C16 joists - Treated or Untreated?

[iDIY]

Hi guys,

I am at the point of fitting floor joists but as it’s a self build and given the time of year they will get wet several times before the roof goes on.

Can I and should I fit pressure treated timber rather than untreated?

 

[Notch7]

many merchants only stock treated and there is almost no price difference.

get treated

 

[^woody^]

Getting wet whilst being built won't make any difference to untreated timber. Mould and insects don't work that fast, especially over winter.

 

[catlad]

Yes well woody that depends how many years it takes to complete

 

[^woody^]

I best not ask mrs woody to comment on this.

 

[catlad]

Your mrs and my mrs could probably have a right good rant!

 

[John D v2.0]

agree with above posts, but one point is is it ground floor or over a heated space? or upstairs ceiling joists? you're supposed to use treated anyway for anything over unheated space or roof/ceiling under unheated space.

 

[^woody^]

Your mrs and my mrs could probably have a right good rant!

I'll make a garden fence.

Or maybe not.

 

[^woody^]

agree with above posts, but one point is is it ground floor or over a heated space? or upstairs ceiling joists? you're supposed to use treated anyway for anything over unheated space or roof/ceiling under unheated space.

Iirc, the guidance is to use treated where timber may be susceptible to damp and where their replacement would be impractical.

And in the home counties where beetle attack is prevalent, regardless of damp.

 

[John D v2.0]

Iirc, the guidance is to use treated where timber may be susceptible to damp and where their replacement would be impractical..

Thanks woody, although once people raise the patios over the air bricks and the roof starts leaking they'll be damp I'm sure!

To be fair, if you raise a timber off the ground out of the direct rain fall, it'll dry out and then never really get damp enough to rot in the long term.