External fire doors with low u value

[makingprogress]

Building Control are insisting we have a fire door on our utility room to the outside. It's a bit odd, but they are being reasonable following an architect mess up.

 

We can find plenty of external fire doors, but struggling to find any with a u value below 1.2. Thermal efficiency is a key aim for our work so this is important to us.

 

We have a number of queries out, but any recommendations would be warmly welcome.

 

Thanks

[MrWhat]

Hi makingprogress, did you have any luck with getting a low U value door?  I am looking for the same for an linked garage and I can only find a steel 1.3 W(m2)k so far

[Dan F]

11 hours ago, MrWhat said:

Hi makingprogress, did you have any luck with getting a low U value door?  I am looking for the same for an linked garage and I can only find a steel 1.3 W(m2)k so far

 

Look at the "Moralt Ferro" range they are low u-value, airtight and fire doors.   Lots to choose from with u-values all the way down to 0.54.  We went for the non-passive one with u-value of around 1 though as looking at big picture it wasn't worth paying a lot for a super-low u-value.

[Dan F]

If i remember correctly we got ours from https://www.lathamtimber.co.uk/   They were also able to provide all the necesary fire certs for building control.   In our case it was for door between house and integral garage.

Edited March 1, 2024 by Dan F