PeterW

So the question is .... You employ a brickie, a joiner and a roofer. None of them are on site together so none can be classed as "Principle Contractor". Do you end up with 3 "contractor" arrangements..? I do love the last line in the guidance as this is exaclty how issues occur Any designer in charge of coordinating and managing a project is assumed to be the principal designer. However, if they do not have a written agreement with the domestic client to confirm they are taking on the client duties, those duties automatically pass to the principal contractor. So basically HSE and GovUK have shafted principal contractors as they have no escape ..! If what @B52s says is correct, and architects etc don't carry the PI then by the architect NOT doing something (i.e. Not confirming they are taking the PD role) then the principal contractor is shafted by default ..!! I wonder how many principal contractors are unwittingly doing that as the architect/designer hasn't made that clear ..???!

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Yep but no double dip for Trade Card holders ....

Sorry missed this..! so are you having a 500 buffer and a 500 UVC..?? 47c is barely hot enough to get most of the blending valves to operate so you probably want Immersions to take this up to 56c (and 65c once a week) and that floor plan has lots of pipe - 100mm centres..??

An 8 port and a 4 port in tandem will fit with elbow on the corner - that shouldn't need much engineering to fit it and will be simpler than trying to cross over multiple pipes if they are above each other.

Yep pretty much - gave a nice level surface to tile onto. Wires were 4mm from memory and it was easier than using adhesive.

Sorry - self leveling compound..! And yes, keeps the tiles toasty warm but only comes on for an hour in the morning and an hour in the evening.

Thanks - smack bang in the middle so probably a bit far but thanks for the offer ..! Have ordered the Tacwise ones to give them a try

I service my own gun so that's not a problem - always use genuine parts and it's 10 years old and still going strong. Just noticed Paslode gas is now £16+ a cell and I'm sure there are ones just as good.

Mine are 15mm and 13mm respectively ... That is 5mm ish of floor heating with SLC over and then one with a 6mm porcelain and one with a 8mm ceramic tile on a thin bed of adhesive. SLC bed makes laying them a doddle as it's perfectly flat.

As it says - anyone got a good source for the fuel cells ..? I've got plenty of nails but the gas went ages ago. Seen a few alternative types such as Tacwise and Firmahold but just wondered if anyone has a recommendation ..? Or a source of cheap cells ..!

900 x 2050 on all ours ...

A dog ... https://www.cylinders2go.co.uk/shop/vented-cylinders/indirect-vented-copper-cylinder/telford-1500-x-450-indirect-vented-cylinder £245 inc the VAT...

Gotta ask... why not use a lintel and be done with it as it's insulated and warrantied to work..? And don't all new RSJs need to be from a certified source now ..?

Yes - any walls inside the building that are load bearing ..??

Ask @Nickfromwales as I think he did one like this. Only need one pump.

I tend to use 50mm architrave and 5mm of frame normally so I'd be at ~950mm plus any gaps. Still means you need a decent gap to get a door back to 90 degrees and a big plus 1 to door stops ..!!

Two manifolds can be joined with a couple of brass elbows. You can go round a corner then ....

Still a bit pricey but better..!! I'd have a bit of a ring around - how many metres do you need..?? Not forgetting any inner supporting walls..?

Who is your Builders Merchant and where are you based...? If you can get away with a concrete common then use that.

Lead Sheet Association is your friend..!! http://leadsheet.co.uk/home/lsa-pocket-guide/pitched-valleys/

TP do them in 140mm - Only linked that to show what you need to look for which is a 65mm Coursing Block. You can use concrete commons as I said before but they have no thermal performance to speak of so it depends what you want to do in terms of thermal performance. I would expect that the BCO or SE for the TF company will spec the compressive strength of the blocks for the ring anyway - 3.6N seems to be the minimum these days. Those are also vastly overpriced - I pay around £220 / thou for 100mm and £285/thou for 140mm concrete commons.

Said every self builder ever, when justifying the latest tool purchase to the project accountant......... And never selling a single thing, just in case !

TP stock coursing bricks in Celcon specs - 600 in a pack so thats enough for 67m of two courses to bring you up to the 140/150mm level. https://www.travisperkins.co.uk/H%2BH-Celcon-Brick-Standard-Coursing-Unit-65mm-Pack-of-600/

Get a new BM... 140mm blocks are common - they are used in flanking walls and are a standard detail.