Gazza1980

Apologies, I misunderstood your question. Here's my revised response! Ah, yes, my mistake! I'm laying Woodpecker laminate flooring directly on top of the screed. But, the flooring is lower than the lowest edge of the door frame. So, I'm planning to install an small oak step at the bottom of the door opening - so, directly over the top of whatever I use to close the cavity. Otherwise, the Woodpecker would run up to the wood and foam beneath the door frame, and this would be visible.

Hi, the door was installed on top of several wooden lengths, laid perpendicular to the brickwork, and then filled with expanding foam. Ah, yes, my mistake! I'm laying Woodpecker laminate flooring directly on top of the screed. But, the flooring is lower than the lowest edge of the door frame. So, I'm planning to install an small oak step at the bottom of the door opening - so, directly over the top of whatever I use to close the cavity. Otherwise, the Woodpecker would run up to the wood and foam beneath the door frame, and this would be visible.

I like this idea. Thank you. Would you PIR to the bottom of the cavity?

It's a screeded floor, Mr Punter. It's about 70mm thick, on top of PIR board and DPM.

Hi, does anyone have any tips on how to finish the cavities left behind by an inept door installer? As you can see, the doors have been mounted on the outer leaf of the external walls. They mounted the doors splints of wood, and squirted expanding foamed in the gaps. What they didn’t do is to install a cavity closer before installing the doors. So, I’m now left in a quandary as to what to do. Some builders have suggested filling the cavity with concrete. But, this would cause cold spots, cold bridges and also lead to damp issues. Other builders have suggested removing the top row of bricks, filling the cavity with fibreglass insulation, and then reinstalling the bricks at a 90-degree angle to create a cantilevered cavity cap. So, what is my best option in this instance? Can you think of alternative solutions? I should mention that the cavities are around 60mm wide and about 600mm deep. They are also a bit of a mess, with wall ties, rubble and such like here and there.