Temp

+1 If the pipe has to go horizontal then a bit more needed for timber to support plasterboard on back side of the wall. Say another 20mm?

Because most are made same way from basically the same materials. Sometimes with modifiers to alter the density or fire properties. Polyisocyanurate (PIR) is a modified Polyurethane. Typically around 0.022-0.028 Expanded Polystyrene is usually around 0.034 These figures are for a nominal 1m thickness of the material. If you simply scale the numbers for 150mm thick sheets they will be close to the makers spec for that thickness but can vary slightly due to surface effects. Normally the 0.022 figure quoted for PIR assumes most of the gas used to make it has leaked out (eg its aged). So for the first 10 years or so it actually performs a bit better. The main issue with rigid insulation is sealing gaps. Builders tend to just saw sheets to fit between rafters and I'm convinced that's where a lot of performance is lost. If I ever build again it will be a warm roof with insulation above the rafters so sherts can be butted together or perhaps using SIPS. Lots of other data here on different types of insolation... https://www.greenspec.co.uk/building-design/insulation-materials-thermal-properties/

It been that way for at least 15 years I think. It's to make them more accessible for disabled people. Nothing to do with access by babies. We built our house to these rules 13 years ago and it's simply not a problem. In fact it's great. You don't have to bend over so far to plug things in.

It's tricky. The CIL exemption must be claimed using the right sequence of forms before development work starts on site. Given the sums involved its unwise to do any work before you have got the exemption in place.

In my area was told everything had to be black for electric and they wouldn't accept twin wall conduit.

Some reading... Noise survey on 9 ASHP systems.. https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/48204/3307-acoustic-noise-air-source-heat-pumps-1.pdf Page 24 suggests some ASHP were 5db louder than the makers spec. Out of 9 sites only one was quieter than the makers spec. On page 27 they calculate how far away you have to be (eg from neighbours) before the noise level fell below the limit for Permitted Development Rights (eg <42db). It ranged from 4 to 28 meters. More if they make "tonal" noise. In one case 45m.

Does IKEA have them in stock somewhere you could go collect from or just not in stock?

Sold separately because in theory you could roll your own flashing system but don't go there. As I said above, I'd expect him to pay for consumables. That would include standard screws, nails and adhesives. Obscure screws specific to something being fitted would be down to you. For example in the unlikely event the flooring supplier required you to use a specific make and type of screw to maintain the warranty then that would be down to you. If you can use any suitable screw the I'd say the builder. It's a bit of a grey area if it's not in the contract.

This is what we did... Arched lintels with brick slips. Pointed up after installation. Some windows.. One or two and front door were double arch..

I'm afraid agree with the builder. I would take "Installation" to cover cover labour and consumables like general purpose adhesives but not special flashing kits. In the case of Velux type windows these are typically specific to the window and type of roof tile. That's just my opinion, others may disagree.

It doesn't look like the roof sheeting overhangs into the gutter very much? Could that be partly the problem?

+1 You can get 20mm insulation board. Check floor is level with laser first. If not level use sand.

When you pull a hanging weight to one side the tension in the suspension rope goes up by a factor of 1/Cos(angle), where angle is between suspension rope and vertical. Example.. if you pulled it sideway until the suspension rope is 45 degrees to the vertical the tension would increase by a factor of.. = 1/cos(45) = 1.4 If the object weighs say 100kg then at 45 degrees it's equivalent to lifting 140kg. The force required to pull the object sideways can also be calculated. The same sideways force would be applied to the rafter or whatever the winch is fixed to.

OK so you have.. 150mm -10mm slate -5mm adhesive (more if stone is bit irregular?) = 135mm -65mm screed =70mm available for insulation, DPM and blind. I'm thinking a 20mm closed cell insulation, DPM and 50mm PIR. Not ideal though. We have around 80mm of PIR insulation under our UFH and would definitly put in more if building again. I'd probably aim for at least 150mm. If you really don't want to raise the door sill there are some UFH boards that can be tiled over without screed. They are typically 20mm thick and intended to go on top of suspended timber floors but it might be possible to adapt them for use over insulation or insulation and OSB. No screed required. One issue is that insulation boards don't always lay flat and need screed to weight them down so the don't move under load causing cracks in tiles/stone flooring. https://ambienteufh.co.uk/tiling-over-underfloor-heating/ https://www.wundatrade.co.uk/shop/home/quick-shop/wundatherm-quick-shop/boards-quickshop/underfloor-heating-board-wundatherm-ultimate/ Who is your UFH vendor?

Disabled access ramp to front door wouod have to be a bit higher?

I can't think of any problems that would arise if the finished floor level was above DPC..... after all the first floor is 3m above DPC ?

Either a sand blind or possibly some 25mm EPS would protect the DPM. Could fit some perimeter insulation (blue roll) to protect it if the walls are very rough. How much height do you have and what floor coverings do you need to allow for?

+1 I've only done two floors but would never dry lay the whole thing. Just plan one row in each direction, (eg to decide if a whole tile or a join should be on the centre line to avoid thin cut edges).

https://www.pallantchambers.co.uk/blog_post/july-2021-cil-payment-exemption-is-not-available-for-self-build-houses-granted-retrospective-planning-permission/ 6th July 2021 HIGH COURT DECIDES THAT CIL PAYMENT EXEMPTION IS NOT AVAILABLE FOR SELF -BUILD HOUSES GRANTED RETROSPECTIVE PLANNING PERMISSION UNDER SECTION 73A OF THE TOWN & COUNTRY PLANNING ACT 1990 – Gardiner v Hertsemere Borough Council [2021] EWHC 1875 (Admin), 6th July 2021. Snip The case raises a real problem for self- build developers in that if there is need to apply for retrospective permission during the course of a development, e.g. to regularise some unintended departure from the plans during the course of construction, then CIL exemptions will not apply....

A section 73 results in a new planning permission being granted. You should not do any work on site until its been granted and you have applied for and received the CIL exemption, issued commencement notification etc. If work has already started and the exemption claimed under a previous planning grant then you should apply to amend the existing PP under section 96a (I think) instead of section 73. https://www.planninglawblog.com/self-build-series-part-1/

Normally doors are fitted after the lintel has been loaded/deflected.

I'm going to be planting a Turner's Oak this winter. Is a semi evergreen variety. I'm told the multistem versions don't get too tall too quickly. Bit rare though. Otherwise plant what you like and ignore the neighbours. Walk around naked a few times and they will soon stop.

+1 If you have existing insulation between rafters and only put 50mm above them that would leave the top of the rafters close to the cold side and without ventilation = possible condensation risk. Ideally you need more above the rafters and less below or keep it as a ventilated cold roof.

Sorry if you already know this but the red thing is most likely an expansion vessel. Stops pipes bursting when the water in the heating system expands as it gets hot.

Or just apply for planning for a slightly bigger porch.