Problem with Internorm door HF310

[Rob Johnson]

Dear Internorm.docxDear Internorm.docxDear Internorm.docxDear Internorm.docxDear Internorm.docx

 

Thermal Imaging identifies glaring cold line at the bottom of the door.

[IanR]

What were the outside and inside temps? 

Not sure that ~16°C in a corner is that bad, if it's close to freezing outside. What's under the door threshold? Is it block & beam on a strip foundation, similar, or an insulated raft?

 

A quick calc has the inside face of the door at 16.7°C with an outside temp of 0°C and inside temp of 21°C for a door frame with a 0.86 U_^f value. With a little thermal bridging that could easily drop lower.

Edited September 17 by IanR

[Conor]

If the door is sitting on a concrete beam/slab that's bridging from the outside to the inside, that easily explains the heat loss at the bottom. Can you remember the buildup?