The upper stairs of the Victorian house (from 1st floor landing to
upper landing) attach ok to the brick wall at the side, but sag an
inch or two on the open side, especially at the bottom. I can jack
them up by putting an acro or two underneath supported by the lower
staircase (using planks etc.).
The question is how do you properly/securely reattach the bottom of
the stairs to the joist of the landing? (And the top.) Should it just
be some sort of long bolt, perhaps going through extra block of wood
to support the stairs.
Thanks for all advice,
Is it a straight flight or a turn ?
On a straight staircase the base is held in place by either a cut out on the
side string or a strap of timber all along the bottom to hold the strings in
place. The top end is normally leaning against a solid structure and held
in place with brackets, nails, bolts etc. etc.
If the stair is sagging, then I'd be looking to replace the strings which
hold the wooden treads in place. If these have begun to loosen or rot, then
it won't take long for the staircase to become so weak that it won't hold
http://www.diyfixit.com/ Choose "Carpentry" then look down the menu for
"Creaking Stairs" to find out a bit more on what to look for.
There is nothing keeping the top nosing tied to the rest of the stair
that will withstand much stress or strain. The outer string is kept in
place by the top newel into which it is glued and dowelled. The newel is
nailed or screwed to the floor/ceiling joists. The whole lot is leaning
against the floor with quite a bit of weight. You might want to check
what is holding the bottom in place.
What makes them squeak is when the wedges that hold the treads in work
loose. If you can tap them back in do so. You might also try putting
glue blocks in the angle between the risers and treads. Finally running
battons down the underside of the risers may help. For those without
much access to their stair's nether regions foam glue might help. Not
too sure about that though.
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