Hi all.
I've been searching T & P's site and see they have 38mm x 300mm
southern yellow pine...also 25mm x 250mm.
Is this SYP the right stuff for the string and treads?


Yes thats right.

I went throu the same process last year, just making a 3 tread stairs
to an outside door.

Went to Jewson Ltd and I nearly fell off my perch when I was told the
price. Asked for offcuts, but they were so split and twisted, it made
think what happens to the real mckoy.

So I forgot that idea and got some 'pine' at 175 wide, that had been
tanalised, and glued and screwed them together from the back.