sagging floorboards fix

micks_address

hi folks,

not really going to diy this but looking for options. Our bedroom upstairs has always had a slight sag in part of the floor. Think the previous owners had a very heavy bed there and there was some bowing of the joists. Its not dramatic but annoying all the same. Few years ago had someone replace the laminate flooring and they put in a new bit of plywood in the area but its still too springy in that spot. the floor isnt level underneath the laminate. Would love to get it sorted it some stage. Whats the best way to sort it properly? Lift the floor - brace the joists the sagged a little? Or is there some sort of levelling compound that can be used? The house is 40 years old. Don't want to do a lot of ripping.

Cheers,

Mick

dmac.

Hi Mick,

How much of a sag is there and is the ceiling underneath also sagging?

A few mm sag could simply be a joist crowned the wrong way.

If it's significantly more than that - my guess is that one or more of the joists in that area are notched.

One solution would be to lift the floors and sister a new joist or joists to that area whilst also raising the floor from below to correct the sag.

Cheers

micks_address

https://www.boards.ie/discussion/comment/120333636#Comment_120333636

id say could be sagged by as much as 5 to 10mm.. you can probably see it on the ceiling underneath if you look for it.. but its not something we would go replacing (the ceiling)

thanks,

Mick