Cavity closer between Sips panel and Block skin

[Rudski]

It's a long while since I posted on here and got some great advice regarding ASHP etc, well I'm deep into construction mode and now getting into the little details, but very important details all the same.

 

My blockwork sits 22mm below the sips panel frame as per window designer and architects agreement, I need fire rated cavity closer and I'm in the process of about to order which has led me down a rabbit hole, if I use a cavity closer like this attached and recommended by the companies tech department then it wont sit straight in the cavity, is this acceptable or would i then just use a compriband to pack it up which means its not really doing what it should be.

 

I've attached the window drawing and what's been suggested to use, is there something else out there that would fit the remit required.  

 

I'm trying to get an answer from my architect but having no luck currently, any pointers much appreciated

 

Cheers

Mark

 

Window Sketch KF.pdf