There has been a story about Mybuilder and one of the other ones on BBC 1 this morning - the consumer program. Both homeowners had employed builders from the sites and both had made a disastrous, very dangerous mess of the major works, taking the money and disappearing. Both homeowners are facing bills higher than the original costs of the works, to repair the damage done to their homes - many thousands of pounds. The websites take no responsibility for any of work done. I don't think the program went far enough, in outing these sort of sites, which have suddenly appeared.
Positive reviews on those sites are completely meaningless, when negative reviews are simply deleted as quickly as they appear. He was obviously not a tradesman, just a botcher with a little knowledge and I would be very suspicious of the work he has done to repair your original issue.
Sorry you have had to find out the hard way. Can you back charge him for the plumber at least?
Cheers - I (as a layperson) got the impression that he was really geeky about the electrics but hated all the other bits involved - he was telling me he just does small jobs by choice (this was originally supposed to be just changing some switches and a pull cord) it was clear that the process of lifting up floorboards made him quite flustered.
The plumber was actually in for another job and said that the pipe was only scuffed and didn't need anything doing so I haven't been charged for that.
Again as a lay person it's really difficult to make decisions, I got a handyman in to do loads of jobs, he was seemingly really knowledgable about everything but he clearly just lost interest towards the end of the week and his work got worse and worse to the point he filled missing plaster on our wall with bathroom silicone.
Also re: regulations such as where to drill holes in joists and how big they are allowed to be - it's impossible to have a comprehensive understanding of all these before someone gets to work, it's only in retrospect, and when things are obvious.
I will be putting in some new floorboards to cover the damaged parts when I get new carpet in a couple of month's time so I think I will try to calm down and put this down to experience.
It's not difficult to set a circular saw, so it only cuts through a floorboard, but I suspect he wasn't a circular saw at all - he more likely drilled a hole and used a jigsaw to cut around the 5" diameter.
Any chance you could provide a photo?
Can you see this?
https://photos.app.goo.gl/zfTzAxAE8CFXGf6c7
This shows one that's been put back in (this split) and one that's been left off (where I was waiting for the plumber to come to check it). Sorry when I said circular saw I meant an attachment for a drill that cuts out a circle with a hole in the centre.
A slightly separate question: The other thing I'm now slightly anxious about is the holes in the joist where the wires are fed through - just been reading about the areas where building regs say you can drill - between 0.25 and 0.4 of the length of the joist? How does someone know the length of the joist i.e. if they span a single (3m) room or the whole of the floor to calculate where they are able to drill as this would affect where this section was located? They look sensibly sized for the wires.
If I hadn't been so involved in the process he'd have put the carpet back himself and I'd probably never have known or been anxious about any of these things - ignorance is bliss etc etc.