The difference between DIY and professional towers is like chalk and cheese. Don’t get me wrong, I was going to get a DIY one but the trades wouldn’t have worked off it. I think someone on here said they sold their’s for the same as they paid second hand, so I bought a professional tower. Trouble is, I don’t want to sell it …
Have you considered flipping the bedroom layout so your bathrooms are over the utility? Reduces pipe lengths, hot water losses and unwanted noise in living areas.
Nail gun is much faster for large repetitive jobs but expensive and not much gain for smaller jobs. Strength depends as much on the joint as the fixing but screws generally equal or better than nails.
‘Other suppliers are available’ (Pears and TK for examples) all use similar tools. Saves doing the Math and gives you lots of detail including 2D & 3D images. I ended up with 39 degree pitch which was more than I wanted having failed to identify the constraints at design stage. Having said that, it feels ‘right’ now it’s finished.
Only appliances you can reclaim VAT are extractors or hob with built in extractor. Don’t believe suppliers can zero rate any part of a kitchen unless they are fitting it, ie. you should pay the VAT and reclaim it at the end.
We only had a porta-loo for welfare, no mains water needed for ground works. If they need water for washing down, ask them to bring a bowser, they will be used to working on unserviced sites. Alternatively have you got friendly neighbour with a hose pipe?