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

 

 

 

 

No, you can use timber.  You may need 38 x 63 cls to go round the opening between the blockwork and the SIPs.  Fit them before the blockwork goes in.

Thank you Mr Punter

 

It was my architect that put doubt in my mind about using timber, my BC guy had already intimated that timber is acceptable, I will double check though, it will make life a lot bloody easier!

 

 

 

 

Yes use treated timber.  You will be able to sit the window on it.  You can fix to it as well if it is OK to screw through the frames.