Changing door to window. What insulation?

4D82

Hi all, I’m changing a back door and side panel to a window. 

The house has cavity wall insulation installed. What insulation should we use between the bricks and blocks underneath the window? 

Any advice is much appreciated, thanks.

stuart45

Probably cavity batts would be your best bet. Do you know the type of insulation and size of cavity?

4D82

Thanks for the reply 🙂 the bricks have been laid with brick ties and so can’t put cavity batts in

stuart45

Batts are easy to cut to get inbetween the ties. As long as you butt them up to each other they will be fine.