Dave Jones

also depends on the type of road, major A roads could be 5 figures to permit, traffic management, sunday working etc . good luck getting them to share a trench on the same day. Never had any luck with that as the firm that seals the trench is also responsible for maintaining it for 5 years after.

if you wanted bankrolling i'd hope the builder increases their margin accordingly. Fortunately they are in a good position to pick their customers.

its because there isnt one trade responsible for air tightness. The buck just gets passed as its labour intensive to get right. I'd insist on a pre-plaster air test to confirm everything is going to plan so corrections can be made while they still can. or the easy option you do it yourself.

make a liner either out of 2 normal ones joined together or use a sheet of mdf and make your own to size.

what about taking out the blocks in the floor and replacing them with insulated ones https://www.cellecta.co.uk/product/tetris-beam-and-insulation-on-block-system/ your bound to have some that you cant as walls will be built but it would be a neater solution and no problems with messing with DPM.

your going to have the same issue as the other guy here trying to do the same thing. you somehow have to get a continuous dpm below the insulation lapped into the inside skin. somehow need to keep those blocks dry after covering them with insulation.

most reputable builders would expect materials to be paid for at point of order. They are not there to bankroll your build.

depends which way they laid the blocks, if its longways then you need to be skinny <200mm You will also be comprimising the DPM. What reason do you have for accessing it ?

it would give it that nice housing association look where they have done this to council houses.

you also need to find out if the builder used block and beam due to ground conditions. e.g. heave. do you have ceiling height to raise internal floors ?

irrelevant, boards are cheap and easily cut. wood for the trees etc.

western power will only install 3 phase on new builds. You can opt for a single phase meter if your not going to be using the capacity. I had same problems with EDF, key is to raise a formal complaint at the first opportunity. You do get callbacks then as its monitored/'tracked.

allways space the trusses so you have 400 gaps not centres, it may mean an extra truss to complete the run but this will be more than paid for in the un-wasted offcuts.

what m2 cost are you budgeting for out of interest ?

matches perfectly with that shocking brickwork.

missing the edge trims, how have the flashed it into the wall ? https://www.rubberroofingdirect.co.uk/buy-flexiproof/epdm-edge-trims.html Whats with that downpipe ?

sand it ? Looks like they did the lazy approach, old blade and a single pass. They on a price ?

depth

overthinking it. will look good when its painted.

i find the fischer hammer in fixings are really strong for fixing liners to blocks. https://www.fischer.co.uk/en-gb/products/frame-fixings/hammerfix-n/hammerfix-n-s

crack on. you dont need a VCL with a cold roof. yes the insulation is not going to be as good as a sealed warm roof but you are where you are.

leave the felt for your shed. The correct detailing for a parapet is here https://nhbc-standards.co.uk/7-roofs/7-1-flat-roofs-and-balconies/7-1-17-parapets-and-guarding-to-terraces-and-balconies/

another vote for alutrix. be sure to bring it down onto the internal walls.

any evidence to back that up ? Used on massive infrastructure projects, unless of course you are saying the SE's who design and spec them are wrong and they will fail.

yes external door frames come with a cill.