevations look simple enough. No magic needed and it is well within the skills of any decent bricklayer.

I would be concerned if the steel won't hold up a standard med dense block within the allowed limits. In addition to the mesh for the render, you could look at bed reinforcement for the blocks. Only use the 7.3N ones.

+1 Also look at any extensions going up. Merchants can often recommend, even if it is the guy in the yard or a lorry driver. Have a drive around and a chat. It shows you are not a time waster. Farmers often get brick and blockwork work done and they don't overpay.

Keep going with the quotes. What did your estimator base their price on?

I have followed the Graven Hill development over the years. I struggle to understand what it is about. Does not appear cheap or efficient to do, not very attractive, not cohesive, detached houses only and for all their individuality it looks quite soulless.

Agreed. They are trying to move in on @Pocster's turf.

With a dark colour frame it is not clear in the photo what the issue is. How big is the gap? The reason they arrived unglazed and uncoupled is probably weight. Unless you had good access and were prepared to pay for a glazing robot it will be in sections.

Is the image the right way up? Does the concrete have a DPM under? If so I would just lay your new DPM and lap up the wall. If not you may need double sided quality DPC taping.

Get them to do the drawings and spec. You don't want to be designing this yourself or winging it on site when you have paid a professional to do this.

I have not made a section 75 claim but will be interested to see how you get on. It does seem to favour the consumer. Please let us know how it progresses and what you had to do.