Have you ever wondered how a stair builder,
creates a curved stair tread and riser? Well, the secrets out of the
bag. You can use different building materials, but I chose to use a
scrap piece of 1 - 1/8 inch plywood, to give myself some more nailing
room.
I used smaller pieces of plywood before, that split and are difficult to
drive nails into, because there are so small. In the picture above, it's
hard to see but I used a construction adhesive to glue the bottom nailer,
to the building foundation.
This also provides a moisture barrier between the concrete and the
plywood. The construction adhesive might separate over time, but I doubt
it will ever be a problem. You can always fasten the bottom nailer to
the concrete by using a wide variety of framing anchors
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