On Jul 9, 3:19*am, Borrall Wonnell wrote:
Hi all,

I've got 7 steps in my concrete-floor basement leading to a landing.
Now I'm adding a subfloor with a height of 1.25". *Stair stringers
will now rest on top of the subfloor. *Which is the best option?

1) Do nothing, (top step height reduced by 1.25")
2) Cut 1.25" off the bottom of the stringers (bottom step height
reduced by 1.25")
3) Cut 0.75" off the bottom of the stringers (0.75" reduction on top/
bottom step)
4) Build new stringers, adjusting each by 3/16"
5) ??

I'm slightly loathe to do #4, given my construction skills and the
relatively easy 'fixes' proposed in #1-3. *Thoughts?

Stairs with one odd riser are dangerous. That riser is known as a
"tripper" for very good reasons. My BIL built a log house in Canada
back when and due to logs shrinking as they dry, the second floor kept
lowering. He had a 'tripper' in the stairs and even knowing it was
there I would stumble on it.

Best to redo the stringers. The math and layout involved are not that
bad - check out a carpentry book and read up on it.

Harry K