I have a large steel to install to the back elevation of the extension. The SE has specified block on side to the internal leaf and standard blockwork on the outer leaf. The extension is of cavity construction formed of dense concrete blocks.
The brickie (after asking me) has formed the reveals by returning the inner skin to the outer rather than using an insulated cavity closer. I found the cavity closers very flimsy when I did the front and the doors being installed here are large, heavy and need decent fixings so I had thought solid dense blockwork piers would be ideal.
I understand the theory behind thermal bridging but given that the rest of my house together with most others of its age were all constructed in solid brick walls so is this any different.
I then worried the BCO would condemn it on this basis but he didn't. Now i am concerned over future issues but am I doing so for no real reason. What is the likely hood of mould/condensation on this reveal in the real world rather than a thermal model?
What would you do?
1) Leave it as it is - it poses limited to no risk
2) Cut out the mortar joint between inner and outer skins and pack with 10mm or so of foam insulation
3) line the inner wall to this reveal in insulated plasterboard
Photo and sketch of what has been installed below any real world advise greatly appreciated;
The brickie (after asking me) has formed the reveals by returning the inner skin to the outer rather than using an insulated cavity closer. I found the cavity closers very flimsy when I did the front and the doors being installed here are large, heavy and need decent fixings so I had thought solid dense blockwork piers would be ideal.
I understand the theory behind thermal bridging but given that the rest of my house together with most others of its age were all constructed in solid brick walls so is this any different.
I then worried the BCO would condemn it on this basis but he didn't. Now i am concerned over future issues but am I doing so for no real reason. What is the likely hood of mould/condensation on this reveal in the real world rather than a thermal model?
What would you do?
1) Leave it as it is - it poses limited to no risk
2) Cut out the mortar joint between inner and outer skins and pack with 10mm or so of foam insulation
3) line the inner wall to this reveal in insulated plasterboard
Photo and sketch of what has been installed below any real world advise greatly appreciated;