Hi,
My builder has built a brick brick cavity wall and filled the cavity with celotex CG4000 and it meets the required U value, but hasn't left the 25mm airgap between the insulation and the external course. There is 10 - 15mm. Building control say I must rebuild with the 25mm gap. My builder doesn't want to do it.... Has anyone any idea how to get around it and keep building control happy?
Thanks
Ken
My builder has built a brick brick cavity wall and filled the cavity with celotex CG4000 and it meets the required U value, but hasn't left the 25mm airgap between the insulation and the external course. There is 10 - 15mm. Building control say I must rebuild with the 25mm gap. My builder doesn't want to do it.... Has anyone any idea how to get around it and keep building control happy?
Thanks
Ken