M
mikethetile
theres a lot of issues surrounding overplying floors which has become worse with the poor quality of ply now available
the market is ready for a non ply overboard that will stabilise the floors and provide a good surface to ply to
but there is another way to take the bounce out of floors if you can get access to the joists
cut strips of 18mm ply to the depth of the joist and glue and screw to each side, taking care to stagger the joints if the floor is over 2.4m
this does two things
because the ply is cross laminated it wont give or allow the joist to bounce
it also increases the section of the joist , so a 9x2 joist gives a cross section of 18" adding 1.5 " gives you 9x3,5 which is a cross section of 31,5". which in timber is double the strength of the joist and no bounce
this can then be noggined as usual to take any sideways deflection out of the floor
the market is ready for a non ply overboard that will stabilise the floors and provide a good surface to ply to
but there is another way to take the bounce out of floors if you can get access to the joists
cut strips of 18mm ply to the depth of the joist and glue and screw to each side, taking care to stagger the joints if the floor is over 2.4m
this does two things
because the ply is cross laminated it wont give or allow the joist to bounce
it also increases the section of the joist , so a 9x2 joist gives a cross section of 18" adding 1.5 " gives you 9x3,5 which is a cross section of 31,5". which in timber is double the strength of the joist and no bounce
this can then be noggined as usual to take any sideways deflection out of the floor