Screeding up to Floor Boards

[JLAB]

Hi All,

 

Looking for a little bit of advise on how to screed up to floor boards. On the image, the left side is the extension and needs screeding over the PIR Boards, and on the right side is the existing build with floorboards. 

 

How do you bridge the gap when screeding between floor boards and screed?

 

Thanks  

[Russell griffiths]

For a start those wall need lowering and insulation placed over them unless you want a cold spot. 
what’s the floor finish going to be. and what’s the screed thickness. 

[Conor]

From a timber upstand and line with compressible perimeter foam. Then trim flat after screed is cured.

As above, need to sort that wall out, secure ends of the floor joists (add noggins at the end or a trimmer piece as there's noting to stop the joists twisting), fill voids with insulation/foam.

[JLAB]

Thanks for your replies. Updated photo attached showing PIR Boarded with upstands and taped. 

 

@Russell griffiths The wall you can see is the existing external wall. The photo is deceiving as there will be enough space to put 25mm insulation on top of the wall, underneath an extended floor board to bridge the gap over the wall, which will meet a plywood upstand to create a barrier for the screed. The screed is going to be 50mm. The floor finish will be LVT. 

 

@Conor I've got some ply to create upstands which I will then foam. Do the existing pir upstands need foam too? 

 

Thanks 

[Mr Punter]

No, take out at least 1 course of bricks from the old wall and insulate to the same depth as the rest of the floor.  25mm insulation will leave a cold strip.