[quote author=thescruff link=1126096360/15#18 date=1139940945]Scaffolding you cannot do [/quote]
Unless you get a propritrary (sp?) tower scaffolding system. But they have limitations.
Quote:windows and doors have to be approved
Only in terms of double glazing and that doesn't stop you DIYing it and getting BC to check it out. FENSA is only about the DG unit's being up to spec, not the actual installation of the windows. They could fall out the day after installation but they would still meet FENSA specs.
Quote:pitching roofs a no go unless your a chippy
You do need to get it right, but the architect should have produced the plans to show everything. Waste wood might be a bit high though. You could cheat and do like many other builders and get a trussed roof.
Quote:running around on roofs can be an occupational hazard, that the insurance co may not be happy about.
Get the insurance, it will still be necessary for the whole site anyway.
Quote:inside, no longer can you do electrical work unless you have the tickets
You can still DIY, but you'll need to tell your local BC beforehand and get them to check it out.
Quote:joinery is part of the end product so needs to look good
If you'requite good with wood then try it. If you can't even cut a straight line with a saw then don't bother. Only you know how good you are and what you're capable of doing.
Quote:fitting gas boilers I would not recommend, plumbing is also part of the end product.
But you can do the wet parts of the CH system and the DHW side.
Quote:And anyone can swing a paint brush, but a good decorator at this stage provides the quality finish to all the trades.
Don't get a painting party in to finish it off. Drunk people trying to paint is not a good idea.
And if anything, before you start anything read read and read again. Get books, read the net, ask anyone and everyone. Think it all out beforehand, then go though the motions as if doing it to get it right in your mind, then think again, then try it out before doing it for real.
After I've said all this, in your case swimmer I would still get a builder into to do the work. The best time to learn is before you do a major job like an extension. What you can do, and this will help any builder, is to tidy up every evening. Clean out all the rubbish, make sure the materials they need are in place ready for them and make sure nothing is in their way.