Backer board outside

[Pocster]

Got to box in some external pipework . Planned to make a timber frame and then fix tile backer board to it ( I have plenty spare ) . I assume backer board externally if not exposed to the elements is ok ?

[Onoff]

Just make sure it says for exterior use. Don't forget anything outside will be rated for frost proof etc whereas stuff in a bathroom wouldn't need to be. For example:

 

https://www.knauf.co.uk/store/aquapanel-cement-board-outdoor/c-23/p-555

 

[Pocster]

13 minutes ago, Onoff said:

Just make sure it says for exterior use. Don't forget anything outside will be rated for frost proof etc whereas stuff in a bathroom wouldn't need to be. For example:

 

https://www.knauf.co.uk/store/aquapanel-cement-board-outdoor/c-23/p-555

 

Got it ages ago for the bathroom . No packaging . Think it’s called delta board . No idea of spec - but if sold for bathrooms assume not rated for frost proof . Best not use ? . It’s outside but below ground ; so frost much less of an issue . Or just use some osb ?

[Pocster]

This looks like it 

 

 

says temperature range from well below zero . Reckon I’ll be ok with it .

[Onoff]

Says it's used for "exterior cladding" so all good imo:

 

[nod]

8 hours ago, pocster said:

Got to box in some external pipework . Planned to make a timber frame and then fix tile backer board to it ( I have plenty spare ) . I assume backer board externally if not exposed to the elements is ok ?

The backer will be ok 

But you will need to PU glue ALL edges and trim back the following day