Green Treated Timber for Window Boards

[rideforever]

Need some external window boards round a dormer window, and also behind the guttering at the roof edge of a pitched roof.
Can I use these they are quite cheap, I'd paint them.

https://www.travisperkins.co.uk/treated-timber/22mm-x-150mm-x-3-6m-green-treated-board/p/944383

If they are suitable, I would prefer them over plastic / MDF, and they are cheaper then other planed timber ??
Cheers

 

[foxhole]

They are rough sawn . (Mdf can’t be used on exterior )

 

[rideforever]

They are rough sawn . (Mdf can’t be used on exterior )

thanks - so is that okay then ? I guess they are meant for the garden but if they are painted then it's all the same or will they crack or something ? Atleast they are treated ...

 

[foxhole]

thanks - so is that okay then ? I guess they are meant for the garden but if they are painted then it's all the same or will they crack or something ? Atleast they are treated ...

No, they are not suitable , unless you want it to look like a shed .