Normally do this with 1 watt leds designed for external use.
Drivers in the loft.
https://allledgroup.com/midi-1w-led-350ma-ip65-marker-light-polar-white-3000k
Cheapest thing to do is take the roof off and fit attic trusses then replace the tiles. You never going to adapt existing trusses there just not designed to take the floor loading.
Back in 2021 I did this the new attic trusses complete with metalwork, ladder sections etc cost 16k for a 10mtr...
I'm bored so I'll dispense with the bullshit.
Boiler discharge shouldn't be put into waste should be run outside in copper. Or on a dedicated connection ie not shared with anything direct into a soilpipe.
All unvented cylinders come with the expansion vessel when new. Although if you get a...
The most important factor and forgive me if you have already stated it, is the pressure and flowrate of the incoming water main.
Amount of time I see and I have been guilty of installing big combis on poor mains. There's quite a pressure drop through the intergas dhw pipes they won't really...
Intergas boilers do suffer from cold hex scenario. For example the dhw works a lot better if you have had your heating on and there is latent heat in the main exchanger. Yes the hot water will work on its own but your heating the entire block to heat the small dhw pipe. Oh my god the extreme's...
Vado are the best clacker wastes you can buy can get them cheaper on ebay.
https://www.ebay.co.uk/itm/185929513207?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=72ASpvVkQea&sssrc=4429486&ssuid=SWtYFfYpSAa&var=&widget_ver=artemis&media=COPY
They sell long 15mm by 10mm reducers end feed of solder ring there long enough to go into standard 15mm valves then onto your 10mm pipe.
https://directplumbingsupplies.com/product/15mm-x-10mm-end-feed-long-tail-fitting-reducer
Just be careful there's no mortar exess as it may stop your next row going in on the right spacing. I've just used the spinners but I think I prefer the wedges. As the spinners snap the clip. If you really torque them up.
I looked at brickslips and lime rendering but by far the cheapest and fastest thing to do is dot and dab cement board then sheet up and spray it all with vht spray paint make sure you have a respirator on though. My front edge is easy fill where it meets the cement board been in two years had no...