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thanks to both of you .... some nice reading for me here ;) Stuff here I hadn't considered, but once you get down to the maths its fairly straight forward really.

I've just had the calcs back from our SE for an RSJ to put in an opening. Nice document which very clearly says what I need to know ... "use a 152 x 89 x 16 UB and mount it in xyz pad stones", and what BC will need to know .... lots of numbers about load factors, buckling resistance, bending...

Thanks to everyone that replied .. didn't mean to start such a long discussion :) I checked again tonight and after I pushed the inner seal flat with the wall the draft has definitely gone. Still tempted to pull the seal back, fill the gap then replace the seal next time I've mortar mixed up...

In which case why do Alpha say otherwise? I would have thought that the manufacturers and regulators would be saying the same story (mind you I also wonder how the major DIY stores can get away with selling things like 17th edition consumer units. DIYers going to the bother of doing it right...

Thanks ... the installer didn't leave the installation instructions - just the operating instructions. I've since found these on the web and have had a read (what's that they say about a little knowledge being dangerous ? :) ). There was a rubbery seal on the outside as well .. but I can't...

Alpha CD18R. We've an existing CO alarm in the room (Kitchen) - so I just checked the batteries weren't flat in this. I pushed the plastic flange to make it seal better with the wall (before you could see a 2-3mm gap at the bottom). It *could* be air from the cavity I can feel, I'll get a...

I've finally have a new condensing boiler fitted and all it working well. Tiding up the area in preparation for fitting a cupboard round the boiler I noticed that where the flu and drain go through the wall the gap between the brick and the pipe haven't been filled ... just a rubber flange...

Why do people insist on putting reals of PTFE tape on compression fittings? Had the father-in-law over at the weekend to help out and within 5 minutes he'd popped out to B&Q and came back with 2 rolls (yes .. 2 rolls!) of PTFE tape and a pot of that nasty boss green stuff. I was always told...

I'm currently preparing a building regulations application to move one of the exterior walls of our kitchen. This wall currently has an existing double glassed window which is about 12 years old (and matches the rest of the downstairs of the house). As there is nothing obviously wrong with...

Thanks .... sounds like I need to find myself a sparky and talk him through my plans.

So I'm in the process of a major kitchen refit. Everything is changing so it will be a complete rewire. As I'm not made of money I'm looking to see what's the most efficient way to do things. Option 1 is that I do all the electrics myself and get BC to sign off ... this would be the...

Money is tight so I'm looking at installing as much of our new boiler as possible. The boiler is moving location .. so it's new boiler, pump, values etc. I know I need a Gas Safe guy to run the gas pipe and make the gas connections to the boiler. Assuming I already have an existing power...