Osman

Thanks, would I need to wrap the PIR in DPM or would the foil be enough?

Thanks for all the steps here, very helpful, should a DPM be installed at any stage here to wrap the EPS? and would PIR also work as Big Jimbo suggested in his comments?

Good evening everyone, I wonder if I can get some help/thoughts on how to finish the below: I recently got a room renovated in my 1930s house, at the end of the room an extension was done sometimes in the 50s/60s, the extended part has a patio door which was recently replaced with a new bifold sitting on the outer leaf. The workman put down new joists (suspended timber floor) and the joists was run resting on the inner leaf of the masonry as in picture. Also, telescopic vents were installed under the bifold which crosses between outer and inner wall to help with subfloor ventilation. I now have the cavity to finish, so I can run the floor (chipboards/plywood bords) going all the way up to the bifold door, the workmen suggested no need for cavity closer when they did the work. I am unsure how to finish off the cavity up to the bifold to avoid cold bridging and any damp. I am concerned the plywood/chipboard in that area will build up mould. What is the best approach in this situation, all thoughts are much appreciated.

Good evening everyone, I wonder if I can get some help/thoughts on how to finish the below: I recently got a room renovated in my 1930s house, at the end of the room an extension was done sometimes in the 50s/60s, the extended part has a patio door which was recently replaced with a new bifold sitting on the outer leaf. The workman put down new joists (suspended timber floor) and the joists was run resting on the inner leaf of the masonry as in picture, is this correct?. Also, telescopic vents were installed under the bifold which crosses between outer and inner wall to help with subfloor ventilation. I now have the cavity to finish, so I can have the floor going all the way up to the bifold door, the workmen suggested no need for cavity closer when they done the work. I am unsure how to finish off the cavity up to the bifold to avoid cold bridging and any damp. What is the best approach in this situation, all thoughts are much appreciated.