Nik Nak

Firstly, thank you all for your responses. The drawings you see were provided by an architect on A3 size paper and the hand drawn diagram is when I asked for further detail. The foundation has already been laid at 450mm where the stonework is going - The idea of the stone addition was for cosmetic appearance purposes - although judging by some of the comments maybe I should increase the insulation and do away with the stonework and perhaps just render? Although don’t really want to go through planning again... Unforunately I cannot get a drawing from the architect to show the build up above the proposed rsj.Either way it looks as though the general consensus amongst the responses is that I should increase the insulation to i. e 100mm ? Do you think I could make the wall the same thickness as the rest of the build and either just render or use a stone slip for cosmetic purposes ? If I do it this way then will the 50mm insulation on his sketch be adequate enough ? At least this should solve the problem with the initial rsj problem to 450mm thick wall. Any further thoughts or comments would be appreciated. Has been a bit of a nightmare dealing with drawings showing minimal detail. Thank you all again

Hello I know this topic has already been extensively covered on the forum but there is however a slight variation which i am looking for a solution please.I have spoken to two builders who cannot provide a suitable explantation. Overview Proposed new build extension (drawing below) with 3600mm x 2100mm opening to accommodate bi-fold doors. I have been advised to have a rsj installed above the doors due to weight of roof design. 450mm thick wall construction details as follows (photograph below) Outer 150mm facing in natural stone 100mm block 50mm void 50mm insulation 100mm block The drawing (below) is from an architect.He has not provided a drawing where to position an rsj above the intended bi-fold door. Speaking to a couple of builders they suggest a wide steel plate be welded to a rsj in order to achieve the required width . My questions are - Although feasible - this would not stop thermal bridging? - Where would the bi fold doors sit in relation to the stone / block work - would this also be an issue? Any advise or comments would be appreciated. Thank you very much for any assistance