What sort of timber under existing lead flashing on porch?

[Min]

The lead flashing on my porch was dressed round timber that's 32mm x 12mm. On both sides of the porch, the timber is rotten and the front piece is missing. Picture shows side piece that is dropping out.

I can't find pressure treated stuff in small enough sizes.

What should I buy and how should I treat it? (Apart from mean to keep it keen )

Thanks
Mary

 

[^woody^]

PAR painted will be fine and last as long as that piece did.

Soak the cut ends in preservative.

 

[foxhole]

You could poke some uvpc trim in there with adhesive , can’t rot .