On 2005-03-01, homeowner wrote:

If you think about it, I believe you'll find that "new nosing = old
nosing + laminate overhang - laminate thickness". The "- laminate
thickness" part is based on using a finish laminate riser.

But the noses are between 1/4" and 1/2" for laminate nose pieces at
HomeDepot. I must checked more than 10 types, and did not find any
big nose.

I'm not sure what the cross-section of the nosing looks like. Does
this diagram represent what you are planning to do? (Use a fixed
width font to view it.)

----------------------------
laminate ! \
---------------------- C |
! |
rough tread ! /
----------------------------
| | |
| A | B |
| | |

A = rough riser
B = finish riser
C = nosing piece

If so, then the nosing piece just has to be thick enough to cover the
thickness of the rough tread. I'm not sure what dimension you are
measuring as 1/4" or 1/2".

Cheers, Wayne