plastic pipes

Looks like a lash up to me.

 

That looks perfectly normal for plastic pipework.

The plastic strangler obviously can't solder looking at the joints in the pics...Copper is proper.

 

Firstly theres nothing wrong in installing plastic pipework, provided its correctly installed,
I install both copper and plastic they both have there benefits.
The biggest thing with installing plastic pipework is supporting the pipework adequately,
Using the longest lengths of pipework possible minimizing the amount of fittings used, so improving flow rates.
Not having to tight a bends in the pipework.
When drilling through joist allowing enough space around pipe for expansion,
The big thing is you need a reasonable amount of space to install plastic pipework, otherwise it will always look a lash up,
What youve got is unsightly, im always dubious of installers who think its ok, its under the floor no one will see it,
It should always be neat and tidy where ever you install your pipework,
So just being water tight isnt enough, or am i just a dinosaur of a tradesman
i would ask your builder is it cheaper if installed looking like this rather than being neat and tidy.

 

There is more hole than wood in that joist.

 

i did notice that lol
also no metal plates over plastic pipe where they are notched out in joists

 

i think my trade is the worst in the world for encouraging idiots to call themselves a heating engineers or plumbers,
anyone can join the pipes but its knowing why

 

i think it comes under good working practice and is recommended by the manufacturers
we always use them

 

Yes it looks hellish. But, no, I don't think it's under any particular stress, and I wouldn't expect any fittings to come loose as a result.

Darren says it all - plastic gives some people an excuse to be lazy and still call themselves a heating engineer.

Plastic has some huge pluses, tho', the biggest probably being that you can drill holes through the centres of joists where they don't weaken them and pipe runs are safe from nails and screws. To be fair, it looks as tho' your guy has indeed done this, and only used a top joist 'notch' where it probably existed before for a copper pipe?

It is sloppy work, tho' - leaving all these pipe runs lying loose is chust nuts! You were almost bound to have 'hammer'.

Even tho' plastic pipe is far better insulated than copper, wh'y hasn't he slipped on cheap foam lagging? It'll add further insulation, but also cushion the pipe from unwanted movement.

Protection plates over notches would have been a positive sign of good workmanship - so it's no surprise this guy didn't bother...

Mayo, it's indeed sloppy, but unfortunately just about acceptable

 

You could complain about the clip spacing, it should be 300mm in a horizontal run as recommended by the manufacturer

 

I wouldn't worry about that.

 

TBH although the work is sloppy (not removing the old dead pipes, fittings, no nail plates etc.), You have two problems that are more pressing than the plumbing - the joists and the quality of the electrical work. When you see connectors like the one circled in the top left, which haven't been closed correctly, it does cause concern. Also seeing all those cables bunched up does raise the risk of a lot of heat building up. I would get an independant electrician in to have a look. Whoever ran the cables has severely weakened the the joist by the number and size of the holes in close proximity, the electrician will probably give you a view point on this as well

 

Out of interest, what plates do you guys normally use to protect against nails?

 

http://www.screwfix.com/p/sabrefix-protecta-safe-plate-galvanised-45mm-x-90mm-20-pack/30038

Something like this - but you have to be careful because the underside has teeth that don't want to puncture your pipe

 

Oh how we'd laugh if...

(I'm ashamed...)